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EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Retirement Benefits [Abstract] |  |
Defined benefit plans | $ 25 | $ 22
Defined contribution plans | 30 | 25
Multi-employer pension plans | $ 5 | $ 5

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