Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Narrative (Details)

v3.19.2
Income Taxes - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2019
Dec. 31, 2018
Investments, Owned, Federal Income Tax Note [Line Items]            
Income tax expense $ 76 $ 71 $ 157 $ 151    
Effective income tax rate percent 22.40% 19.40% 27.00% 20.60%    
Valuation allowance $ 88   $ 88     $ 66
Forecast            
Investments, Owned, Federal Income Tax Note [Line Items]            
Effective income tax rate percent         23.00%