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v3.24.3

Retirement Benefits - Net Benefit Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Defined Contribution Plan Disclosure [Line Items] |  |  |  |
Service cost | $ 26 | $ 26 | $ 80 | $ 79
Interest cost | 113 | 118 | 340 | 352
Expected return on assets | (134) | (138) | (403) | (415)
Prior service (credit) cost | (1) | (2) | (4) | (5)
Actuarial (gain) loss | 22 | 9 | 69 | 25
Settlement charges | 3 | 0 | 7 | 0
Non-service components of pension benefits & OPEB (credit) cost | 3 | (13) | 9 | (43)
Net periodic benefit cost | 29 | 13 | 89 | 36
Pension Benefits |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |
Service cost | 22 | 22 | 67 | 67
Interest cost | 95 | 99 | 286 | 296
Expected return on assets | (123) | (127) | (371) | (381)
Prior service (credit) cost | 1 | 0 | 1 | 0
Actuarial (gain) loss | 25 | 12 | 76 | 35
Settlement charges | 3 | 0 | 7 | 0
Non-service components of pension benefits & OPEB (credit) cost | 1 | (16) | (1) | (50)
Net periodic benefit cost | 23 | 6 | 66 | 17
OPEB |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |
Service cost | 4 | 4 | 13 | 12
Interest cost | 18 | 19 | 54 | 56
Expected return on assets | (11) | (11) | (32) | (34)
Prior service (credit) cost | (2) | (2) | (5) | (5)
Actuarial (gain) loss | (3) | (3) | (7) | (10)
Settlement charges | 0 | 0 | 0 | 0
Non-service components of pension benefits & OPEB (credit) cost | 2 | 3 | 10 | 7
Net periodic benefit cost | 6 | 7 | 23 | 19
Pension Plan and Other Postretirement Benefits Plan |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |
Net periodic benefit cost | $ 24 | $ 24 | $ 74 | $ 71

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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/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-3A Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 + Details
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-3A Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h)(5) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(5) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 + Details
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