v3.25.2
Other Comprehensive (Loss) Income (Accumulated Other Comprehensive (Loss) Income) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period     $ 13,535  
Other comprehensive income (loss), net of tax $ 652 $ (18) 996 $ (232)
Balance, end of period 15,976 13,565 15,976 13,565
Deferred tax assets, net 1,600 1,500 1,600 1,500
Total        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period (5,896) (5,509) (6,240) (5,295)
Other comprehensive income (loss) before reclassifications 643 (23) 980 (241)
Amounts reclassified from accumulated other comprehensive income 9 5 16 9
Other comprehensive income (loss), net of tax 652 (18) 996 (232)
Balance, end of period (5,244) (5,527) (5,244) (5,527)
Pension/Post-Retirement Plans Gains (Losses)        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period (3,475) (3,064) (3,408) (3,101)
Other comprehensive income (loss) before reclassifications (166) 9 (240) 42
Amounts reclassified from accumulated other comprehensive income 9 5 16 9
Other comprehensive income (loss), net of tax (157) 14 (224) 51
Balance, end of period (3,632) (3,050) (3,632) (3,050)
Foreign Currency Translation Adjustments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period (2,421) (2,445) (2,832) (2,194)
Other comprehensive income (loss) before reclassifications 809 (32) 1,220 (283)
Amounts reclassified from accumulated other comprehensive income 0 0 0 0
Other comprehensive income (loss), net of tax 809 (32) 1,220 (283)
Balance, end of period $ (1,612) $ (2,477) $ (1,612) $ (2,477)