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EMPLOYEE RETIREMENT PLANS - Defined-benefit Pension Plans with an Accumulated Benefit Obligation in Excess of Plan Assets (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Qualified |  |
Information for the defined-benefit pension plans with an accumulated benefit obligation in excess of plan assets |  |
Projected benefit obligation | $ 174 | $ 1,100
Accumulated benefit obligation | 174 | 1,100
Fair value of plan assets | 94 | 844
Non-Qualified |  |
Information for the defined-benefit pension plans with an accumulated benefit obligation in excess of plan assets |  |
Projected benefit obligation | 148 | 162
Accumulated benefit obligation | 148 | 162
Fair value of plan assets | $ 0 | $ 0

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