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Employee Stock-based Compensation Plans - Employee Purchases and Aggregate Cost (Details) - Employee Stock Puchase Program - USD ($) shares in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Equity, Class of Treasury Stock [Line Items] |  |  |
Employee stock purchases (in shares) | 0.4 | 0.4 | 0.4
Aggregate cost | $ 12 | $ 13 | $ 12

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