Annual report pursuant to Section 13 and 15(d)

Income Taxes - Effective Income Tax Rate, Tax Rate Reconciliation (Details)

v3.8.0.1
Income Taxes - Effective Income Tax Rate, Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]        
Tax cuts and jobs act of 2017 transition tax period   8 years    
Computed expected tax benefit (expense)   $ (289) $ (497) $ (160)
State and local income taxes, net of federal income taxes   (37) (46) (1)
Foreign income taxes, net of federal income taxes   88    
Dividends received deductions   38 11 2
Taxable dividends not recognized for book purposes   (45) (11)  
Federal tax credits   22 67  
Change in valuation allowance affecting tax expense   212 (1) (44)
Change in tax rate due to Tax Act   929    
Settlements with tax authorities   253    
Income Tax Reserves   (22)    
Non-Deductible Non-Taxable Interest   (60)    
Write-off of Tax attributes   (42)    
Other, net   16 (18) (7)
Income tax (expense) benefit   $ 1,063 $ (495) $ (210)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent   35.00%    
Forecast        
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]        
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00%