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EMPLOYEE RETIREMENT PLANS - Net Periodic Pension Cost for Defined-benefit Pension Plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Net periodic pension cost for the company's defined-benefit pension plans |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other, net | Other, net | Other, net
Qualified |  |  |
Net periodic pension cost for the company's defined-benefit pension plans |  |  |
Service cost | $ 2 | $ 3 | $ 4
Interest cost | 4 | 2 | 15
Expected return on plan assets | (4) | (3) | (9)
Settlement loss | 0 | 0 | 404
Recognized net loss | 0 | 3 | 14
Recognized prior service cost | 0 | 1 | 1
Net periodic pension cost | 3 | 6 | 429
Non-Qualified |  |  |
Net periodic pension cost for the company's defined-benefit pension plans |  |  |
Service cost | 0 | 0 | 0
Interest cost | 6 | 3 | 4
Expected return on plan assets | 0 | 0 | 0
Settlement loss | 0 | 0 | 0
Recognized net loss | 1 | 3 | 2
Recognized prior service cost | 0 | 0 | 0
Net periodic pension cost | $ 7 | $ 6 | $ 6

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