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Commitments and Contingencies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Commitments and Contingencies. |
Changes to Gross Insurance Liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024(a) |  | 2023
Balance as of January 1 | ​ | $ | 712 | ​ | $ | 729
Self-insurance expense | ​ |  | 243 | ​ |  | 201
Cash paid and other | ​ | ​ | (231) | ​ | ​ | (218)
Assumed liabilities from acquisitions | ​ | ​ | 74 | ​ | ​ | —
Balance as of December 31 | ​ | $ | 798 | ​ | $ | 712
Current portion as of December 31 | ​ | $ | 211 | ​ | $ | 175
Long-term portion as of December 31 | ​ | $ | 587 | ​ | $ | 537
(a) | Based on current estimates, we anticipate that most of our insurance reserves will be settled in cash over the next six years.

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- Definition Tabular disclosure of the gross changes to the insurance liability. + References No definition available. + Details
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