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Employee Benefit Plans (Net Periodic Benefit Costs and Other Changes Recognized in OCI) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Other changes in plan assets and benefit obligations recognized in OCI: |  |  |
Total recognized in OCI | $ (5) | $ 88 | $ (279)
Pension Benefits |  |  |
Net periodic benefit costs [Abstract] |  |  |
Service costs | 156 | 143 | 187
Interest costs | 460 | 474 | 328
Settlement and curtailment (gains) losses | 5 | 6 | 5
Expected return on plan assets | (460) | (480) | (516)
Amortization of net actuarial (gains) losses | 167 | 159 | 129
Amortization of prior service costs (credit) | (11) | (11) | (11)
Total net periodic benefit costs (credit) | 317 | 291 | 122
Other changes in plan assets and benefit obligations recognized in OCI: |  |  |
Net actuarial (gains) losses | 141 | 250 | 2
Prior service costs (credit) | 3 | 0 | 8
Amortization of net actuarial (gains) losses | (167) | (159) | (129)
Amortization of prior service (costs) credit | 11 | 11 | 11
Settlement and curtailment (gains) losses | (5) | (6) | (5)
Total recognized in OCI | (15) | 94 | (120)
Total recognized in net periodic benefit costs and OCI | 302 | 385 | 2
Pension Benefits | Accumulated Other Comprehensive Income (Loss) Foreign Currency Translation Adjustments |  |  |
Other changes in plan assets and benefit obligations recognized in OCI: |  |  |
Total recognized in OCI | 2 | (2) | (7)
Other Postretirement Benefits |  |  |
Net periodic benefit costs [Abstract] |  |  |
Service costs | 3 | 3 | 4
Interest costs | 40 | 43 | 34
Settlement and curtailment (gains) losses | 1 | 0 | 0
Expected return on plan assets | (56) | (54) | (55)
Amortization of net actuarial (gains) losses | (28) | (30) | (25)
Amortization of prior service costs (credit) | 0 | 0 | 0
Total net periodic benefit costs (credit) | (40) | (38) | (42)
Other changes in plan assets and benefit obligations recognized in OCI: |  |  |
Net actuarial (gains) losses | (20) | (41) | (191)
Prior service costs (credit) | 0 | 0 | 0
Amortization of net actuarial (gains) losses | 28 | 30 | 25
Amortization of prior service (costs) credit | 0 | 0 | 0
Settlement and curtailment (gains) losses | (1) | 0 | 0
Total recognized in OCI | 7 | (11) | (166)
Total recognized in net periodic benefit costs and OCI | (33) | (49) | (208)
Other Postretirement Benefits | Accumulated Other Comprehensive Income (Loss) Foreign Currency Translation Adjustments |  |  |
Other changes in plan assets and benefit obligations recognized in OCI: |  |  |
Total recognized in OCI | $ 0 | $ 0 | $ 0

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