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Property, Equipment and Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Equipment and Intangible Assets [Abstract]      
Depreciation and amortization $ 50 $ 42 $ 31
Expected amortization expense, 2022 24    
Expected amortization expense, 2023 15    
Expected amortization expense, 2024 6    
Expected amortization expense, 2025 $ 1