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Stock-Based Compensation (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Stock-Based Compensation [Abstract]        
Stock-based compensation expense $ 8 $ 6 $ 13 $ 12
Stock-based compensation expense, net of tax 7 $ 4 11 $ 10
Total unrecognized compensation costs related to non-vested stock options, restricted share units and performance shares $ 49   $ 49  
Weighted-average period of recognition of stock-based compensation cost     2 years 11 months 12 days