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EMPLOYEE RETIREMENT PLANS - Amounts in Consolidated Balance Sheets (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Amounts in the company's consolidated balance sheets |  |
Accrued liabilities | $ (182) | $ (41)
Qualified |  |
Amounts in the company's consolidated balance sheets |  |
Other assets | 1 | 1
Accrued liabilities | (135) | (1)
Other liabilities | (121) | (254)
Total net liability | (255) | (254)
Non-Qualified |  |
Amounts in the company's consolidated balance sheets |  |
Other assets | 0 | 0
Accrued liabilities | (12) | (13)
Other liabilities | (150) | (148)
Total net liability | $ (162) | $ (161)

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