PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Pension and Other Postretirement Benefits (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Jan. 04, 2021 |
Mar. 31, 2021 |
Mar. 31, 2020 |
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| Pension Plan | Ìý | Ìý | Ìý |
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | Ìý | Ìý | Ìý |
| Service cost | Ìý | $ 14 | $ 5 |
| Interest cost | Ìý | 26 | 8 |
| Expected return on plan assets | Ìý | (90) | (18) |
| Net actuarial loss | Ìý | 8 | 7 |
| Net periodic benefit cost (credit) | Ìý | (42) | 2 |
| Defined Benefit Pension Contributions | $ 118 | 146 | 4 |
| Other Postretirement Benefit Plans, Defined Benefit | Ìý | Ìý | Ìý |
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | Ìý | Ìý | Ìý |
| Service cost | Ìý | 13 | 1 |
| Interest cost | Ìý | 18 | 2 |
| Expected return on plan assets | Ìý | (10) | (5) |
| Prior service credits | Ìý | 0 | (1) |
| Net actuarial loss | Ìý | 1 | 1 |
| Net periodic benefit cost (credit) | Ìý | 22 | (2) |
| OPEB Contributions | Ìý | $ 0 | $ 0 |
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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/disclosureRef
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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/disclosureRef
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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/disclosureRef
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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 cost (reversal of cost) for other postretirement benefits. Excludes pension benefits. No definition available.
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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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