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

Reporting Entity [Axis]

0001373835 (http://www.sec.gov/CIK)

Income Tax Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Income Tax Disclosure [Abstract]
Income Tax Expense Components	Income Tax Expense Components   2016   2015   2014   (in millions) Current income taxes           Federal $ (1 )   $ —   $ 1 State (8 )   13   3 Foreign 27   60   (10 ) Total current income taxes 18   73   (6 ) Deferred income taxes           Federal 258   145   335 State (20 )   (18 )   (17 ) Foreign (40 )   (39 )   70 Total deferred income taxes 198   88   388 Total income tax expense $ 216   $ 161   $ 382
Earnings from Continuing Operations before Income Taxes	Earnings before Income Taxes   2016   2015   2014   (in millions) Domestic $ 1,010   $ 636   $ 1,108 Foreign 226   (15 )   557 Total earnings before income taxes $ 1,236   $ 621   $ 1,665
Reconciliation of Income Tax Expense at U.S. Federal Statutory Tax Rate to Actual Income Tax Expense from Continuing Operations	Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to Actual Income Tax Expense   2016   2015   2014   (in millions) Income tax expense, computed at the statutory rate of 35% $ 433   $ 217   $ 583 State income tax, net of federal income tax effect 17   12   25 Tax differential on foreign earnings (71 )   (44 )   (125 ) Noncontrolling interests (114 )   (92 )   (70 ) Valuation allowance (11 )   1   2 Goodwill impairment —   91   — Revaluation of accumulated deferred state taxes (18 )   (12 )   (25 ) Other items, net (20 )   (12 )   (8 ) Total income tax expense $ 216   $ 161   $ 382 Effective tax rate 17.5 %   25.9 %   22.9 %
Net Deferred Income Tax Liability Components	Net Deferred Income Tax Liability Components   December 31, 2016   2015 (in millions) Deferred credits and other liabilities $ 279   $ 275 Net operating loss carryforward 256   295 Other 45   36 Total deferred income tax assets 580   606 Valuation allowance (16 )   (27 ) Net deferred income tax assets 564   579 Investments and other assets (1,516 )   (1,605 ) Accelerated depreciation rates (4,428 )   (4,035 ) Regulatory assets and deferred debits (389 )   (384 ) Total deferred income tax liabilities (6,333 )   (6,024 ) Total net deferred income tax liabilities (a) $ (5,769 )   $ (5,445 )
Reconciliation of Gross Unrecognized Income Tax Benefits	Reconciliation of Gross Unrecognized Income Tax Benefits   2016   2015   2014   (in millions) Balance at beginning of period $ 82   $ 50   $ 76 Increases related to prior year tax positions 15   10   10 Decreases related to prior year tax positions (2 )   (1 )   (6 ) Increases related to current year tax positions 1   30   1 Lapse of statute of limitations (22 )   (4 )   (30 ) Foreign currency translation 1   (3 )   (1 ) Balance at end of period $ 75   $ 82   $ 50