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Stock Compensation Plans - Stock-based Compensation Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Share-Based Payment Arrangement [Abstract] |  |  |  |
Restricted stock units | $ 8 | $ 11 | $ 16 | $ 21
Employee stock purchase plan | 1 | 1 | 2 | 2
Stock-based compensation expense | 9 | 12 | 18 | 23
Tax expense (benefit) | (1) | 1 | 1 | 0
Stock-based compensation expense (net of tax) | $ 8 | $ 13 | $ 19 | $ 23

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