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Share-Based Compensation - Summary of Activity Under Share-Based Compensation Plans (Parenthetical) (Detail) - shares | 9 Months Ended |
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Sep. 30, 2025 | Dec. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Outstanding SARs | 3,900,000 | 4,000,000
Performance condition SARs [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share Based Compensation Arrangement By Share Based Payment Award Stock Appreciation Rights Vested And Expected | 500,000 |
Forfeited SARs | 100,000 |
Exercisable SARs | 500,000 |
Performance condition SARs [Member] | Minimum [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of shares, granted during period | 100,000 |
Performance Based Stock Unit Awards [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of shares, granted during period | 1,600,000 |
Number of Shares, Expected to Vest | 1,200,000 |
Performance Based Stock Unit Awards [Member] | Maximum [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of share based payment awards other than options outstanding and nonvested that can vest maximum | 1,600,000 | 0

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- Definition Line items represent financial concepts included in a table. 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