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Property, Equipment and Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Property, Equipment and Intangible Assets [Abstract]      
Depreciation and amortization $ 65 $ 58 $ 50
Expected amortization expense, 2024 24    
Expected amortization expense, 2025 15    
Expected amortization expense, 2026 $ 4