Annual report [Section 13 and 15(d), not S-K Item 405]

Employee Benefit Plans - Pretax Amounts Recognized in OCI (Details)

v3.25.4
Employee Benefit Plans - Pretax Amounts Recognized in OCI (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]    
Current year actuarial loss (gain) $ (318) $ (19)
Amortization of actuarial gain (loss) and prior service cost (163) (148)
Current year prior service cost (credit) 3 (9)
Amounts recognized in OCI (478) (176)
U.S. | Postretirement Health and Life Plans    
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]    
Current year actuarial loss (gain) 1 (38)
Amortization of actuarial gain (loss) and prior service cost 34 35
Current year prior service cost (credit) 0 0
Amounts recognized in OCI 35 (3)
Non-U.S. | Pension Plan    
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]    
Current year actuarial loss (gain) (4) 5
Amortization of actuarial gain (loss) and prior service cost (17) (16)
Current year prior service cost (credit) 3 (9)
Amounts recognized in OCI (18) (20)
Qualified | U.S. | Pension Plan    
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]    
Current year actuarial loss (gain) (359) (37)
Amortization of actuarial gain (loss) and prior service cost (144) (134)
Current year prior service cost (credit) 0 0
Amounts recognized in OCI (503) (171)
Nonqualified | U.S. | Other Pension Plan    
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]    
Current year actuarial loss (gain) 44 51
Amortization of actuarial gain (loss) and prior service cost (36) (33)
Current year prior service cost (credit) 0 0
Amounts recognized in OCI $ 8 $ 18