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v3.23.3

Employee Benefit Plans (Net Periodic Benefit Cost (Credit)) (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | $ 24 | $ 35 | $ 72 | $ 106
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense)
Interest cost | $ 111 | $ 83 | $ 332 | $ 250
Expected return on plan assets | (216) | (221) | (648) | (667)
Amortization of net actuarial (gain) loss |  | 39 |  | 119
Net periodic benefit (credit) cost | (81) | (64) | (244) | (192)
Other Postretirement Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | $ 3 | $ 5 | $ 10 | $ 16
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense)
Interest cost | $ 15 | $ 11 | $ 46 | $ 34
Expected return on plan assets | (37) | (47) | (113) | (143)
Amortization of prior service cost (credit) | (10) | (10) | (28) | (29)
Amortization of net actuarial (gain) loss | (1) |  | (4) | (1)
Settlements and curtailment |  | (8) |  | (8)
Net periodic benefit (credit) cost | $ (30) | $ (49) | $ (89) | $ (131)

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