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INVESTMENTS AND RESTRICTED CASH - Additional Information (Detail) | Jun. 30, 2019 USD ($) | Dec. 31, 2018 USD ($) | Jun. 30, 2018 USD ($)
--- | --- | --- | ---
Gain (Loss) on Securities [Line Items] |  |  |
Investments and Restricted Cash | $ 168,000,000 | $ 170,000,000 |
Fair value of unobservable assets measured on a recurring basis | 1,000,000 | 2,000,000 |
Transfer between level 1 and level 2 | 0 |  | $ 0
cash held in escrow [Member] |  |  |
Gain (Loss) on Securities [Line Items] |  |  |
Restricted Cash and Cash Equivalents, Noncurrent | 3,000,000 | 9,000,000 |
Self-insurance requirements [Member] |  |  |
Gain (Loss) on Securities [Line Items] |  |  |
Investments and Restricted Cash | 144,000,000 | 142,000,000 |
Variable life insurance policy |  |  |
Gain (Loss) on Securities [Line Items] |  |  |
Investments and Restricted Cash | $ 20,000,000 | $ 19,000,000 |
Discount Rate |  |  |
Gain (Loss) on Securities [Line Items] |  |  |
Investments, measurement input | 0.0745 | 0.0816 |

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