Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Operating Loss Carryforwards [Line Items]    
Decrease in valuation allowance $ (13)  
Impact of a multi-year reserve for deductions related to domestic production activities 28  
Unrecognized tax benefits that would impact effective tax rate 258  
Decrease in unrecognized tax benefits is reasonably possible 71  
Net interest expense related to uncertain tax positions 2 $ 5
Accrued interest and penalties for uncertain tax position 16 $ 14
Domestic Tax Authority    
Operating Loss Carryforwards [Line Items]    
Operating loss and tax credit carryforwards 13  
State and Local Jurisdiction    
Operating Loss Carryforwards [Line Items]    
Operating loss and tax credit carryforwards $ 48