Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0001163302 (http://www.sec.gov/CIK)

Income Tax Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Income Tax Disclosure [Abstract]
Provisions (Benefits) for Income Taxes	Provision for income taxes     2016   2015   2014 (In millions)   Current   Deferred   Total   Current   Deferred   Total   Current   Deferred   Total Federal   $ (18 )   $ —   $ (18 )   $ (29 )   $ 168   $ 139   $ —   $ 80   $ 80 State and local   1   —   1   (5 )   33   28   (9 )   (29 )   (38 ) Foreign   32   9   41   4   12   16   1   25   26 Total   $ 15   $ 9   $ 24   $ (30 )   $ 213   $ 183   $ (8 )   $ 76   $ 68
Reconciliation of Federal Statutory Tax to Total Provisions	A reconciliation of the federal statutory tax rate of 35 percent to total provision follows: (In millions)   2016   2015   2014 Statutory rate applied to earnings (loss) before income taxes   $ (146 )   $ (511 )   $ 59 Valuation allowance   252   804   — Excess percentage depletion   (49 )   (49 )   (99 ) State and local income taxes after federal income tax effects   (20 )   (42 )   (25 ) Adjustments of prior years’ federal income taxes   (6 )   (23 )   (10 ) Tax credits   (39 )   (7 )   (4 ) Effects of foreign operations   36   5   25 Loss on deconsolidation of USSC   —   —   116 Alternative minimum tax credit refund   (18 )   —   — Other   14   6   6 Total provision   $ 24   $ 183   $ 68
Reconciliation of Unrecognized Tax Benefits	A tabular reconciliation of unrecognized tax benefits follows: (In millions)   2016   2015   2014 Unrecognized tax benefits, beginning of year   $ 74   $ 112   $ 127 Increases – tax positions taken in prior years   —   —   — Decreases – tax positions taken in prior years   (4 )   (5 )   (7 ) Increases – current tax positions   3   —   1 Settlements   —   (26 )   — Lapse of statute of limitations   (1 )   (7 )   (9 ) Unrecognized tax benefits, end of year   $ 72   $ 74   $ 112
Deferred Tax Assets and Liabilities	Deferred tax assets and liabilities resulted from the following:     December 31, (In millions)   2016   2015 Deferred tax assets:         Federal tax loss carryforwards (expiring in 2033 through 2036)   $ 754   $ 466 State tax credit carryforwards (expiring in 2018 through 2030)   15   11 State tax loss carryforwards (expiring in 2018 through 2036)   110   60 Minimum tax credit carryforwards   109   128 General business credit carryforwards (expiring in 2025 through 2036)   85   77 Foreign tax loss and credit carryforwards (expiring in 2017 through 2023)   51   16 Employee benefits   633   623 Receivables, payables and debt   5   33 Future reduction of foreign tax credits   1   — Expected federal benefit for deducting state deferred income taxes   —   2 Inventory   —   123 Contingencies and accrued liabilities   97   95 Investments in subsidiaries and equity investees   211   259 Valuation allowance   (1,113 )   (808 ) Total deferred tax assets   958   1,085 Deferred tax liabilities:         Property, plant and equipment   899   1,035 Inventory   23   — Future reduction of foreign tax credits   —   6 Expected federal benefit for deducting state deferred income taxes   9   — Indefinite-lived intangible assets   28   29 Other temporary differences   21   29 Total deferred tax liabilities   980   1,099 Net deferred tax liability   $ (22 )   $ (14 )