-Network: (100 - Condensed Consolidated Statements of Income)

-Income Statement [Abstract] {ID1}

-Statement [Table] {ID2}

-Statement [Line Items] {ID3}

-Revenues {ID4}

Coal revenues {ID5}

Freight and handling revenues {ID6}

Other revenues {ID7}

Total revenues {ID8}

-Costs and expenses {ID9}

Cost of Coal Sales (Exclusive of Items Shown Separately Below) {ID10}

Increase in fair value of derivative instruments, net {ID11}

Freight and handling costs {ID12}

Cost of other revenues {ID13}

Depreciation, depletion and amortization {ID14}

Selling, general and administrative expenses (exclusive of depreciation and amortization shown separately) {ID15}

Total costs and expenses {ID16}

Income from operations {ID17}

-Other income (expense) {ID18}

Interest expense {ID19}

Interest income {ID20}

Loss on early extinguishment of debt {ID21}

Miscellaneous income (expense), net {ID22}

Total other expense, net {ID23}

Income From Continuing Operations Before Income Taxes {ID24}

Income tax expense {ID25}

Income from continuing operations {ID26}

-Discontinued operations {ID27}

Loss from discontinued operations before income taxes {ID28}

Income tax benefit {ID29}

Loss from discontinued operations {ID30}

Net Income {ID31}

-Basic earnings per share {ID32}

Income from continuing operations {ID33}

Loss from discontinued operations {ID34}

Net income {ID35}

-Diluted earnings per share {ID36}

Income from continuing operations {ID37}

Loss from discontinued operations {ID38}

Net income {ID39}

-Network: (200 - Condensed Consolidated Balance Sheets)

-Statement of Financial Position [Abstract] {ID40}

-Statement [Table] {ID41}

-Statement [Line Items] {ID42}

-Assets {ID43}

-Current assets {ID44}

Cash and cash equivalents {ID45}

Trade accounts receivable, net {ID46}

Notes and other receivables {ID47}

Deferred income taxes {ID48}

Inventories {ID49}

Prepaid expenses and other current assets {ID50}

Total current assets {ID51}

Property, plant, and equipment, net {ID52}

Goodwill {ID53}

Other intangibles, net {ID54}

Deferred income taxes {ID55}

Other assets {ID56}

Total assets {ID57}

-Liabilities and Stockholders' Equity {ID58}

-Current liabilities {ID59}

Current portion of long-term debt {ID60}

Note payable {ID61}

Trade accounts payable {ID62}

Accrued expenses and other current liabilities {ID63}

Total current liabilities {ID64}

Long-term debt {ID65}

Workers' compensation benefit obligations {ID66}

Postretirement medical benefit obligations {ID67}

Asset retirement obligation {ID68}

Deferred gains on sale of property interests {ID69}

Other liabilities {ID70}

Total Liabilities {ID71}

Commitments and contingencies {ID72}

-Stockholders' equity {ID73}

Preferred stock - par value $0.01, 10,000,000 shares authorized, none issued {ID74}

Common stock - par value $0.01, 100,000,000 shares authorized, 71,468,407 issued and 71,361,470 outstanding at June 30, 2009 and 70,513,880 shares issued and outstanding at December 31, 2008 {ID75}

Additional paid-in capital {ID76}

Accumulated Other Comprehensive Loss {ID77}

Treasury stock, at cost: 106,937 and 0 shares at June 30, 2009 and December 31, 2008, respectively {ID78}

Retained Earnings {ID79}

Total Stockholders' Equity {ID80}

Total liabilities and stockholders' equity {ID81}

-Network: (210 - Parenthetical Data For Condensed Consolidated Balance Sheets )

-Statement of Financial Position [Abstract] {ID82}

-Statement [Table] {ID83}

-Statement [Line Items] {ID84}

-Liabilities and Stockholders' Equity {ID85}

-Stockholders' equity {ID86}

Preferred Stock par value {ID87}

Preferred stock - shares authorized {ID88}

Preferred stock - issued {ID89}

Common stock - par value {ID90}

Common stock - shares authorized {ID91}

Common stock - shares issued {ID92}

Common stock - outstanding {ID93}

Treasury stock, at cost: shares {ID94}

-Network: (400 - Condensed Consolidated Statements of Cash Flows )

-Statement of Cash Flows [Abstract] {ID95}

-Statement [Table] {ID96}

-Statement [Line Items] {ID97}

-Operating activities {ID98}

Net income {ID99}

-Adjustments to reconcile net income to net cash provided by operating activities {ID100}

Depreciation, depletion and amortization {ID101}

Amortization of debt issuance costs {ID102}

Accretion of asset retirement obligation {ID103}

Accretion of convertible debt discount {ID104}

Loss on early extinguishment of debt {ID105}

Share-based Compensation {ID106}

Amortization of deferred gains on sales of property interests {ID107}

Gain on sale of fixed assets and investments {ID108}

Change in fair value of derivative instruments {ID109}

Deferred income tax expense {ID110}

Other {ID111}

-Changes in operating assets and liabilities {ID112}

Trade accounts receivable {ID113}

Notes and other receivables {ID114}

Inventories {ID115}

Prepaid expenses and other current assets {ID116}

Other assets {ID117}

Trade accounts payable {ID118}

Accrued expenses and other current liabilities {ID119}

Workers’ compensation obligations {ID120}

Postretirement medical obligations {ID121}

Asset retirement obligation {ID122}

Other liabilities {ID123}

Net cash provided by operating activities {ID124}

-Investing activities {ID125}

Capital expenditures {ID126}

Proceeds from disposition of property, plant, and equipment {ID127}

Proceeds from sale of investment in coal terminal {ID128}

Investment in Dominion Terminal Facility {ID129}

Purchase of acquired companies {ID130}

Other {ID131}

Net cash used in investing activities {ID132}

-Financing activities {ID133}

Repayments of note payable {ID134}

Proceeds from issuance of convertible debt {ID135}

Repayments on long-term debt {ID136}

Proceeds from Issuance of Common Stock {ID137}

Debt issuance costs {ID138}

Premium payment on early extinguishment of debt {ID139}

Decrease in bank overdraft {ID140}

Tax benefit from share-based compensation {ID141}

Common stock repurchases {ID142}

Proceeds from exercise of stock options {ID143}

Other {ID144}

Net cash used in financing activities {ID145}

Net increase (decrease) in cash and cash equivalents {ID146}

Cash and cash equivalents at beginning of year {ID147}

Cash and cash equivalents at end of period {ID148}

-Network: (500 - Business and Basis of Presentation)

-Business and Basis of Presentation {ID149}

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] {ID150}

-Network: (510 - New Accounting Pronouncements)

-New Accounting Pronouncements {ID151}

New Accounting Pronouncements {ID152}

-Network: (520 - Earnings Per Share)

-Earnings Per Share {ID153}

Earnings Per Share {ID154}

-Network: (530 - Inventories)

-Inventories {ID155}

Inventories {ID156}

-Network: (540 - Income Taxes)

-Income Taxes {ID157}

Income Tax Disclosure [Text Block] {ID158}

-Network: (550 - Long-Term Debt)

-Long-Term Debt {ID159}

Long-Term Debt {ID160}

-Network: (560 - Asset Retirement Obligation)

-Asset Retirement Obligation {ID161}

Asset Retirement Obligation Disclosure [Text Block] {ID162}

-Network: (570 - Share-Based Compensation Awards)

-Share-Based Compensation Awards {ID163}

Share-Based Compensation Awards {ID164}

-Network: (580 - Derivative Financial Instruments)

-Derivative Financial Instruments {ID165}

Derivative Financial Instruments {ID166}

-Network: (590 - Fair Value of Financial Instruments and Fair Value Measurements)

-Fair Value Measurements {ID167}

Fair Value Measurements {ID168}

-Network: (600 - Postretirement Benefits Other Than Pensions)

-Postretirement Benefits Other Than Pensions {ID169}

Postretirement Benefits Other Than Pensions {ID170}

-Network: (610 - Comprehensive Income)

-Comprehensive Income {ID171}

Comprehensive Income {ID172}

-Network: (620 - Segment Information)

-Segment Information {ID173}

Segment Information {ID174}

-Network: (630 - Business Combinations)

-Business Combinations {ID175}

Business Combinations {ID176}

-Network: (640 - Discontinued Operations)

-Discontinued operations {ID177}

Discontinued operations {ID178}

-Network: (650 - Commitments and Contingencies)

-Commitments and Contingencies {ID179}

Commitments and Contingencies {ID180}

-Network: (660 - Subsequent Event(s))

-Subsequent Event(s) {ID181}

Subsequent Event(s) {ID182}

-Network: (670 - Merger With Foundation Coal Holdings Inc.)

-Merger with Foundation Coal Holdings, Inc. {ID183}

Merger with Foundation Coal Holdings, Inc. {ID184}

-Network: (995200 - Document - Document Information)

-Document Information [Text Block] {ID185}

-Document Information [Table] {ID186}

-Document Information, Document [Axis] {ID187}

Document [Domain] {ID188}

-Document Information [Line Items] {ID189}

Document Name {ID190}

Document Title {ID191}

Document Subtitle {ID192}

Document Synopsis {ID193}

Document Type {ID194}

Document Report Type {ID195}

Amendment Flag {ID196}

Amendment Description {ID197}

Document Description {ID198}

Document Creation Date {ID199}

Document Effective Date {ID200}

Document Period Start Date {ID201}

Document Period End Date {ID202}

Document Fiscal Year Focus {ID203}

Document Fiscal Period Focus {ID204}

Document Version {ID205}

Document Copyright Information {ID206}

Contained File Information, File Name {ID207}

Contained File Information, File Description {ID208}

Contained File Information, File Type {ID209}

Contained File Information, File Number {ID210}

-Network: (995400 - Document - Entity Information)

-Entity [Text Block] {ID211}

-Entities [Table] {ID212}

-Legal Entity [Axis] {ID213}

Entity [Domain] {ID214}

-Entity Information [Line Items] {ID215}

Entity Registrant Name {ID216}

Entity Central Index Key {ID217}

Entity Tax Identification Number {ID218}

Entity Data Universal Numbering System Number {ID219}

Entity Other Identification Type {ID220}

Entity Other Identification Value {ID221}

Entity Information, Current Legal or Registered Name {ID222}

Entity Information, Former Legal or Registered Name {ID223}

Entity Information, Date to Change Former Legal or Registered Name {ID224}

Entity Legal Form {ID225}

Entity Home Country ISO Code {ID226}

Parent Entity Legal Name {ID227}

Entity Accounting Standard {ID228}

Entity Reporting Currency ISO Code {ID229}

Entity Incorporation, State Country Name {ID230}

Entity Incorporation, Date of Incorporation {ID231}

Entity Number of Employees {ID232}

Current Fiscal Year End Date {ID233}

Former Fiscal Year End Date {ID234}

Entity Well-known Seasoned Issuer {ID235}

Entity Voluntary Filers {ID236}

Entity Current Reporting Status {ID237}

Entity Filer Category {ID238}

Entity Public Float {ID239}

Entity Common Stock, Shares Outstanding {ID240}

-Entity Sector Industry Classifications [Table] {ID241}

-Legal Entity [Axis] {ID242}

Entity [Domain] {ID243}

-Entity Sector Industry Classifications, Sector [Axis] {ID244}

Sector [Domain] {ID245}

-Entity Sector Industry Classifications [Line Items] {ID246}

Entity Sector Industry Classification, Primary {ID247}

-Entity North American Industry Classifications [Table] {ID248}

-Legal Entity [Axis] {ID249}

Entity [Domain] {ID250}

-Entity North American Industry Classifications, Industry [Axis] {ID251}

NAICS [Domain] {ID252}

-Entity North American Industry Classifications [Line Items] {ID253}

Entity North American Industry Classification, Primary {ID254}

-Entity Contact Personnel [Table] {ID255}

-Legal Entity [Axis] {ID256}

Entity [Domain] {ID257}

-Entity Contact Personnel, Contact Person Type [Axis] {ID258}

-Contact Person Type [Domain] {ID259}

Document Contact [Member] {ID260}

Legal Contact [Member] {ID261}

Business Contact [Member] {ID262}

Accounting Contact [Member] {ID263}

Investor Relations Contact [Member] {ID264}

Human Resources Contact [Member] {ID265}

-Entity Contact Personnel [Line Items] {ID266}

Contact Personnel Name {ID267}

Contact Personnel Email Address {ID268}

Contact Personnel Uniform Resource Locator (URL) {ID269}

-Entity Addresses [Table] {ID270}

-Legal Entity [Axis] {ID271}

Entity [Domain] {ID272}

-Entity Addresses, Address Type [Axis] {ID273}

-Address Type [Domain] {ID274}

Mailing Address [Member] {ID275}

Principal Address [Member] {ID276}

Other Address [Member] {ID277}

Legal Address [Member] {ID278}

Accounting Address [Member] {ID279}

Contact Address [Member] {ID280}

-Entity Addresses [Line Items] {ID281}

Entity Address, Address Description {ID282}

Entity Address, Address Line 1 {ID283}

Entity Address, Address Line 2 {ID284}

Entity Address, Address Line 3 {ID285}

Entity Address, City or Town {ID286}

Entity Address, State or Province {ID287}

Entity Address, Region {ID288}

Entity Address, Country {ID289}

Entity Address, Postal Zip Code {ID290}

-Entity Phone Fax Numbers [Table] {ID291}

-Legal Entity [Axis] {ID292}

Entity [Domain] {ID293}

-Entity Phone Fax Numbers, Phone Fax Number Type [Axis] {ID294}

-Phone Fax Number Type [Domain] {ID295}

Investor Relations Phone [Member] {ID296}

Investor Relations Fax [Member] {ID297}

General Phone [Member] {ID298}

General Fax [Member] {ID299}

Legal Phone [Member] {ID300}

Legal Fax [Member] {ID301}

Accounting Phone [Member] {ID302}

Accounting Fax [Member] {ID303}

Contact Phone [Member] {ID304}

Contact Fax [Member] {ID305}

-Entity Phone Fax Numbers [Line Items] {ID306}

Phone Fax Number Description {ID307}

Country Region {ID308}

City Area Code {ID309}

Local Phone Number {ID310}

Extension {ID311}

-Entity Listings [Table] {ID312}

-Legal Entity [Axis] {ID313}

Entity [Domain] {ID314}

-Entity Listings, Instrument [Axis] {ID315}

Instrument [Domain] {ID316}

-Entity Listings, Exchange [Axis] {ID317}

Exchange [Domain] {ID318}

-Entity Listings [Line Items] {ID319}

Trading Symbol {ID320}

Entity Listing, Primary {ID321}

Entity Listing, Foreign {ID322}

Entity Listing, Depository Receipt Ratio {ID323}

Entity Listing, Description {ID324}

Entity Listing, Security Trading Currency {ID325}

Entity Listing, Par Value Per Share {ID326}

-Entity Location [Table] {ID327}

-Legal Entity [Axis] {ID328}

Entity [Domain] {ID329}

-Entity by Location [Axis] {ID330}

Location [Domain] {ID331}

-Entity Location [Line Items] {ID332}

Entity Location, Primary {ID333}

Alpha Natural Resources, Inc. XBRL Taxonomy Presentation Networks