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Pension and Postretirement Benefit Plans - Components of Net Periodic Benefit Cost and Other Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Non-operating expense |  |  |  |
Total net periodic benefit cost (benefit) | $ (65) | $ (80) | $ (199) | $ (239)
Postretirement Benefits |  |  |  |
Operating expense |  |  |  |
Service cost | 10 | 12 | 31 | 35
Non-operating expense |  |  |  |
Interest cost | 13 | 11 | 39 | 33
Expected return on plan assets | (17) | (19) | (52) | (58)
Amortization of transition asset | 0 | 0 | 0 | 0
Amortization of prior service benefit | (8) | (9) | (24) | (25)
Amortization of net actuarial loss | 10 | 14 | 30 | 42
Settlements, curtailments, special termination benefits and other | 0 | 0 | 2 | 2
Total non-operating expense (benefit) | (2) | (3) | (5) | (6)
Total net periodic benefit cost (benefit) | 8 | 9 | 26 | 29
UNITED STATES | Qualified and Non-qualified Pension Benefits |  |  |  |
Operating expense |  |  |  |
Service cost | 64 | 72 | 192 | 216
Non-operating expense |  |  |  |
Interest cost | 105 | 90 | 313 | 270
Expected return on plan assets | (241) | (264) | (723) | (792)
Amortization of transition asset | 0 | 0 | 0 | 0
Amortization of prior service benefit | (6) | (6) | (18) | (18)
Amortization of net actuarial loss | 106 | 132 | 318 | 396
Settlements, curtailments, special termination benefits and other | 0 | 0 | 0 | 0
Total non-operating expense (benefit) | (36) | (48) | (110) | (144)
Total net periodic benefit cost (benefit) | 28 | 24 | 82 | 72
International | Qualified and Non-qualified Pension Benefits |  |  |  |
Operating expense |  |  |  |
Service cost | 32 | 41 | 100 | 125
Non-operating expense |  |  |  |
Interest cost | 32 | 25 | 96 | 75
Expected return on plan assets | (69) | (81) | (211) | (244)
Amortization of transition asset | 0 | 1 | 1 | 2
Amortization of prior service benefit | 0 | 0 | 0 | (2)
Amortization of net actuarial loss | 10 | 26 | 30 | 80
Settlements, curtailments, special termination benefits and other | 0 | 0 | 0 | 0
Total non-operating expense (benefit) | (27) | (29) | (84) | (89)
Total net periodic benefit cost (benefit) | $ 5 | $ 12 | $ 16 | $ 36

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
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