-Network: (104001 - Statement - Consolidated Balance Sheets)

-Statement of Financial Position [Abstract] {ID1}

-Statement [Table] {ID2}

-Statement, Scenario [Axis] {ID3}

Scenario, Unspecified [Domain] {ID4}

-Class of Stock [Axis] {ID5}

Class of Stock [Domain] {ID6}

-Statement [Line Items] {ID7}

-Assets [Abstract] {ID8}

-Assets, Current [Abstract] {ID9}

-Cash, Cash Equivalents, and Short-term Investments [Abstract] {ID10}

-Assets {ID11}

Cash {ID12}

Cash Equivalents, at Carrying Value {ID13}

Cash and cash equivalents {ID14}

Account receivable, net {ID15}

Inventories, net {ID16}

-Restricted Cash and Investments, Current [Abstract] {ID17}

Restricted Cash and Cash Equivalents, Current {ID18}

Marketable Securities, Restricted, Current {ID19}

Restricted Investments, Current {ID20}

Other Restricted Assets, Current {ID21}

Restricted Cash and Investments, Current, Total {ID22}

-Short-term Investments [Abstract] {ID23}

-Marketable Securities, Current [Abstract] {ID24}

-Trading Securities, Current [Abstract] {ID25}

Trading Securities, Debt, Current {ID26}

Trading Securities, Equity, Current {ID27}

Trading Securities, Current, Total {ID28}

-Available-for-sale Securities, Current [Abstract] {ID29}

Available-for-sale Securities, Debt Securities, Current {ID30}

Available-for-sale Securities, Equity Securities, Current {ID31}

Available-for-sale Securities, Current, Total {ID32}

Held-to-maturity Securities, Current {ID33}

Other Marketable Securities, Current {ID34}

Marketable Securities, Current, Total {ID35}

Other Short-term Investments {ID36}

Short-term Investments, Total {ID37}

Cash, Cash Equivalents, and Short-term Investments, Total {ID38}

-Receivables, Net, Current [Abstract] {ID39}

-Accounts, Notes, Loans and Financing Receivable, Net, Current [Abstract] {ID40}

-Accounts Receivable, Net, Current [Abstract] {ID41}

Accounts Receivable, Gross, Current {ID42}

Allowance for Doubtful Accounts Receivable, Current {ID43}

Accounts Receivable, Net, Current, Total {ID44}

-Notes, Loans and Financing Receivable, Net, Current [Abstract] {ID45}

Notes, Loans and Financing Receivable, Gross, Current {ID46}

Allowance for Notes, Loans and Financing Receivable, Current {ID47}

Notes, Loans and Financing Receivable, Net, Current, Total {ID48}

Accounts, Notes, Loans and Financing Receivable, Net, Current, Total {ID49}

Due from Related Parties, Current {ID50}

Receivables, Long-term Contracts or Programs {ID51}

-Inventory, Net [Abstract] {ID52}

Inventory, Finished Goods {ID53}

Inventory for Long-term Contracts or Programs {ID54}

Inventory, Work in Process {ID55}

Inventory, Raw Materials {ID56}

Other Inventory, Supplies {ID57}

Other Inventory {ID58}

Inventory Valuation Reserves {ID59}

Inventory, LIFO Reserve {ID60}

-Prepaid Expense, Current [Abstract] {ID61}

Prepaid Insurance {ID62}

Prepaid Rent {ID63}

Prepaid Advertising {ID64}

Prepaid Royalties {ID65}

Supplies {ID66}

Prepaid Interest {ID67}

Prepaid Taxes {ID68}

Other Prepaid Expense, Current {ID69}

Prepaid Expense, Current, Total {ID70}

-Deferred Costs, Current [Abstract] {ID71}

Deferred Finance Costs, Current, Net {ID72}

Deferred Costs, Leasing, Net, Current {ID73}

-Deferred Fuel Cost [Abstract] {ID74}

Deferred Gas Cost {ID75}

Deferred Electric Cost {ID76}

Deferred Fuel Cost, Total {ID77}

Deferred Storm and Property Reserve Deficiency, Current {ID78}

Deferred Set-up Costs, Current {ID79}

Deferred Subscriber Acquisition Costs, Current {ID80}

Deferred Offering Costs {ID81}

Other Deferred Costs, Net {ID82}

Deferred Costs, Current, Total {ID83}

-Derivative Instruments and Hedges, Assets [Abstract] {ID84}

Derivative Assets, Current {ID85}

Hedging Assets, Current {ID86}

Commodity Contract Asset, Current {ID87}

Energy Marketing Contracts Assets, Current {ID88}

Derivative Instruments and Hedges, Assets, Total {ID89}

-Assets Held-for-sale, Current [Abstract] {ID90}

Inventories, Property Held-for-sale, Current {ID91}

Receivables Held-for-sale, Net Amount {ID92}

Other Assets Held-for-sale, Current {ID93}

Assets Held-for-sale, Current, Total {ID94}

Capital Leases, Lessor Balance Sheet, Net Investment in Direct Financing and Sales Type Leases, Current {ID95}

Deferred Tax Assets, Net, Current {ID96}

Income Taxes Receivable, Current {ID97}

Regulatory Assets, Current {ID98}

Asset Recovery Damaged Property Costs, Current {ID99}

Funds Held for Clients {ID100}

Deferred Rent Asset, Net, Current {ID101}

Advances on Inventory Purchases {ID102}

Costs in Excess of Billings on Uncompleted Contracts or Programs Expected to be Collected within One Year {ID103}

Health Care Trust Fund, Assets Limited as to Use, Current {ID104}

Assets of Disposal Group, Including Discontinued Operation, Current {ID105}

Custom Prepaid Expense and other current assets {ID106}

Prepaid expenses and other current assets {ID107}

Deposits Assets, Current {ID108}

Total Current Assets {ID109}

Property, plant and equipment, net {ID110}

Cost in excess of net assets acquired {ID111}

Prepaid pension asset {ID112}

Deferred income taxes {ID113}

Other assets {ID114}

-Noncurrent Assets {ID115}

-Inventory, Noncurrent [Abstract] {ID116}

Inventory, Gas in Storage Underground, Noncurrent {ID117}

Inventory, Drilling, Noncurrent {ID118}

Other Inventory, Noncurrent {ID119}

Inventory, Noncurrent, Total {ID120}

-Property, Plant and Equipment, Net [Abstract] {ID121}

-Property, Plant and Equipment, Gross [Abstract] {ID122}

Land {ID123}

Buildings and Improvements, Gross {ID124}

Machinery and Equipment, Gross {ID125}

Furniture and Fixtures, Gross {ID126}

Construction in Progress, Gross {ID127}

Leasehold Improvements, Gross {ID128}

Capital Leased Assets, Gross {ID129}

Property Subject to or Available for Operating Lease, Gross {ID130}

Timber and Timberlands {ID131}

Property, Plant and Equipment, Other {ID132}

Property, Plant and Equipment, Gross, Total {ID133}

Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment {ID134}

-Long-term Investments and Receivables, Net [Abstract] {ID135}

-Long-term Investments [Abstract] {ID136}

-Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] {ID137}

Equity Method Investments {ID138}

Cost Method Investments {ID139}

Advances to Affiliate {ID140}

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Total {ID141}

-Marketable Securities, Noncurrent [Abstract] {ID142}

-Available-for-sale Securities, Noncurrent [Abstract] {ID143}

Available-for-sale Securities, Equity Securities, Noncurrent {ID144}

Available-for-sale Securities, Debt Securities, Noncurrent {ID145}

Available-for-sale Securities, Noncurrent, Total {ID146}

Held-to-maturity Securities, Noncurrent {ID147}

Other Marketable Securities, Noncurrent {ID148}

Marketable Securities, Noncurrent, Total {ID149}

Investment in Physical Commodities {ID150}

Health Care Trust Fund, Assets Limited as to Use, Noncurrent {ID151}

Other Long-term Investments {ID152}

Long-term Investments, Total {ID153}

-Accounts, Notes, Loans and Financing Receivable, Net, Noncurrent [Abstract] {ID154}

-Accounts Receivable, Net, Noncurrent [Abstract] {ID155}

Accounts Receivable, Gross, Noncurrent {ID156}

Allowance for Doubtful Accounts Receivable, Noncurrent {ID157}

Accounts Receivable, Net, Noncurrent, Total {ID158}

-Notes, Loans and Financing Receivable, Net, Noncurrent [Abstract] {ID159}

Notes, Loans and Financing Receivable, Gross, Noncurrent {ID160}

Allowance for Notes, Loans and Financing Receivable, Noncurrent {ID161}

Notes, Loans and Financing Receivable, Net, Noncurrent, Total {ID162}

Accounts, Notes, Loans and Financing Receivable, Net, Noncurrent, Total {ID163}

Due from Related Parties, Noncurrent {ID164}

Capital Leases, Lessor Balance Sheet, Net Investment in Direct Financing and Sales Type Leases, Noncurrent {ID165}

Long-term Investments and Receivables, Net, Total {ID166}

-Intangible Assets, Net (Excluding Goodwill) [Abstract] {ID167}

-Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract] {ID168}

Indefinite-Lived Contractual Rights {ID169}

Indefinite-Lived Franchise Rights {ID170}

Indefinite-Lived License Agreements {ID171}

Indefinite-Lived Trademarks {ID172}

Indefinite-Lived Trade Names {ID173}

Indefinite-Lived Trade Dress {ID174}

Indefinite-Lived Trade Secrets {ID175}

Other Indefinite-lived Intangible Assets {ID176}

Indefinite-Lived Intangible Assets (Excluding Goodwill), Total {ID177}

-Finite-Lived Intangible Assets, Net [Abstract] {ID178}

-Finite-Lived Intangible Assets, Gross [Abstract] {ID179}

Finite-Lived Computer Software, Gross {ID180}

Finite-Lived Contractual Rights, Gross {ID181}

Finite-Lived Copyrights, Gross {ID182}

Finite-Lived Customer Lists, Gross {ID183}

Finite-Lived Customer Relationships, Gross {ID184}

Finite-Lived Distribution Rights, Gross {ID185}

Finite-Lived Franchise Rights, Gross {ID186}

Finite-Lived License Agreements, Gross {ID187}

Finite-Lived Media Content, Gross {ID188}

Finite-Lived Noncompete Agreements, Gross {ID189}

Finite-Lived Coal Supply Agreement, Gross {ID190}

Finite-Lived Intangible Asset, Off-market Lease, Favorable, Gross {ID191}

Finite-Lived Transmission Service Agreement, Gross {ID192}

Finite-Lived Patents, Gross {ID193}

Finite-Lived Royalty, Gross {ID194}

Finite-Lived Trademarks, Gross {ID195}

Finite-Lived Trade Names, Gross {ID196}

Finite-Lived Trade Secrets, Gross {ID197}

Other Finite-Lived Intangible Assets, Gross {ID198}

Finite-Lived Intangible Assets, Gross, Total {ID199}

Finite-Lived Intangible Assets, Accumulated Amortization {ID200}

Finite-Lived Intangible Assets, Net, Total {ID201}

Intangible Assets, Net (Excluding Goodwill), Total {ID202}

-Prepaid Expense, Noncurrent [Abstract] {ID203}

Prepaid Expense Other, Noncurrent {ID204}

Prepaid Mineral Royalties, Noncurrent {ID205}

Prepaid Expense, Noncurrent, Total {ID206}

-Derivative Instruments and Hedges, Noncurrent [Abstract] {ID207}

Derivative Assets, Noncurrent {ID208}

Hedging Assets, Noncurrent {ID209}

Commodity Contract Asset, Noncurrent {ID210}

Energy Marketing Contracts Assets, Noncurrent {ID211}

Gas Purchase Contract, Net {ID212}

Derivative Instruments and Hedges, Noncurrent, Total {ID213}

-Assets Held-for-sale, Long Lived [Abstract] {ID214}

Assets Held-for-sale, Capital Leased Assets, Net {ID215}

Assets Held-for-sale, Property, Plant and Equipment {ID216}

Assets Held-for-sale, Other, Noncurrent {ID217}

Assets Held-for-sale, Long Lived, Total {ID218}

-Regulated Entity, Other Assets, Noncurrent [Abstract] {ID219}

Regulatory Assets, Noncurrent {ID220}

Competitive Transition Charge, Noncurrent {ID221}

Securitized Regulatory Transition Assets, Noncurrent {ID222}

Demand Side Management Program Costs, Noncurrent {ID223}

Unamortized Loss Reacquired Debt, Noncurrent {ID224}

Decommissioning Fund Investments {ID225}

Asset Recovery Damaged Property Costs, Noncurrent {ID226}

Deferred Storm and Property Reserve Deficiency, Noncurrent {ID227}

Investments in Power and Distribution Projects {ID228}

Phase-in Plan, Amount of Costs Deferred for Rate-making Purposes {ID229}

Unamortized Debt Issuance Expense {ID230}

Regulated Entity, Other Assets, Noncurrent, Total {ID231}

Prepaid Pension Costs {ID232}

Deferred Finance Costs, Noncurrent, Net {ID233}

Deferred Costs, Leasing, Net, Noncurrent {ID234}

Deferred Set-up Costs, Noncurrent {ID235}

Deferred Subscriber Acquisition Costs, Noncurrent {ID236}

Incentive to Lessee {ID237}

Deposits Assets, Noncurrent {ID238}

Costs in Excess of Billings on Uncompleted Contracts or Programs Expected to be Collected after One Year {ID239}

Insurance Receivable for Malpractice, Noncurrent {ID240}

Deferred Rent Receivables, Net, Noncurrent {ID241}

Assets Held-in-trust, Noncurrent {ID242}

-Restricted Cash and Investments, Noncurrent [Abstract] {ID243}

Restricted Cash and Cash Equivalents, Noncurrent {ID244}

Marketable Securities, Restricted, Noncurrent {ID245}

Restricted Investments, Noncurrent {ID246}

Other Restricted Assets, Noncurrent {ID247}

Restricted Cash and Investments, Noncurrent, Total {ID248}

Assets of Disposal Group, Including Discontinued Operation, Noncurrent {ID249}

Assets, Noncurrent, Total {ID250}

Total Assets {ID251}

-Liabilities and Stockholders' Equity [Abstract] {ID252}

-Liabilities [Abstract] {ID253}

-Liabilities, Current [Abstract] {ID254}

-Liabilities and Equity {ID255}

Accounts payable {ID256}

Accrued liabilities {ID257}

Employee-related Liabilities, Current {ID258}

-Taxes Payable, Current [Abstract] {ID259}

Accrued Income Taxes, Current {ID260}

Sales and Excise Tax Payable, Current {ID261}

Accrual for Taxes Other than Income Taxes, Current {ID262}

Taxes Payable, Current, Total {ID263}

Interest and Dividends Payable, Current {ID264}

Accounts Payable and Accrued Liabilities, Current, Total {ID265}

Deferred income taxes {ID266}

Short-term debt and current portion of long-term debt {ID267}

-Debt, Current [Abstract] {ID268}

-Short-term Borrowings [Abstract] {ID269}

Bank Overdrafts {ID270}

Commercial Paper {ID271}

Bridge Loan {ID272}

Construction Loan {ID273}

Short-term Bank Loans and Notes Payable {ID274}

Short-term Non-bank Loans and Notes Payable {ID275}

Other Short-term Borrowings {ID276}

Short-term Borrowings, Total {ID277}

-Long-term Debt and Capital Lease Obligations, Current [Abstract] {ID278}

-Long-term Debt, Current Maturities [Abstract] {ID279}

Secured Debt, Current {ID280}

Convertible Debt, Current {ID281}

Unsecured Debt, Current {ID282}

Subordinated Debt, Current {ID283}

Convertible Subordinated Debt, Current {ID284}

Other Long-term Debt, Current {ID285}

Line of Credit, Current {ID286}

-Notes and Loans Payable, Current [Abstract] {ID287}

-Notes Payable, Current [Abstract] {ID288}

Convertible Notes Payable, Current {ID289}

Notes Payable to Bank, Current {ID290}

Senior Notes, Current {ID291}

Junior Subordinated Notes, Current {ID292}

Other Notes Payable, Current {ID293}

Notes Payable, Current, Total {ID294}

-Loans Payable, Current [Abstract] {ID295}

Loans Payable to Bank, Current {ID296}

Other Loans Payable, Current {ID297}

Loans Payable, Current, Total {ID298}

Notes and Loans Payable, Current, Total {ID299}

Long-term Debt, Current Maturities, Total {ID300}

Capital Lease Obligations, Current {ID301}

Long-term Debt and Capital Lease Obligations, Current, Total {ID302}

-Deferred Compensation Liability, Current [Abstract] {ID303}

Deferred Compensation Share-based Arrangements, Liability, Current {ID304}

Deferred Compensation Cash-based Arrangements, Liability, Current {ID305}

Other Deferred Compensation Arrangements, Liability, Current {ID306}

Deferred Compensation Liability, Current, Total {ID307}

-Deferred Revenue and Credits, Current [Abstract] {ID308}

Deferred Revenue, Current {ID309}

Deferred Air Traffic Revenue {ID310}

Other Deferred Credits, Current {ID311}

Deferred Rent Credit, Current {ID312}

Deferred Revenue and Credits, Current, Total {ID313}

-Derivative Instruments and Hedges, Liabilities [Abstract] {ID314}

Derivative Liabilities, Current {ID315}

Hedging Liabilities, Current {ID316}

Energy Marketing Contract Liabilities, Current {ID317}

Derivative Instruments and Hedges, Liabilities, Total {ID318}

Liability for Uncertain Tax Positions, Current {ID319}

Postemployment Benefits Liability, Current {ID320}

Securities Loaned {ID321}

Regulatory Liability, Current {ID322}

Provision for Loss on Contracts {ID323}

Litigation Reserve, Current {ID324}

Accrued Environmental Loss Contingencies, Current {ID325}

Asset Retirement Obligation, Current {ID326}

Accrued Capping, Closure, Post-closure and Environmental Costs {ID327}

Accrued Reclamation Costs, Current {ID328}

Deferred Gas Purchases, Current {ID329}

Due to Related Parties, Current {ID330}

Liabilities of Disposal Group, Including Discontinued Operation, Current {ID331}

Liabilities of Business Transferred under Contractual Arrangement, Current {ID332}

Other Liabilities, Current {ID333}

Total Current Liabilities {ID334}

Long-term debt {ID335}

Accrued postretirement benefits {ID336}

Pension liabilities {ID337}

Other long-term liabilities {ID338}

-Liabilities, Noncurrent [Abstract] {ID339}

Accounts Payable and Accrued Liabilities, Noncurrent {ID340}

Accrued Income Taxes, Noncurrent {ID341}

-Long-term Liabilities {ID342}

-Long-term Debt, Excluding Current Maturities [Abstract] {ID343}

Long-term Line of Credit, Noncurrent {ID344}

Long-term Commercial Paper, Noncurrent {ID345}

Long-term Construction Loan, Noncurrent {ID346}

Secured Long-term Debt, Noncurrent {ID347}

Subordinated Long-term Debt, Noncurrent {ID348}

Unsecured Long-term Debt, Noncurrent {ID349}

Convertible Debt, Noncurrent {ID350}

Convertible Subordinated Debt, Noncurrent {ID351}

Long-term Transition Bond, Noncurrent {ID352}

Long-term Pollution Control Bond, Noncurrent {ID353}

-Notes and Loans, Noncurrent [Abstract] {ID354}

-Notes Payable, Noncurrent [Abstract] {ID355}

Junior Subordinated Notes, Noncurrent {ID356}

Senior Notes, Noncurrent {ID357}

Convertible Notes Payable, Noncurrent {ID358}

Notes Payable to Bank, Noncurrent {ID359}

Other Notes Payable, Noncurrent {ID360}

Notes Payable, Noncurrent, Total {ID361}

-Loans Payable, Noncurrent [Abstract] {ID362}

Loans Payable to Bank, Noncurrent {ID363}

Other Loans Payable, Long-term, Noncurrent {ID364}

Loans Payable, Noncurrent, Total {ID365}

Notes and Loans, Noncurrent, Total {ID366}

Other Long-term Debt, Noncurrent {ID367}

Long-term Debt, Excluding Current Maturities, Total {ID368}

Capital Lease Obligations, Noncurrent {ID369}

Deferred Compensation Liability, Classified, Noncurrent {ID370}

-Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent [Abstract] {ID371}

Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent, Total {ID372}

-Deferred Revenue and Credits, Noncurrent [Abstract] {ID373}

Deferred Revenue, Noncurrent {ID374}

Accumulated Deferred Investment Tax Credit {ID375}

Deferred Rent Credit, Noncurrent {ID376}

Other Deferred Credits, Noncurrent {ID377}

Incentive from Lessor {ID378}

Deferred Revenue and Credits, Noncurrent, Total {ID379}

-Asset Retirement Obligations, Noncurrent [Abstract] {ID380}

Mine Reclamation and Closing Liability, Noncurrent {ID381}

Oil and Gas Reclamation Liability, Noncurrent {ID382}

Accrued Capping, Closure, Post-closure and Environmental Costs, Noncurrent {ID383}

Decommissioning Liability, Noncurrent {ID384}

Spent Nuclear Fuel Obligation, Noncurrent {ID385}

Asset Retirement Obligations, Noncurrent, Total {ID386}

-Customer Advances or Deposits, Noncurrent [Abstract] {ID387}

Customer Advances, Noncurrent {ID388}

Customer Advances for Construction {ID389}

Customer Deposits, Noncurrent {ID390}

Customer Advances or Deposits, Noncurrent, Total {ID391}

Deferred Tax Liabilities, Noncurrent {ID392}

Liability for Uncertain Tax Positions, Noncurrent {ID393}

Postemployment Benefits Liability, Noncurrent {ID394}

Accrued Environmental Loss Contingencies, Noncurrent {ID395}

Coal Supply Agreement Obligation, Noncurrent {ID396}

Customer Refund Liability, Noncurrent {ID397}

Derivative Liabilities, Noncurrent {ID398}

Off-market Lease, Unfavorable {ID399}

Shares Subject to Mandatory Redemption, Settlement Terms, Amount, Noncurrent {ID400}

Self Insurance Reserve {ID401}

Litigation Reserve, Noncurrent {ID402}

Regulatory Liability, Noncurrent {ID403}

Restructuring Reserve, Noncurrent {ID404}

Due to Related Parties, Noncurrent {ID405}

Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent {ID406}

Liabilities of Business Transferred under Contractual Arrangement, Noncurrent {ID407}

Liabilities, Noncurrent, Total {ID408}

Total Liabilities {ID409}

Commitments and Contingencies {ID410}

-Temporary Equity [Abstract] {ID411}

Temporary Equity, Redemption Value {ID412}

Temporary Equity, Shares Subscribed but Unissued, Subscriptions Receivable {ID413}

Temporary Equity, Share Subscriptions {ID414}

Temporary Equity, Shares Subscribed but Unissued {ID415}

Temporary Equity, Shares Authorized {ID416}

Temporary Equity, Shares Issued {ID417}

Temporary Equity, Shares Outstanding {ID418}

Temporary Equity, Carrying Amount {ID419}

-Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] {ID420}

-Equity: {ID421}

ATI Stockholders' Equity {ID422}

Preferred Stock Par Value, Issued {ID423}

Common Stock Par Value, Issued {ID424}

Preferred Stock, Shares Subscribed but Unissued, Subscriptions Receivable {ID425}

Common Stock Held by Subsidiary {ID426}

Common Stock, Share Subscribed but Unissued, Subscriptions Receivable {ID427}

Additional Paid in Capital {ID428}

Retained Earnings {ID429}

-Additional Paid in Capital [Abstract] {ID430}

Additional Paid in Capital, Preferred Stock {ID431}

Additional Paid in Capital, Total {ID432}

Other Additional Capital {ID433}

Retained Earnings Deficit Eliminated {ID434}

Treasury Stock, Value {ID435}

Treasury Stock, Deferred Employee Stock Ownership Plan {ID436}

Deferred Compensation Equity {ID437}

Accumulated other comprehensive income (loss), net of tax {ID438}

-Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] {ID439}

Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax {ID440}

Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax {ID441}

Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax {ID442}

Accumulated Other Comprehensive Income (Loss), Defined Benefit Pension and Other Postretirement Plans, Net of Tax {ID443}

-Retained Earnings (Accumulated Deficit) [Abstract] {ID444}

Retained Earnings, Appropriated {ID445}

Retained Earnings, Unappropriated {ID446}

Unearned ESOP Shares {ID447}

Receivable from Officers and Directors for Issuance of Capital Stock {ID448}

Receivable from Shareholders or Affiliates for Issuance of Capital Stock {ID449}

Total ATI Stockholders' Equity {ID450}

Noncontrolling Interests {ID451}

Total Equity {ID452}

Total Liabilities and Equity {ID453}

-Stockholders' Equity, Number of Shares, Par Value and Other Disclosures [Abstract] {ID454}

-Preferred Stock {ID455}

Preferred Stock, Par Value Per Share {ID456}

Preferred Stock, No Par Value {ID457}

Preferred Stock, Shares Subscriptions {ID458}

Preferred Stock, Shares Subscribed but Unissued {ID459}

Preferred Stock, Shares Authorized {ID460}

Preferred Stock, Shares Issued {ID461}

Preferred Stock, Shares Outstanding {ID462}

Preferred Stock, Value, Outstanding {ID463}

Preferred Stock, Redemption Amount {ID464}

Preferred Stock, Liquidation Preference Per Share {ID465}

Preferred Stock, Conversion Basis {ID466}

-Common Stock {ID467}

Common Stock, Par Value Per Share {ID468}

Common Stock, No Par Value {ID469}

Common Stock, Value, Subscriptions {ID470}

Common Stock, Shares Subscribed but Unissued {ID471}

Common Stock, Shares Authorized {ID472}

Common Stock, Shares, Issued {ID473}

Common Stock, Shares, Outstanding {ID474}

Common Stock, Value, Outstanding {ID475}

Common Stock, Conversion Basis {ID476}

Common Stock Issued, Employee Stock Trust {ID477}

Common Stock Issued, Employee Trust, Deferred {ID478}

Common Stock Held in Trust {ID479}

-Treasury Stock {ID480}

Treasury Stock, Shares {ID481}

Treasury Stock, Restrictions {ID482}

-Partners' Capital [Abstract] {ID483}

-General Partners' Capital Account [Abstract] {ID484}

General Partners' Capital Account, Units Authorized {ID485}

General Partners' Capital Account, Units Issued {ID486}

General Partners' Capital Account, Units Outstanding {ID487}

General Partners' Capital Account {ID488}

-Limited Partners' Capital Account [Abstract] {ID489}

Limited Partners' Capital Account, Units Authorized {ID490}

Limited Partners' Capital Account, Units Issued {ID491}

Limited Partners' Capital Account, Units Outstanding {ID492}

Limited Partners' Capital Account {ID493}

-Preferred Units, Preferred Partners' Capital Account [Abstract] {ID494}

Preferred Units, Preferred Partners' Capital Account, Units Authorized {ID495}

Preferred Units, Preferred Partners' Capital Account, Units Issued {ID496}

Preferred Units, Preferred Partners' Capital Account, Units Outstanding {ID497}

Preferred Units, Preferred Partners' Capital Accounts {ID498}

-Partners' Capital Deferred Compensation [Abstract] {ID499}

Partners' Capital Deferred Compensation on Restricted Unit {ID500}

Partners' Capital Other Deferred Compensation {ID501}

Partners' Capital Deferred Compensation, Total {ID502}

Other Partners' Capital {ID503}

Partners' Capital Allocated for Income Tax and Other Withdrawals {ID504}

Other Ownership Interests, Capital Account {ID505}

Partners' Capital, Total {ID506}

-Network: (124002 - Statement - Consolidated Statements of Operations)

-Income Statement [Abstract] {ID507}

-Statement [Table] {ID508}

-Statement, Scenario [Axis] {ID509}

Scenario, Unspecified [Domain] {ID510}

-Statement [Line Items] {ID511}

Sales {ID512}

-Net Income (Loss) Available to Common Stockholders, Basic [Abstract] {ID513}

-Net Income (Loss) Attributable to Parent [Abstract] {ID514}

-Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract] {ID515}

-Income (Loss) before Cumulative Effect of Change in Accounting Principle [Abstract] {ID516}

-Income (Loss) before Extraordinary Items and Cumulative Effect of Change in Accounting Principle [Abstract] {ID517}

-Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract] {ID518}

-Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest [Abstract] {ID519}

-Operating Income (Loss) [Abstract] {ID520}

-Gross Profit [Abstract] {ID521}

-Revenues [Abstract] {ID522}

-Sales Revenue, Net [Abstract] {ID523}

-Sales Revenue, Goods, Net [Abstract] {ID524}

Sales Revenue, Goods, Gross {ID525}

-Sales Returns and Allowances, Goods [Abstract] {ID526}

Sales Returns, Goods {ID527}

Sales Allowances, Goods {ID528}

Sales Returns and Allowances, Goods, Total {ID529}

Sales Discounts, Goods {ID530}

Shipping and Handling Revenue {ID531}

-Sales Revenue, Services, Net [Abstract] {ID532}

Sales Revenue, Services, Other {ID533}

Technology Services Revenue {ID534}

License and Maintenance Revenue {ID535}

License and Services Revenue {ID536}

Maintenance Revenue {ID537}

Contracts Revenue {ID538}

Revenue, Environmental Remediation Services {ID539}

Revenue, Oil and Gas Services {ID540}

Revenue, Coal Services {ID541}

Sales Allowances, Services {ID542}

Sales Discounts, Services {ID543}

Sales Revenue, Services, Net, Total {ID544}

-Sales Revenue from Energy Commodities and Services [Abstract] {ID545}

Sales Revenue, Energy Services {ID546}

Sales Revenue from Energy Commodities and Services, Total {ID547}

-Electric and Gas Revenue [Abstract] {ID548}

-Electric Revenue [Abstract] {ID549}

Electric Bundled Revenue {ID550}

Electrical Generation Revenue {ID551}

Competitive Energy Revenue {ID552}

-Electrical Transmission and Distribution Revenue [Abstract] {ID553}

Electrical Transmission Revenue {ID554}

Electrical Distribution Revenue {ID555}

Electrical Transmission and Distribution Revenue, Total {ID556}

Electric Domestic Regulated Revenue {ID557}

Electric Worldwide Unregulated Revenue {ID558}

Electric Revenue, Total {ID559}

Gas Domestic Regulated Revenue {ID560}

Electric and Gas Revenue, Total {ID561}

Phase-in Plan, Amount of Capitalized Costs Recovered {ID562}

-Revenue Mineral Sales [Abstract] {ID563}

Gold Products and Services Revenue {ID564}

Coal Products and Services Revenue {ID565}

Chemicals Revenue {ID566}

Revenue Mineral Sales, Total {ID567}

Secondary Processing Revenue {ID568}

-Oil and Gas Revenue [Abstract] {ID569}

Oil and Gas Sales Revenue {ID570}

Synthetic Fuel Sales Revenue {ID571}

Other Alternative Energy Sales Revenue {ID572}

Binder Sales Revenue {ID573}

Exploration and Production Revenue {ID574}

-Natural Gas Midstream Revenue [Abstract] {ID575}

Natural Gas Storage Revenue {ID576}

Fractionation Revenue {ID577}

Natural Gas Midstream Revenue, Total {ID578}

Refining and Marketing Revenue {ID579}

Marine Services Revenue {ID580}

Natural Gas Production Revenue {ID581}

Brokered Natural Gas Margin Revenue {ID582}

Propane Revenue {ID583}

Revenue from Purchased Oil and Gas {ID584}

Oil and Condensate Revenue {ID585}

Gas Gathering, Transportation, Marketing and Processing Revenue {ID586}

Oil and Gas Revenue, Total {ID587}

Sales of Oil and Gas Prospects {ID588}

-Royalty Revenue [Abstract] {ID589}

Royalty Revenue from Coal {ID590}

Royalty Revenue, Total {ID591}

Revenue Steam Products and Services {ID592}

-Real Estate Revenue, Net [Abstract] {ID593}

-Construction Revenue [Abstract] {ID594}

Home Building Revenue {ID595}

General Contractor Revenue {ID596}

Other Construction Revenue {ID597}

Construction Revenue, Total {ID598}

Land Sales {ID599}

Retail Land Sales, Improvement Revenue, Prior Sales {ID600}

Time Share Revenue {ID601}

Tenant Reimbursements {ID602}

-Management Fees Revenue [Abstract] {ID603}

Management Fees, Base Revenue {ID604}

Management Fees, Incentive Revenue {ID605}

Management Fees Revenue, Total {ID606}

Facility Membership and Operations Revenue {ID607}

Parking Revenue {ID608}

Signage Revenue {ID609}

Sales of Real Estate {ID610}

Concessions Revenue {ID611}

Other Real Estate Revenue {ID612}

Real Estate Revenue, Net, Total {ID613}

-Revenue from Hotels [Abstract] {ID614}

Revenue from Owned Hotels {ID615}

Occupancy Revenue {ID616}

Casino Revenue {ID617}

Food and Beverage Revenue {ID618}

Retail Revenue {ID619}

Other Hotel Operating Revenue {ID620}

Promotional Allowances {ID621}

Revenue from Hotels, Total {ID622}

Operating Leases, Income Statement, Lease Revenue {ID623}

Reimbursement Revenue {ID624}

Subscription Revenue {ID625}

Advertising Revenue {ID626}

Admissions Revenue {ID627}

-Health Care Organization, Revenue [Abstract] {ID628}

Health Care Organization, Patient Service Revenue {ID629}

Health Care Organization, Premium Revenue {ID630}

Health Care Organization, Capitation Revenue {ID631}

Health Care Organization, Resident Service Revenue {ID632}

Health Care Organization, Other Revenue {ID633}

Health Care Organization, Revenue, Total {ID634}

Revenue from Enrollment and Registration Fees, Excluding Hospitality Enterprises {ID635}

Membership Dues Revenue, On-going {ID636}

Licenses Revenue {ID637}

Franchise Revenue {ID638}

Clearing Fees Revenue {ID639}

Revenue from Grants {ID640}

Revenue Other Manufactured Products {ID641}

Construction Materials Revenue {ID642}

Timber Revenue {ID643}

Recycling Revenue {ID644}

Passenger Revenue {ID645}

Cargo and Freight Revenue {ID646}

Vehicle Toll Revenue {ID647}

Revenue from Related Parties {ID648}

Other Sales Revenue, Net {ID649}

Sales Revenue, Net, Total {ID650}

-Financial Services Revenue [Abstract] {ID651}

Interest Income, Operating {ID652}

Fees and Commissions {ID653}

Gains (Losses) on Sales of Assets {ID654}

Principal Transactions Revenue {ID655}

Premiums Earned, Net {ID656}

Revenue, Other Financial Services {ID657}

Financial Services Revenue, Total {ID658}

Revenues, Total {ID659}

-Cost of Revenue [Abstract] {ID660}

-Cost of Goods and Services Sold [Abstract] {ID661}

-Cost and expenses: {ID662}

Cost of Goods Sold, Direct Materials {ID663}

Cost of Goods Sold, Direct Labor {ID664}

Cost of Goods Sold, Overhead {ID665}

-Cost of Goods Sold, Depreciation, Depletion and Amortization [Abstract] {ID666}

-Cost of Goods Sold, Depreciation and Amortization [Abstract] {ID667}

Cost of Goods Sold, Depreciation {ID668}

Cost of Goods Sold, Amortization {ID669}

Cost of Goods Sold, Depreciation and Amortization, Total {ID670}

Cost of Goods Sold, Depletion {ID671}

Cost of Goods Sold, Depreciation, Depletion and Amortization, Total {ID672}

Cost of Goods Sold, Direct Taxes and Licenses Costs {ID673}

Cost of Goods Sold, Maintenance Costs {ID674}

Cost of sales {ID675}

Selling and administrative expenses {ID676}

-Cost of Services [Abstract] {ID677}

Cost of Services, Direct Materials {ID678}

Cost of Services, Direct Labor {ID679}

Cost of Services, Overhead {ID680}

-Cost of Services, Depreciation and Amortization [Abstract] {ID681}

Cost of Services, Depreciation {ID682}

Cost of Services, Amortization {ID683}

Cost of Services, Depreciation and Amortization, Total {ID684}

Cost of Services, Direct Taxes and Licenses Costs {ID685}

Cost of Services, Maintenance Costs {ID686}

Cost of Services, Licenses and Services {ID687}

Cost of Services, Licenses and Maintenance Agreements {ID688}

Technology Services Costs {ID689}

Embedded Service Costs {ID690}

Cost of Services, Energy Services {ID691}

Cost of Services, Environmental Remediation {ID692}

Other Cost of Services {ID693}

Cost of Services, Total {ID694}

-Cost of Real Estate Revenue [Abstract] {ID695}

-Construction and Development Costs [Abstract] {ID696}

Home Building Costs {ID697}

General Contractor Costs {ID698}

Other Construction Costs {ID699}

Construction and Development Costs, Total {ID700}

Costs of Real Estate Services and Land Sales {ID701}

Time Share Costs {ID702}

Time Share Carrying Charges {ID703}

Direct Costs of Leased and Rented Property or Equipment {ID704}

Owned Property Management Costs {ID705}

Retail Land Sales, Improvement Costs, Prior Sales {ID706}

-Cost of Real Estate Sales [Abstract] {ID707}

Cost of Real Estate Sales, Interest {ID708}

Cost of Real Estate Sales, Excluding Interest {ID709}

Cost of Real Estate Sales, Total {ID710}

-Direct Costs of Hotels [Abstract] {ID711}

Direct Costs of Owned Hotels {ID712}

Direct Costs of Leased Hotels {ID713}

Occupancy Costs {ID714}

Casino Expenses {ID715}

Food and Beverage, Cost of Sales {ID716}

Retail Expenses {ID717}

Other Direct Costs of Hotels {ID718}

Direct Costs of Hotels, Total {ID719}

Concessions Costs {ID720}

Cost of Real Estate Revenue, Total {ID721}

Service Management Costs {ID722}

Asset Management Costs {ID723}

Cost of Property Repairs and Maintenance {ID724}

Facility Membership and Operations Costs {ID725}

Cost of Other Property Operating Expense {ID726}

Cost of Goods and Services, Energy Commodities and Services {ID727}

Cost of Utilities {ID728}

-Direct Operating Costs [Abstract] {ID729}

-Cost of Goods Sold, Electric [Abstract] {ID730}

Cost of Domestic Regulated Electric {ID731}

Cost of Worldwide Unregulated Electric {ID732}

Electric Production Expense {ID733}

Cost of Purchased Power {ID734}

-Cost of Transmission [Abstract] {ID735}

Cost of Transmission, Affiliates {ID736}

Cost of Transmission, Other {ID737}

Cost of Transmission, Total {ID738}

Cost of Goods Sold, Electric, Total {ID739}

-Cost of Goods Sold, Oil and Gas [Abstract] {ID740}

Synthetic Fuel Costs {ID741}

Cost of Other Alternative Energy {ID742}

Binder Costs {ID743}

Facility Costs {ID744}

Refining and Marketing Costs {ID745}

Marine Services Costs {ID746}

Brokered Natural Gas Margin Costs {ID747}

Natural Gas Midstream Costs {ID748}

Propane Costs {ID749}

Other Utility Costs {ID750}

Exploration and Production Costs {ID751}

Oil and Gas Production Expense {ID752}

Cost of Purchased Oil and Gas {ID753}

Oil and Gas Property, Lease Operating Expense {ID754}

Well Service Expense {ID755}

Gas Gathering, Transportation, Marketing and Processing Costs {ID756}

Cost of Goods Sold, Oil and Gas, Total {ID757}

Cost of Secondary Processing {ID758}

Cost of Other Manufactured Products {ID759}

Water Production Costs {ID760}

Cost of Purchased Water {ID761}

Recycling Operating Costs {ID762}

Timber Operating Costs {ID763}

-Mineral Extraction Processing and Marketing Costs [Abstract] {ID764}

Cost of Gold Products and Services {ID765}

Cost of Coal Products and Services {ID766}

Cost of Chemicals {ID767}

Costs of Metals Sold {ID768}

Mineral Extraction Processing and Marketing Costs, Total {ID769}

Freight Costs {ID770}

Shipping, Handling and Transportation Costs {ID771}

Recovery of Direct Costs {ID772}

Cost of Oil and Gas Prospects {ID773}

Manufacturing Costs {ID774}

Direct Operating Maintenance Supplies Costs {ID775}

Operating Insurance and Claims Costs, Production {ID776}

Cost of Goods and Services Sold, Overhead {ID777}

Fuel Costs {ID778}

-Direct Communications and Utilities Costs [Abstract] {ID779}

Direct Operating Communications Costs {ID780}

Utilities Costs {ID781}

Direct Communications and Utilities Costs, Total {ID782}

Aircraft Rental and Landing Fees {ID783}

Direct Taxes and Licenses Costs {ID784}

-Cost of Goods and Services Sold, Depreciation and Amortization [Abstract] {ID785}

Cost of Goods and Services Sold, Depreciation {ID786}

Cost of Goods and Services Sold, Amortization {ID787}

Cost of Goods and Services Sold, Depreciation and Amortization, Total {ID788}

Direct Operating Costs, Total {ID789}

Cost of Goods Sold, Subscription {ID790}

Advertising Revenue Cost {ID791}

Maintenance Costs {ID792}

Contract Revenue Cost {ID793}

Loss on Contracts {ID794}

License Costs {ID795}

Direct Operating Cost, Royalty Expense {ID796}

Health Care Organization, Medical Supplies and Drugs Expense {ID797}

Franchise Costs {ID798}

Affiliate Costs {ID799}

Related Party Costs {ID800}

Cost of Reimbursable Expense {ID801}

Excise and Sales Taxes {ID802}

-Production Related Impairments or Charges [Abstract] {ID803}

Inventory Write-down {ID804}

Production Related Impairments or Charges, Total {ID805}

Cost of Goods and Services Sold, Total {ID806}

-Financial Services Costs [Abstract] {ID807}

Financing Interest Expense {ID808}

Provision for Loan and Lease Losses {ID809}

Policyholder Benefits and Claims Incurred, Net {ID810}

Other Financial Services Costs {ID811}

Financial Services Costs, Total {ID812}

Other Cost of Operating Revenue {ID813}

Cost of Revenue, Total {ID814}

Gross Profit, Total {ID815}

-Operating Expenses [Abstract] {ID816}

-Operating Costs and Expenses [Abstract] {ID817}

-Research and Development Expense [Abstract] {ID818}

Research and Development Expense (Excluding Acquired in Process Cost) {ID819}

Research and Development Expense, Software (Excluding Acquired in Process Cost) {ID820}

Research and Development in Process {ID821}

Research and Development Asset Acquired Other than Through Business Combination, Written-off {ID822}

Research and Development Expense, Total {ID823}

-Depreciation, Depletion and Amortization, Nonproduction [Abstract] {ID824}

Depreciation, Nonproduction {ID825}

-Amortization of Deferred Charges [Abstract] {ID826}

Amortization of Acquisition Costs {ID827}

Amortization of Intangible Assets {ID828}

Amortization of Deferred Sales Commissions {ID829}

Amortization of Regulatory Asset {ID830}

Amortization of Financing Costs {ID831}

Amortization of Leased Asset {ID832}

Amortization of Deferred Leasing Fees {ID833}

Amortization of Power Contracts Emission Credits {ID834}

Amortization of Nuclear Fuel Lease {ID835}

Amortization of Advance Royalty {ID836}

Amortization of Deferred Property Taxes {ID837}

Amortization of Deferred Hedge Gains {ID838}

Other Amortization of Deferred Charges {ID839}

Amortization of Deferred Charges, Total {ID840}

Other Depreciation and Amortization {ID841}

Depletion, Nonproduction {ID842}

Depreciation, Depletion and Amortization, Nonproduction, Total {ID843}

Exploration Expense {ID844}

Carrying Costs, Property and Exploration Rights {ID845}

-Restructuring, Settlement and Impairment Provisions [Abstract] {ID846}

-Restructuring Charges [Abstract] {ID847}

Business Exit Costs {ID848}

Recapitalization Costs {ID849}

Severance Costs {ID850}

Other Restructuring Costs {ID851}

Restructuring Charges, Total {ID852}

Business Combination, Acquisition Related Costs {ID853}

Unsuccessful Business Combination Costs {ID854}

Defined Benefit Plan, Recognized Net (Gain) Loss Due to Settlements {ID855}

Inventory Recall Expense {ID856}

Gain on Business Interruption Insurance Recovery {ID857}

Environmental Remediation Expense {ID858}

Goodwill, Impairment Loss {ID859}

Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) {ID860}

-Asset Impairment Charges [Abstract] {ID861}

Impairment of Long-Lived Assets to be Disposed of {ID862}

Impairment of Long-Lived Assets Held-for-use {ID863}

Impairment of Real Estate {ID864}

Impairment of Retained Interest {ID865}

Impairment of Ongoing Project {ID866}

Impairment of Leasehold {ID867}

Impairment of Intangible Assets, Finite-lived {ID868}

Exploration Abandonment and Impairment Expense {ID869}

Impairment of Oil and Gas Properties {ID870}

Impairment Losses Related to Real Estate Partnerships {ID871}

Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down {ID872}

Other Asset Impairment Charges {ID873}

Asset Impairment Charges, Total {ID874}

-Other Nonrecurring (Income) Expense [Abstract] {ID875}

Other Nonrecurring Income {ID876}

Other Nonrecurring Expense {ID877}

Other Nonrecurring (Income) Expense, Total {ID878}

Gain (Loss) Related to Litigation Settlement {ID879}

Restructuring, Settlement and Impairment Provisions, Total {ID880}

Custody Fees {ID881}

Trustee Fees {ID882}

Sponsor Fees {ID883}

Royalty Expense {ID884}

Asset Retirement Obligation, Accretion Expense {ID885}

Accretion Expense {ID886}

Loan Portfolio Expense {ID887}

Pre-Opening Costs {ID888}

Legal Fees {ID889}

Malpractice Loss Contingency, Claims Incurred, Net {ID890}

Insurance Recoveries {ID891}

Other Cost and Expense, Operating {ID892}

Operating Costs and Expenses, Total {ID893}

-Selling, General and Administrative Expense [Abstract] {ID894}

-Selling and Marketing Expense [Abstract] {ID895}

Selling Expense {ID896}

Sales Commissions and Fees {ID897}

-Marketing and Advertising Expense [Abstract] {ID898}

Marketing Expense {ID899}

Advertising Expense {ID900}

Marketing and Advertising Expense, Total {ID901}

Product Warranty Expense {ID902}

Other Selling and Marketing Expense {ID903}

Selling and Marketing Expense, Total {ID904}

-General and Administrative Expense [Abstract] {ID905}

-Labor and Related Expense [Abstract] {ID906}

Salaries and Wages {ID907}

Officers' Compensation {ID908}

-Pension and Other Postretirement Benefit Expense [Abstract] {ID909}

Pension Expense {ID910}

Other Postretirement Benefit Expense {ID911}

Pension and Other Postretirement Benefit Expense, Total {ID912}

Allocated Share-based Compensation Expense {ID913}

Other Labor-related Expenses {ID914}

Labor and Related Expense, Total {ID915}

-Real Estate Taxes and Insurance [Abstract] {ID916}

Real Estate Tax Expense {ID917}

Real Estate Insurance {ID918}

Real Estate Taxes and Insurance, Total {ID919}

General Insurance Expense {ID920}

Communications and Information Technology {ID921}

Operating Leases, Rent Expense {ID922}

Travel and Entertainment Expense {ID923}

-Taxes, Miscellaneous [Abstract] {ID924}

Production Tax Expense {ID925}

Pump Taxes {ID926}

Taxes, Other {ID927}

Taxes, Miscellaneous, Total {ID928}

Other General and Administrative Expense {ID929}

General and Administrative Expense, Total {ID930}

Other Selling, General and Administrative Expense {ID931}

Provision for Doubtful Accounts {ID932}

-Gain (Loss) on Disposition of Assets [Abstract] {ID933}

Gain (Loss) on Sale of Oil and Gas Property {ID934}

Gain (Loss) on Sale of Timber Property {ID935}

Gain (Loss) on Disposition of Property {ID936}

Gain (Loss) on Disposition of Other Assets {ID937}

Gain (Loss) on Disposition of Assets, Total {ID938}

Other General Expense {ID939}

Operating Expenses, Total {ID940}

Other Operating Income {ID941}

Income (Loss) before interest, other income (expense) and income taxes {ID942}

Interest income, net {ID943}

Interest expense, net {ID944}

Gains (Losses) on Restructuring of Debt {ID945}

Debt extinguishment costs {ID946}

Other income (expense), net {ID947}

-Nonoperating Income (Expense) [Abstract] {ID948}

-Investment Income, Nonoperating [Abstract] {ID949}

-Nonoperating Gains (Losses) [Abstract] {ID950}

-Gain (Loss) on Investments [Abstract] {ID951}

-Marketable Securities, Gain (Loss) [Abstract] {ID952}

Marketable Securities, Unrealized Gain (Loss) {ID953}

Marketable Securities, Realized Gain (Loss) {ID954}

Marketable Securities, Gain (Loss), Total {ID955}

Cost-method Investments, Realized Gain (Loss) {ID956}

Gain (Loss) on Investments, Total {ID957}

Gain (Loss) on Disposition of Intangible Assets {ID958}

Gain (Loss) on Securitization of Financial Assets {ID959}

Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal {ID960}

Gain (Loss) on Sale of Stock in Subsidiary or Equity Method Investee {ID961}

Gain (Loss) on Sale of Previously Unissued Stock by Subsidiary or Equity Investee, Nonoperating Income {ID962}

Gain (Loss) on Sale of Interest in Projects {ID963}

Increase (Decrease) in Carrying Value of Assets Received as Consideration in Disposal of Business {ID964}

-Gain (Loss) on Derivative Instruments, Net, Pretax [Abstract] {ID965}

Gain (Loss) from Price Risk Management Activity {ID966}

Gain (Loss) on Oil and Gas Hedging Activity {ID967}

Increase (Decrease) in Fair Value of Unhedged Derivative Instruments {ID968}

Gain (Loss) on Derivative Instruments Held for Trading Purposes, Net {ID969}

Gain (Loss) on Derivative Instruments, Net, Pretax, Total {ID970}

Nonoperating Gains (Losses), Total {ID971}

Royalty Income, Nonoperating {ID972}

Rental Income, Nonoperating {ID973}

Development Profits, Nonoperating {ID974}

Recovery Stranded Costs {ID975}

Leveraged Leases, Income (Loss) {ID976}

Impairment of Investments {ID977}

-Investment Income, Net [Abstract] {ID978}

-Investment Income, Interest and Dividend [Abstract] {ID979}

Investment Income, Interest {ID980}

Investment Income, Dividend {ID981}

Investment Income, Interest and Dividend, Total {ID982}

-Investment Income, Net, Amortization of Discount and Premium [Abstract] {ID983}

Investment Income, Amortization of Discount {ID984}

Investment Income, Amortization of Premium {ID985}

Investment Income, Net, Amortization of Discount and Premium, Total {ID986}

Investment Income, Investment Expense {ID987}

Investment Income, Net, Total {ID988}

Investment Income, Nonoperating, Total {ID989}

Gain (Loss) on Contract Termination {ID990}

Gain (Loss) on Condemnation {ID991}

Loss from Catastrophes {ID992}

Public Utilities, Allowance for Funds Used During Construction, Additions {ID993}

Foreign Currency Transaction Gain (Loss), before Tax {ID994}

Provision for Other Losses {ID995}

Health Care Trust Fund, Investment Gains (Losses), Net {ID996}

Health Care Trust Fund, Administrative Expense {ID997}

Health Care Trust Fund, Interest Income {ID998}

-Other Nonoperating Income (Expense) [Abstract] {ID999}

Other Nonoperating Income {ID1000}

Other Nonoperating Expense {ID1001}

Nonoperating Income (Expense), Total {ID1002}

-Interest and Debt Expense [Abstract] {ID1003}

-Interest Expense [Abstract] {ID1004}

Interest Expense, Debt {ID1005}

Interest Expense, Customer Deposits {ID1006}

Debt Related Commitment Fees and Debt Issuance Costs {ID1007}

Interest Expense, Lessee, Assets under Capital Lease {ID1008}

Interest Expense, Other {ID1009}

Interest Expense, Total {ID1010}

-Gains (Losses) on Extinguishment of Debt [Abstract] {ID1011}

Gains (Losses) on Extinguishment of Debt, before Write off of Deferred Debt Issuance Cost {ID1012}

Write off of Deferred Debt Issuance Cost {ID1013}

Induced Conversion of Convertible Debt Expense {ID1014}

Gains (Losses) on Recourse Debt {ID1015}

Distributions on Mandatorily Redeemable Securities {ID1016}

Interest and Debt Expense, Total {ID1017}

Income before income tax provision {ID1018}

Income (Loss) from Equity Method Investments {ID1019}

Income tax provision {ID1020}

-Income Tax Expense (Benefit) [Abstract] {ID1021}

-Current Income Tax Expense (Benefit) [Abstract] {ID1022}

Current Federal Tax Expense (Benefit) {ID1023}

Current State and Local Tax Expense (Benefit) {ID1024}

Current Foreign Tax Expense (Benefit) {ID1025}

Current Income Tax Expense (Benefit), Total {ID1026}

-Deferred Income Tax Expense (Benefit) [Abstract] {ID1027}

Deferred Federal Income Tax Expense (Benefit) {ID1028}

Deferred State and Local Income Tax Expense (Benefit) {ID1029}

Deferred Foreign Income Tax Expense (Benefit) {ID1030}

Deferred Income Tax Expense (Benefit), Total {ID1031}

Other Tax Expense (Benefit) {ID1032}

Deferred Other Tax Expense (Benefit) {ID1033}

Tax Adjustments, Settlements, and Unusual Provisions {ID1034}

Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest, Total {ID1035}

-Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] {ID1036}

-Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax [Abstract] {ID1037}

Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax {ID1038}

Discontinued Operation, Tax Effect of Income (Loss) from Discontinued Operation During Phase-out Period {ID1039}

Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax, Total {ID1040}

-Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax [Abstract] {ID1041}

Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax {ID1042}

Discontinued Operation, Tax Effect of Income (Loss) from Disposal of Discontinued Operation {ID1043}

Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax, Total {ID1044}

-Discontinued Operation, Provision for Loss (Gain) on Disposal, Net of Tax [Abstract] {ID1045}

Discontinued Operation, Provision for Loss (Gain) on Disposal, before Income Tax {ID1046}

Discontinued Operation, Tax (Expense) Benefit from Provision for (Gain) Loss on Disposal {ID1047}

Discontinued Operation, Provision for Loss (Gain) on Disposal, Net of Tax, Total {ID1048}

-Discontinued Operation, Amount of Adjustment to Prior Period Gain (Loss) on Disposal, Net of Tax [Abstract] {ID1049}

Discontinued Operation, Amount of Adjustment to Prior Period Gain (Loss) on Disposal, before Income Tax {ID1050}

Discontinued Operation, Tax Effect of Adjustment to Prior Period Gain (Loss) on Disposal {ID1051}

-Discontinued Operation, Amount of Adjustment to Prior Period Gain (Loss) on Disposal, Net of Tax, Total {ID1052}

Discontinued Operation, Nature of Adjustment to Prior Period Gain (Loss) on Disposal {ID1053}

-Discontinued Operation, Amount of Other Income (Loss) from Disposition of Discontinued Operation, Net of Tax [Abstract] {ID1054}

Discontinued Operation, Amount of Other Income (Loss) from Disposition of Discontinued Operations, before Income Tax {ID1055}

Discontinued Operation, Tax Effect of Other Income (Loss) from Disposition of Discontinued Operation {ID1056}

-Discontinued Operation, Amount of Other Income (Loss) from Disposition of Discontinued Operation, Net of Tax, Total {ID1057}

Discontinued Operation, Nature of Other Income (Loss) from Disposition of Discontinued Operation {ID1058}

Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax {ID1059}

Discontinued Operation, Tax Effect of Discontinued Operation {ID1060}

Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total {ID1061}

Income (Loss) before Extraordinary Items and Cumulative Effect of Change in Accounting Principle, Total {ID1062}

-Extraordinary Item, Gain or Loss, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] {ID1063}

-Extraordinary Item, Gain or Loss, Gross [Abstract] {ID1064}

Gain on Purchase of Business {ID1065}

Gain (Loss) from Adjustments to Prior Period Extraordinary Items {ID1066}

Extraordinary Item of Investee {ID1067}

Discontinued Application of Specialized Accounting for Regulated Operations {ID1068}

Other Extraordinary Gain (Loss) {ID1069}

Extraordinary Item, Gain or Loss, Gross, Total {ID1070}

Tax Effect of Extraordinary Item, Gain or Loss {ID1071}

Extraordinary Item, Gain or Loss, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total {ID1072}

Income (Loss) before Cumulative Effect of Change in Accounting Principle, Total {ID1073}

-Cumulative Effect of Change in Accounting Principle Presented on Income Statement, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] {ID1074}

Cumulative Effect of Change in Accounting Principle Presented on Income Statement, before Tax {ID1075}

Cumulative Effect of Change in Accounting Principle Presented on Income Statement, Tax {ID1076}

Cumulative Effect of Change in Accounting Principle Presented on Income Statement, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total {ID1077}

Net income (loss) {ID1078}

Less: Net income attributable to noncontrolling interests {ID1079}

-Net Income (Loss) Attributable to Noncontrolling Interest [Abstract] {ID1080}

Net Income (Loss) Attributable to Noncontrolling Interest, Limited Partnerships {ID1081}

Net Income (Loss) Attributable to Noncontrolling Interest, Operating Partnerships {ID1082}

Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders {ID1083}

Net Income (Loss) Attributable to Noncontrolling Interest, Joint Venture Partners {ID1084}

Net Income (Loss) Attributable to Noncontrolling Interest, Other {ID1085}

Net income (loss) attributable to ATI {ID1086}

-Preferred Stock Dividends and Other Adjustments [Abstract] {ID1087}

Preferred Stock Dividends {ID1088}

Redeemable Preferred Stock Dividends {ID1089}

Convertible Preferred Stock Converted to Other Securities {ID1090}

Preferred Stock Redemption Premium {ID1091}

Preferred Stock Conversions, Inducements {ID1092}

Redeemable Preferred Stock Increase (Decrease) in Carrying Amount {ID1093}

General Partner Distributions {ID1094}

Other Preferred Stock Dividends and Adjustments {ID1095}

Preferred Stock Dividends and Other Adjustments, Total {ID1096}

Net Income (Loss) Available to Common Stockholders, Basic, Total {ID1097}

-Income Amounts Attributable to Parent, Disclosures [Abstract] {ID1098}

-Income (Loss) from Continuing Operations Attributable to Parent [Abstract] {ID1099}

Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest {ID1100}

Income (Loss) from Continuing Operations Attributable to Noncontrolling Interest {ID1101}

Income (Loss) from Continuing Operations Attributable to Parent, Total {ID1102}

-Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent [Abstract] {ID1103}

Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest {ID1104}

Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest {ID1105}

Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent, Total {ID1106}

-Extraordinary Item, Gain or Loss, Net of Tax, Attributable to Parent [Abstract] {ID1107}

Extraordinary Item, Gain or Loss, Net of Tax, Including Portion Attributable to Noncontrolling Interest {ID1108}

Extraordinary Item, Gain or Loss, Net of Tax, Attributable to Noncontrolling Interest {ID1109}

Extraordinary Item, Gain or Loss, Net of Tax, Attributable to Parent, Total {ID1110}

-Cumulative Effect of Change in Accounting Principle Presented on Income Statement, Net of Tax, Attributable to Parent [Abstract] {ID1111}

Cumulative Effect of Change in Accounting Principle Presented on Income Statement, Net of Tax, Including Portion Attributable to Noncontrolling Interest {ID1112}

Cumulative Effect of Change in Accounting Principle Presented on Income Statement, Net of Tax, Attributable to Noncontrolling Interest {ID1113}

Cumulative Effect of Change in Accounting Principle Presented on Income Statement, Net of Tax, Attributable to Parent, Total {ID1114}

Basic net income (loss) per common share attributable to ATI common stockholders {ID1115}

Diluted net income (loss) per common share attributable to ATI common stockholders {ID1116}

Dividends Declared Per Common Share {ID1117}

-Earnings Per Share [Abstract] {ID1118}

-Earnings Per Share, Basic [Abstract] {ID1119}

-Income (Loss) before Cumulative Effect of Change in Accounting Principle, Per Basic Share [Abstract] {ID1120}

-Income (Loss) before Extraordinary Items and Cumulative Effect of Change in Accounting Principle, Per Basic Share [Abstract] {ID1121}

Income (Loss) from Continuing Operations, Per Basic Share {ID1122}

Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share {ID1123}

Income (Loss) before Extraordinary Items and Cumulative Effect of Change in Accounting Principle, Per Basic Share, Total {ID1124}

Income (Loss) from Extraordinary Items, Net of Tax, Per Basic Share {ID1125}

Income (Loss) before Cumulative Effect of Change in Accounting Principle, Per Basic Share, Total {ID1126}

Cumulative Effect of Change in Accounting Principle, Net of Tax, Per Basic Share {ID1127}

-Earnings Per Share, Basic, Other Disclosures [Abstract] {ID1128}

Income (Loss) from Continuing Operations, Per Basic Share {ID1129}

Weighted Average Number of Shares Outstanding, Basic {ID1130}

-Earnings Per Share, Diluted [Abstract] {ID1131}

-Income (Loss) before Cumulative Effect of Change in Accounting Principle, Per Diluted Share [Abstract] {ID1132}

-Income (Loss) before Extraordinary Items and Cumulative Effect of Change in Accounting Principle, Per Diluted Share [Abstract] {ID1133}

Income (Loss) from Continuing Operations, Per Diluted Share {ID1134}

Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share {ID1135}

Income (Loss) before Extraordinary Items and Cumulative Effect of Change in Accounting Principle, Per Diluted Share, Total {ID1136}

Income (Loss) from Extraordinary Items, Net of Tax, Per Diluted Share {ID1137}

Income (Loss) before Cumulative Effect of Change in Accounting Principle, Per Diluted Share, Total {ID1138}

Cumulative Effect of Change in Accounting Principle, Net of Tax, Per Diluted Share {ID1139}

-Earnings Per Share, Diluted, Other Disclosures [Abstract] {ID1140}

Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount {ID1141}

Weighted Average Number of Shares Outstanding, Diluted {ID1142}

Weighted Average Number Diluted Shares Outstanding Adjustment {ID1143}

Common Stock, Dividends, Per Share, Cash Paid {ID1144}

-Partnership Income [Abstract] {ID1145}

Net Income (Loss) Allocated to General Partners {ID1146}

Net Income (Loss) Allocated to Limited Partners {ID1147}

-Net Income (Loss), Per Outstanding Limited Partnership Unit, Diluted, Other Disclosures [Abstract] {ID1148}

Antidilutive Securities Excluded from Computation of Net Income, Per Outstanding Unit, Amount {ID1149}

Weighted Average Limited Partnership Units Outstanding, Diluted {ID1150}

Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment {ID1151}

-Earnings Per Unit [Abstract] {ID1152}

-Net Income (Loss), Per Outstanding General Partnership Unit [Abstract] {ID1153}

-Income (Loss) before Extraordinary Items and Cumulative Effect of Change in Accounting Principle, Per Outstanding General Partnership Unit [Abstract] {ID1154}

Income (Loss) from Continuing Operations, Per Outstanding General Partnership Unit {ID1155}

Income (Loss) from Discontinued Operations, Net of Tax, Per Outstanding General Partnership Unit {ID1156}

Income (Loss) before Extraordinary Items and Cumulative Effect of Change in Accounting Principle, Per Outstanding General Partnership Unit, Total {ID1157}

Income (Loss) from Extraordinary Items, Net of Tax, Per Outstanding General Partnership Unit {ID1158}

Cumulative Effect of Change in Accounting Principle, Net of Tax, Per Outstanding General Partnership Unit {ID1159}

Net Income (Loss), Per Outstanding General Partnership Unit, Total {ID1160}

-Net Income (Loss), Per Outstanding General Partnership Unit, Other Disclosures [Abstract] {ID1161}

Distributions Per General Partnership Unit Outstanding {ID1162}

Weighted Average General Partnership Units Outstanding {ID1163}

-Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic [Abstract] {ID1164}

-Income (Loss) before Extraordinary Items and Cumulative Effect of Change in Accounting Principle, Per Outstanding Limited Partnership Unit, Basic [Abstract] {ID1165}

Income (Loss) from Continuing Operations, Per Outstanding Limited Partnership Unit, Basic {ID1166}

Income (Loss) from Discontinued Operations, Net of Tax, Per Outstanding Limited Partnership Unit, Basic {ID1167}

Income (Loss) before Extraordinary Items and Cumulative Effect of Change in Accounting Principle, Per Outstanding Limited Partnership Unit, Basic, Total {ID1168}

Income (Loss) from Extraordinary Items, Net of Tax, Per Outstanding Limited Partnership Unit, Basic {ID1169}

Cumulative Effect of Change in Accounting Principle, Net of Tax, Per Outstanding Limited Partnership Unit, Basic {ID1170}

Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic, Total {ID1171}

-Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic, Other Disclosures [Abstract] {ID1172}

Distributions Per Limited Partnership Unit Outstanding, Basic {ID1173}

Weighted Average Limited Partnership Units Outstanding, Basic {ID1174}

-Net Income (Loss), Per Outstanding Limited Partnership Unit, Diluted [Abstract] {ID1175}

-Income (Loss) before Cumulative Effect of Change in Accounting Principle, Per Outstanding Limited Partnership Unit, Diluted [Abstract] {ID1176}

-Income (Loss) before Extraordinary Items and Cumulative Effect of Change in Accounting Principle, Per Outstanding Limited Partnership Unit, Diluted [Abstract] {ID1177}

Income (Loss) from Continuing Operations, Per Outstanding Limited Partnership Unit, Diluted {ID1178}

Income (Loss) from Discontinued Operations, Net of Tax, Per Outstanding Limited Partnership Unit, Diluted {ID1179}

Income (Loss) before Extraordinary Items and Cumulative Effect of Change in Accounting Principle, Per Outstanding Limited Partnership Unit, Diluted, Total {ID1180}

Income (Loss) from Extraordinary Items, Net of Tax, Per Outstanding Limited Partnership Unit, Diluted {ID1181}

Income (Loss) before Cumulative Effect of Change in Accounting Principle, Per Outstanding Limited Partnership Unit, Diluted, Total {ID1182}

Cumulative Effect of Change in Accounting Principle, Net of Tax, Per Outstanding Limited Partnership Unit, Diluted {ID1183}

Net Income (Loss), Per Outstanding Limited Partnership Unit, Diluted, Total {ID1184}

-Net Income (Loss), Per Outstanding Limited Partnership Unit, Diluted, Other Disclosures [Abstract] {ID1185}

Antidilutive Securities Excluded from Computation of Net Income, Per Outstanding Unit, Amount {ID1186}

Weighted Average Limited Partnership Units Outstanding, Diluted {ID1187}

Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment {ID1188}

ALLEGHENY TECHNOLOGIES INCORPORATED XBRL Taxonomy Presentation Networks