Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details)

v3.6.0.2
Income Taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Expense (Benefit) [Abstract]      
Current Federal $ (40) $ (188) $ (155)
Current State and Local (12) (26) (32)
Current Foreign (73) (74) (110)
Current Income Tax Expense (Benefit) (125) (288) (297)
Deferred Federal (444) 74 76
Deferred State and Local (33) 21 (21)
Deferred Foreign 4 8 5
Deferred Income Tax Expense (Benefit) (473) 103 60
Income tax benefit (expense) (598) (185) (237)
Domestic 1,684 674 615
Foreign 168 142 160
Total 1,852 816 775
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]      
Computed expected tax benefit (expense) (649) (286) (271)
State and local income taxes, net of federal income taxes (26) (15) (6)
Foreign taxes, net of foreign tax credits (9) (4) (2)
Sale of consolidated subsidiary (1)   14
Impairment of intangibles not deductible for tax purposes     (3)
Dividends received deductions 9 51 6
Alternative energy tax credits 94 61 58
Change in valuation allowance affecting tax expense (16) 6 (2)
Impact of change in state rate on deferred taxes 1 (7) (26)
Other, net (1) 9 (5)
Components of Deferred Tax Assets and Liabilities [Abstract]      
Net operating and capital loss carryforwards 123 99  
Foreign tax credit carryforwards 134 72  
Accrued stock compensation 56 83  
Other accrued liabilities 118 165  
Other future deductible amounts 144 163  
Deferred tax assets 575 582  
Valuation allowance (64) (48)  
Net deferred tax assets 511 534  
Investments 1,057 598  
Intangible assets 1,540 1,788  
Discount on exchangeable debentures 1,404 1,148  
Deferred gain on debt retirements 129 193  
Other 17 24  
Deferred tax liabilities 4,147 3,751  
Deferred tax liabilities 3,636 3,217  
Valuation Allowance, Deferred Tax Asset, Change in Amount (16)    
Operating Loss Carryforwards, Valuation Allowance 60    
Deferred tax assets other, valuation allowance 4    
Income Tax Uncertainties [Abstract]      
Balance at beginning of year 104 136 124
Additions based on tax positions related to the current year 16 14 16
Additions for tax positions of prior years     20
Reductions for tax positions of prior years (26) (12) (3)
Lapse of statute and settlements (22) (34) (21)
Balance at end of year 72 104 136
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 50 $ 47 $ 68
Reasonably possible change in unrecognized tax benefit within 12 months 6    
Accrued interest and penalties related to uncertain tax positions $ 17