Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Unrecognized Tax Benefits [Roll Forward] | |||||
| Balance at January 1 | $ 461.0 | [1] | $ 588.0 | ||
| Decreases for positions taken in prior years | (67.0) | (133.0) | |||
| Increases for positions taken in prior years | 19.0 | 131.0 | |||
| Increases for positions related to the current year | 46.0 | 47.0 | |||
| Settlements with taxing authorities | (31.0) | (172.0) | |||
| Lapsing of statutes of limitations | (14.0) | 0.0 | |||
| Balance at December 31 | [1] | 414.0 | 461.0 | ||
| Long-term income taxes | |||||
| Unrecognized Tax Benefits [Roll Forward] | |||||
| Balance at January 1 | 421.0 | ||||
| Balance at December 31 | 353.0 | 421.0 | |||
| Prepaid expenses and other current assets | |||||
| Unrecognized Tax Benefits [Roll Forward] | |||||
| Balance at January 1 | 40.0 | ||||
| Balance at December 31 | $ 62.0 | $ 40.0 | |||
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