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Stock-based Compensation (Summary of Restricted Stock Awards Vested) (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Share-Based Payment Arrangement, Noncash Expense [Abstract]      
Total shares vested 1.0 1.0 1.0
Fair value on vesting date $ 102 $ 92 $ 187