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v3.25.2

Employee Benefit Plans (Components of Provision for Net Periodic Benefit (Credit) Cost) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | $ 19 | $ 22 | $ 38 | $ 44
Interest cost | 109 | 108 | 217 | 217
Expected return on plan assets | (169) | (207) | (338) | (411)
Amortization of prior service cost (credit) | 0 | 0 | 0 | 0
Amortization of net actuarial (gain) loss | 0 | 22 | 0 | (148)
Curtailments | 0 | (25) | 0 | (56)
Plan amendment | 0 | 0 | 0 | 22
Net periodic benefit (credit) cost | (41) | (80) | (83) | (332)
Other Postretirement Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | 2 | 3 | 5 | 6
Interest cost | 15 | 14 | 29 | 28
Expected return on plan assets | (40) | (43) | (80) | (85)
Amortization of prior service cost (credit) | (7) | (9) | (13) | (18)
Amortization of net actuarial (gain) loss | 0 | (37) | 0 | (69)
Curtailments | 0 | 0 | 0 | (4)
Plan amendment | 0 | 0 | 0 | 0
Net periodic benefit (credit) cost | $ (30) | $ (72) | $ (59) | $ (142)

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