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Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Income Taxes [Line Items]        
Unrecognized benefit that would affect the effective tax rate $ 1   $ 1  
Amount of interest and penalties included in liabilities for uncertain tax positions $ 1   $ 1  
Effective income tax rate (165.70%) 2.00% 209.60% (1.20%)
Income tax refund   $ 3 $ 2 $ 3
Income taxes paid $ 1      
Federal | Tax Year 2014        
Income Taxes [Line Items]        
Open tax year     2014  
Federal | Tax Year 2015        
Income Taxes [Line Items]        
Open tax year     2015