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BENEFIT PLANS - PENSION BENEFITS AND OTHER POSTRETIREMENT BENEFITS RECOGNIZED IN THE ACCOMPANYING CONSOLIDATED BALANCE SHEETS (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Retirement Benefits [Abstract] |  |
Deferred tax asset | $ 49 | $ 40
Total assets | 49 | 40
Current liabilities | (10) | (9)
Other noncurrent liabilities | (452) | (384)
Deferred tax liability | (1) | (1)
Total liabilities | (463) | (394)
Accumulated other comprehensive income | 139 | 113
Net amount recognized | $ (275) | $ (241)

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