PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Pension and Other Postretirement Benefits (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2023 |
Jun. 30, 2022 |
Jun. 30, 2023 |
Jun. 30, 2022 |
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| Pension Plan | ||||
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | ||||
| Service cost | $ 8 | $ 12 | $ 16 | $ 24 |
| Interest cost | 58 | 31 | 117 | 63 |
| Expected return on plan assets | (78) | (92) | (157) | (184) |
| Prior service credits | 4 | 0 | 8 | 0 |
| Net actuarial loss (gain) | 1 | 3 | 2 | 7 |
| Net periodic benefit costs (credits) | (7) | (46) | (14) | (90) |
| Defined benefit pension contributions | 0 | 0 | 0 | 0 |
| Other Postretirement Benefit Plans, Defined Benefit | ||||
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | ||||
| Service cost | 3 | 10 | 5 | 21 |
| Interest cost | 16 | 20 | 32 | 40 |
| Expected return on plan assets | (10) | (9) | (21) | (19) |
| Prior service credits | (4) | 0 | (8) | 0 |
| Net actuarial loss (gain) | (37) | (3) | (73) | (6) |
| Net periodic benefit costs (credits) | (32) | 18 | (65) | 36 |
| OPEB contributions | $ 0 | $ 28 | $ 0 | $ 56 |
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of cash outflow for other postretirement benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes pension benefit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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