v3.25.1
Accumulated Other Comprehensive Loss - Changes in AOCL, After Tax and Minority Interest (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance $ 4,906 $ 4,837
Ending balance 5,086 4,798
Foreign Currency Translation Adjustment    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance (1,705) (1,613)
Other comprehensive income (loss) before reclassifications 16 (6)
Amounts reclassified from accumulated other comprehensive loss 10 0
Ending balance (1,679) (1,619)
Unrealized Gains (Losses) from Securities    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance 1 1
Other comprehensive income (loss) before reclassifications 0 0
Amounts reclassified from accumulated other comprehensive loss 0 0
Ending balance 1 1
Unrecognized Net Actuarial Losses and Prior Service Costs    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance (2,140) (2,224)
Other comprehensive income (loss) before reclassifications 10 4
Amounts reclassified from accumulated other comprehensive loss 21 17
Ending balance (2,109) (2,203)
Deferred Derivative Gains (Losses)    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance 0 1
Other comprehensive income (loss) before reclassifications 0 0
Amounts reclassified from accumulated other comprehensive loss 0 1
Ending balance 0 2
Total    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance (3,844) (3,835)
Other comprehensive income (loss) before reclassifications 26 (2)
Amounts reclassified from accumulated other comprehensive loss 31 18
Ending balance $ (3,787) $ (3,819)