Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Details)

v3.20.1
Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Operating Loss Carryforwards [Line Items]        
Income tax expense $ (80) $ (81)    
Effective income tax rate percent 21.40% 33.30%    
Valuation allowance $ 70     $ 70
Forecast        
Operating Loss Carryforwards [Line Items]        
Effective income tax rate percent     23.00%