Retirement Benefits - Changes in Plan Assets Recognized in AOCI (Details) - USD ($) $ in Millions |
12 Months Ended | |
---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
|
Pension Benefits | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Separation-related adjustment | $ 0 | $ 2,664 |
Current year actuarial (gain) loss | 509 | 11 |
Amortization of actuarial (loss) gain | (46) | (134) |
Amortization of prior service (cost) credit | (1) | (1) |
Settlements | 0 | (6) |
Total recognized in AOCI | 462 | 2,534 |
Prior service (credit) cost | 9 | 10 |
Actuarial (gain) loss | 2,985 | 2,524 |
Total | 2,994 | 2,534 |
OPEB | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Separation-related adjustment | 0 | 22 |
Current year actuarial (gain) loss | 94 | (253) |
Amortization of actuarial (loss) gain | 14 | 1 |
Amortization of prior service (cost) credit | 6 | 7 |
Settlements | 0 | 0 |
Total recognized in AOCI | 114 | (223) |
Prior service (credit) cost | (24) | (30) |
Actuarial (gain) loss | (85) | (193) |
Total | $ (109) | $ (223) |
X | ||||||||||
- Definition Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax, Current No definition available.
|
X | ||||||||||
- Definition Other Comprehensive Income (Loss), Defined Benefit Plan, Transfer to Parent Company Due to Split No definition available.
|
X | ||||||||||
- Definition Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Amount, after tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Amount, after tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- 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.
|
X | ||||||||||
- Definition Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Amount, before tax, of increase (decrease) to other comprehensive income from settlement and curtailment gain (loss) of defined benefit plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|