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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2025
Share-Based Payment Arrangement [Abstract] |
Summary of restricted stock activity under the Plan | A summary of restricted stock activity during the year ended December 31, 2025 is presented below.
| Restricted Stock Awards |  | Restricted Stock Units |  | Performance Restricted Stock Units
| Shares |  | Weighted- Average Grant-Date Fair Value |  | Shares |  | Weighted- Average Grant-Date Fair Value |  | Shares |  | Weighted- Average Grant-Date Fair Value
Outstanding as of December 31, 2024 | 23,367 |  |  | $ | 79.59 |  |  | 471,657 |  |  | $ | 79.36 |  |  | 272,000 |  |  | $ | 84.66 |
Granted | 24,033 |  |  | 81.98 |  |  | 262,093 |  |  | 85.66 |  |  | 152,390 |  |  | 87.60 |
Restrictions lapsed (vested)(1) | (23,367) |  |  | 79.59 |  |  | (197,545) |  |  | 78.15 |  |  | (141,616) |  |  | 85.25 |
Forfeited | — |  |  | — |  |  | (13,105) |  |  | 83.64 |  |  | (3,257) |  |  | 85.89 |
Outstanding as of December 31, 2025 | 24,033 |  |  | 81.98 |  |  | 523,100 |  |  | 82.86 |  |  | 279,517 |  |  | 85.95 |
_______________________________________________________________________________ (1)For performance restricted stock units, the shares represent the performance restricted stock units granted in 2022, for which the three-year performance period ended December 31, 2024.
Summary of selected amounts pertaining to restricted stock that vested | .
Summary of stock-based compensation costs and related income tax benefits | The following table summarizes stock-based compensation costs and related income tax benefits:
| Year ended December 31,
| 2025 |  | 2024 |  | 2023
| (in millions)
Stock-based compensation expense | $ | 45 |  |  | $ | 36 |  |  | $ | 37 |
Income tax benefit | (4) |  |  | (8) |  |  | (9) |
Stock-based compensation expense, net of income taxes | $ | 41 |  |  | $ | 28 |  |  | $ | 28 |

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- Definition Tabular disclosure of the amounts pertaining to restricted stock vested during the period. May include actual tax benefit realized and fair value of restricted stock vested. + References No definition available. + Details
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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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