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Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract] |
Activity related to self-insured property and casualty reserves | The following table summarizes the 2018 and 2017 activity related to our net self-insured property and casualty reserves as of December 31, 2018.
|  | Beginning Balance |  | Expense |  | Payments |  | Ending Balance
2018 Activity |  | $ | 84 |  |  | 11 |  |  | (29 | ) |  | $ | 66 |
2017 Activity |  | $ | 98 |  |  | 27 |  |  | (41 | ) |  | $ | 84 |

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