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Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component, After Tax and Minority Interest (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance $ 4,837 $ 5,466 $ 5,184
Ending balance 4,906 4,837 5,466
Foreign Currency Translation Adjustment      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (1,613) (1,663) (1,402)
Other comprehensive income (loss) before reclassifications (92) 50 (261)
Amounts reclassified from accumulated other comprehensive loss 0 0 0
Ending balance (1,705) (1,613) (1,663)
Unrealized Gains (Losses) from Securities      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance 1 1 0
Other comprehensive income (loss) before reclassifications 0 0 1
Amounts reclassified from accumulated other comprehensive loss 0 0 0
Ending balance 1 1 1
Unrecognized Net Actuarial Losses and Prior Service Costs      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (2,224) (2,215) (2,565)
Other comprehensive income (loss) before reclassifications 5 (125) 162
Amounts reclassified from accumulated other comprehensive loss 79 116 188
Ending balance (2,140) (2,224) (2,215)
Deferred Derivative Gains (Losses)      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance 1 2 4
Other comprehensive income (loss) before reclassifications 0 (5) 0
Amounts reclassified from accumulated other comprehensive loss (1) 4 (2)
Ending balance 0 1 2
Total      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (3,835) (3,875) (3,963)
Other comprehensive income (loss) before reclassifications (87) (80) (98)
Amounts reclassified from accumulated other comprehensive loss 78 120 186
Ending balance $ (3,844) $ (3,835) $ (3,875)