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Commitments and Contingencies (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Commitments and Contingencies. |  |
Insurance claims receivable | $ 111 | $ 127
Insurance reserves |  |
Insurance reserves, beginning balance | 712 | 729
Self-insurance expense | 243 | 201
Cash paid and other | (231) | (218)
Assumed liabilities from acquisitions | 74 |
Insurance reserves, ending balance | 798 | 712
Insurance reserve, current portion | 211 | 175
Insurance reserve, long-term portion | $ 587 | $ 537
Expected timing for cash settlement | 6 years |

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