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Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |
Activity related to self-insured property and casualty reserves | The following table summarizes the 2020 and 2019 activity related to our net self-insured property and casualty reserves as of December 31, 2020.
|  | Beginning Balance |  | Habit Acquisition(a) |  | Expense |  | Payments |  | Ending Balance
2020 Activity |  | $ | 54 |  |  | 6 |  |  | 13 |  |  | (23) |  |  | $ | 50 |
2019 Activity |  | $ | 66 |  |  | — |  |  | 9 |  |  | (21) |  |  | $ | 54 |

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