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Stock Compensation Plans - Stock-Based Compensation Expense and Related Tax Benefits (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | $ 33 | $ 26 | $ 52 | $ 45
Less: Tax benefit | (9) | (5) | (13) | (9)
Total stock-based compensation expense, after tax | 24 | 21 | 39 | 36
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | 105 |  | 105 |
Equity-based awards |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | 32 | 25 | 51 | 43
Liability-based awards |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | $ 1 | $ 1 | $ 1 | $ 2

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