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Employee Benefit Plans (Obligations and Funded Status) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Pension Benefits |  |  |
Change in benefit obligations: |  |  |
Benefit obligations at January 1, | $ 9,498 | $ 9,298 |
Service costs | 156 | 143 | $ 187
Interest costs | 460 | 474 | 328
Plan participants’ contributions | 0 | 0 |
Plan amendments | 3 | 0 |
Net actuarial (gains) losses | (281) | 299 |
Acquisition, divestitures, settlements and curtailments | (36) | (35) |
Benefits paid | (638) | (636) |
Effect of foreign currency translation | (85) | (45) |
Benefit obligations at December 31, | 9,077 | 9,498 | 9,298
Change in plan assets |  |  |
Estimated fair value of plan assets at January 1, | 8,270 | 8,294 |
Actual return on plan assets | 39 | 529 |
Acquisition, divestitures and settlements | (36) | (35) |
Plan participants’ contributions | 0 | 0 |
Employer contributions | 256 | 140 |
Benefits paid | (638) | (636) |
Effect of foreign currency translation | (55) | (22) |
Estimated fair value of plan assets at December 31, | 7,836 | 8,270 | 8,294
Over (under) funded status at December 31, | (1,241) | (1,228) |
Amounts recognized in the consolidated balance sheets |  |  |
Other assets | 132 | 229 |
Other liabilities | (1,373) | (1,457) |
Net amount recognized | (1,241) | (1,228) |
Accumulated other comprehensive (income) loss: |  |  |
Net actuarial (gains) losses | 2,331 | 2,360 |
Prior service costs (credit) | (11) | (25) |
AOCI, before income tax | 2,320 | 2,335 |
Accumulated benefit obligation | 8,969 | 9,377 |
Other Postretirement Benefits |  |  |
Change in benefit obligations: |  |  |
Benefit obligations at January 1, | 765 | 794 |
Service costs | 3 | 3 | 4
Interest costs | 40 | 43 | 34
Plan participants’ contributions | 29 | 30 |
Plan amendments | 0 | 0 |
Net actuarial (gains) losses | (16) | (23) |
Acquisition, divestitures, settlements and curtailments | (2) | 0 |
Benefits paid | (83) | (86) |
Effect of foreign currency translation | (6) | 4 |
Benefit obligations at December 31, | 730 | 765 | 794
Change in plan assets |  |  |
Estimated fair value of plan assets at January 1, | 1,334 | 1,303 |
Actual return on plan assets | 59 | 72 |
Acquisition, divestitures and settlements | (2) | 0 |
Plan participants’ contributions | 29 | 30 |
Employer contributions | (5) | 13 |
Benefits paid | (83) | (86) |
Effect of foreign currency translation | (3) | 2 |
Estimated fair value of plan assets at December 31, | 1,329 | 1,334 | $ 1,303
Over (under) funded status at December 31, | 599 | 569 |
Amounts recognized in the consolidated balance sheets |  |  |
Other assets | 907 | 886 |
Other liabilities | (308) | (317) |
Net amount recognized | 599 | 569 |
Accumulated other comprehensive (income) loss: |  |  |
Net actuarial (gains) losses | (502) | (509) |
Prior service costs (credit) | 0 | 0 |
AOCI, before income tax | (502) | (509) |
United States Pension Plan of US Entity, Non Qualified [Member] |  |  |
Change in benefit obligations: |  |  |
Benefit obligations at January 1, | 1,000 |  |
Benefit obligations at December 31, | 1,000 | 1,000 |
Changes to financial assumptions [Member] | Pension Benefits |  |  |
Change in benefit obligations: |  |  |
Net actuarial (gains) losses | 386 | (256) |
Changes to financial assumptions [Member] | Other Postretirement Benefits |  |  |
Change in benefit obligations: |  |  |
Net actuarial (gains) losses | 15 | (8) |
Changes to demographic assumptions [Member] | Pension Benefits |  |  |
Change in benefit obligations: |  |  |
Net actuarial (gains) losses | 2 | 54 |
Changes to demographic assumptions [Member] | Other Postretirement Benefits |  |  |
Change in benefit obligations: |  |  |
Net actuarial (gains) losses | 0 | 8 |
Changes to Plan Experience [Member] | Pension Benefits |  |  |
Change in benefit obligations: |  |  |
Net actuarial (gains) losses | (107) | (97) |
Changes to Plan Experience [Member] | Other Postretirement Benefits |  |  |
Change in benefit obligations: |  |  |
Net actuarial (gains) losses | $ 1 | $ 23 |

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