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Employee Benefit Plans (Schedule of Defined Benefit Plan Disclosures) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan amendments |  |  | $ 2,100
Other | $ 65 | $ 23 | (51)
Fair value of plan assets | 47,960 | 63,323 |
Noncurrent liability | (4,807) | (7,855) |
Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Benefit obligations | 49,028 | 67,214 | 71,257
Service cost | 470 | 523 | 483
Interest cost | 1,520 | 1,249 | 1,650
Actuarial loss (gain) | (15,466) | (1,643) |
Total benefits paid(1) | (4,328) | (4,098) |
Net settlement, curtailment, and special termination benefits | 3 | (89) |
Plan amendments | 131 | 59 |
Business combinations and divestitures | 0 | 48 |
Other | (516) | (92) |
Fair value of plan assets | 47,960 | 63,323 | 62,318
Actual return on plan assets | (10,841) | 4,983 |
Employer contributions(1) | 306 | 289 |
Total benefits paid(1) | (4,328) | (4,098) |
Settlements | (4) | (85) |
Other (2) | (496) | (84) |
Funded status of plan | (1,068) | (3,891) |
Noncurrent assets | 3,301 | 3,214 |
Current liability | (236) | (232) |
Noncurrent liability | (4,133) | (6,873) |
Net amount recognized | (1,068) | (3,891) |
Net actuarial (gain) loss | 2,950 | 4,402 |
Prior service credit | (1,424) | (1,715) |
Net amount recognized | 1,526 | 2,687 |
Pension Plan [Member] | Continuing operations [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost | 470 | 523 |
Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Benefit obligations | 984 | 1,370 | 1,535
Service cost | 6 | 7 | 6
Interest cost | 29 | 24 | 37
Actuarial loss (gain) | (294) | (73) |
Total benefits paid(1) | (166) | (165) |
Net settlement, curtailment, and special termination benefits | (8) | (11) |
Plan amendments | 0 | 0 |
Business combinations and divestitures | 0 | 0 |
Other | 47 | 53 |
Fair value of plan assets | 302 | 389 | $ 381
Actual return on plan assets | (63) | 36 |
Employer contributions(1) | 98 | 95 |
Total benefits paid(1) | (166) | (165) |
Settlements | (8) | (11) |
Other (2) | 52 | 53 |
Funded status of plan | (682) | (981) |
Noncurrent assets | 0 | 0 |
Current liability | (71) | (78) |
Noncurrent liability | (611) | (903) |
Net amount recognized | (682) | (981) |
Net actuarial (gain) loss | (394) | (199) |
Prior service credit | (4) | (6) |
Net amount recognized | (398) | (205) |
Other Postretirement Benefits Plan [Member] | Continuing operations [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost | $ 6 | $ 7 |

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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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