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Accumulated Other Comprehensive Income - Changes in Accumulated Balances of Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss), Tax    
Beginning balance $ 8 $ 37
Other comprehensive income (loss) before reclassifications 10 (5)
Less: Amount of gain (loss) reclassified from AOCI (2) 2
Net current period other comprehensive income (loss) 12 (7)
Ending balance 20 30
Accumulated Other Comprehensive Income (Loss), Net of Tax    
Beginning balance 5,158  
Other comprehensive income (loss) before reclassifications (6) (20)
Less: Amount of gain (loss) reclassified from AOCI 8 (6)
Other comprehensive loss, net of tax (14) (14)
Ending balance 4,950 6,273
Unrealized Gains (Losses) on Derivative Instruments    
Accumulated Other Comprehensive Income (Loss), Before Tax    
Beginning balance 75 (13)
Other comprehensive income (loss) before reclassifications (49) 14
Less: Amount of gain (loss) reclassified from AOCI 10 (8)
Net current period other comprehensive income (loss) (59) 22
Ending balance 16 9
Unrealized Gains (Losses) on Investments    
Accumulated Other Comprehensive Income (Loss), Before Tax    
Beginning balance (7) (45)
Other comprehensive income (loss) before reclassifications 8 8
Less: Amount of gain (loss) reclassified from AOCI 0 0
Net current period other comprehensive income (loss) 8 8
Ending balance 1 (37)
Foreign Currency Translation    
Accumulated Other Comprehensive Income (Loss), Before Tax    
Beginning balance 130 206
Other comprehensive income (loss) before reclassifications 25 (37)
Less: Amount of gain (loss) reclassified from AOCI 0 0
Net current period other comprehensive income (loss) 25 (37)
Ending balance 155 169
Accumulated other comprehensive income:    
Accumulated Other Comprehensive Income (Loss), Net of Tax    
Beginning balance 206 185
Ending balance $ 192 $ 171