XML 108 R95.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stock-based Compensation Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation     $ 5 $ 7 $ 6
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized     4,687,500    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant     3,075,440    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid     $ 1 0 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value     4 6 5
Adjustments Related to Tax Withholding for Share-based Compensation     2 $ 3 $ 2
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized     $ 6    
Stock-based Compensation, Attainment of Performance Goals That Allows Vesting     89.90% 97.80% 106.60%
Stock-based Compensation, Forfeiture Rate     5.00%    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount     $ 0 $ 0 $ 0
stock based compensation impact on cash flows     $ 0 $ 0 $ 0
Performance based stock award percentage - minimum     0.00%    
Performance based stock award percentage - maximum     150.00%    
Subsequent Event [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation $ 2 $ 4