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Self-Insurance Reserves | 12 Months Ended
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Dec. 31, 2024
Self-Insurance Reserves [Abstract] |
Self-Insurance Reserves | Self-Insurance Reserves To provide for the potential liabilities for certain risks, we use a combination of insurance and self-insurance mechanisms, including a consolidated, wholly-owned captive insurance subsidiary which provides insurance coverage for workers' compensation and automotive liability claim payments that are below our deductibles under our third-party policies. The activity related to our captive insurance subsidiary was not material for the years ended December 31, 2024, 2023, and 2022. Total self-insurance reserves were $144 million and $136 million, of which $79 million and $73 million were classified as current, as of December 31, 2024 and 2023, respectively. We had outstanding letters of credit of $114 million and $110 million, of which $79 million and $74 million were to guarantee self-insurance claims payments at December 31, 2024 and 2023, respectively. While we do not expect the amounts ultimately paid to differ significantly from the estimates, the insurance reserves and corresponding expenses could be affected if future claims experience differs significantly from historical trends and assumptions.

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