Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details)

v3.8.0.1
Income Taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Expense (Benefit) [Abstract]          
Current Federal     $ (61) $ (40) $ (188)
Current State and Local     (23) (12) (26)
Current Foreign     (88) (73) (74)
Current Income Tax Expense (Benefit)     (172) (125) (288)
Deferred Federal     1,266 (444) 74
Deferred State and Local     (130) (33) 21
Deferred Foreign       4 8
Deferred Income Tax Expense (Benefit)     1,136 (473) 103
Income tax benefit (expense)     964 (598) (185)
Domestic     1,314 1,684 674
Foreign     209 168 142
Earnings (loss) before income taxes     $ 1,523 1,852 816
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]          
Transition tax payment period     8 years    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 35.00% 21.00%      
Computed expected tax benefit (expense)     $ (533) (649) (286)
State and local income taxes, net of federal income taxes     (26) (26) (15)
Foreign taxes, net of foreign tax credits     (32) (9) (5)
Dividends received deductions     10 9 51
Alternative energy tax credits     85 94 61
Change in valuation allowance affecting tax expense     (101) (16) 6
Change in tax rate - U.S. tax reform     1,485    
Impact of change in state rate on deferred taxes     (84) 1 (7)
Consolidation of equity investment     138    
Other, net     22 (2) 10
Components of Deferred Tax Assets and Liabilities [Abstract]          
Net operating and capital loss carryforwards $ 160   160 123  
Foreign tax credit carryforwards 98   98 134  
Accrued stock compensation 51   51 56  
Other accrued liabilities 19   19 118  
Other future deductible amounts 190   190 144  
Deferred tax assets 518   518 575  
Valuation allowance (165)   (165) (64)  
Net deferred tax assets 353   353 511  
Investments 903   903 1,057  
Intangible assets 1,188   1,188 1,540  
Discount on exchangeable debentures 981   981 1,404  
Deferred gain on debt retirements 43   43 129  
Other 41   41 17  
Deferred tax liabilities 3,156   3,156 4,147  
Deferred tax liabilities 2,803   2,803 3,636  
Valuation Allowance, Deferred Tax Asset, Change in Amount     (101)    
Federal business tax credits 31        
Operating Loss Carryforwards, Valuation Allowance 67   67    
Income Tax Uncertainties [Abstract]          
Balance at beginning of year   $ 71 72 104 136
Additions based on tax positions related to the current year     10 16 14
Additions for tax positions of prior years     4    
Reductions for tax positions of prior years       (26) (12)
Lapse of statute and settlements     (15) (22) (34)
Balance at end of year 71   71 72 104
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 60   60 50 47
Reasonably possible change in unrecognized tax benefit within 12 months 3   3    
Accrued interest and penalties related to uncertain tax positions $ 17   $ 17 $ 17 $ 17