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Changes in Accumulated Other Comprehensive Loss by Component - Summary of Changes in AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2025
Sep. 30, 2024
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]                
Balance at beginning of period $ 12,052 $ 11,665 $ 11,407 $ 11,006 $ 10,821 $ 10,543 $ 11,407 $ 10,543
Net current period other comprehensive loss (3) 3 (5) (10) (4) 7 (5) (7)
Balance at end of period 11,872 12,052 11,665 11,230 11,006 10,821 11,872 11,230
Total                
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]                
Balance at beginning of period (28) (31) (26) (9) (5) (12) (26) (12)
Other comprehensive income (loss) before reclassifications             (4)  
Amounts reclassified from accumulated other comprehensive loss             (1)  
Net current period other comprehensive loss (3) 3 (5) (10) (4) 7 (5)  
Balance at end of period (31) $ (28) (31) $ (19) $ (9) $ (5) (31) $ (19)
Cash Flow Hedges                
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]                
Balance at beginning of period     (13)       (13)  
Other comprehensive income (loss) before reclassifications             0  
Amounts reclassified from accumulated other comprehensive loss             1  
Net current period other comprehensive loss             1  
Balance at end of period (12)           (12)  
Defined Benefit Pension Items                
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]                
Balance at beginning of period     0       0  
Other comprehensive income (loss) before reclassifications             2  
Amounts reclassified from accumulated other comprehensive loss             (2)  
Net current period other comprehensive loss             0  
Balance at end of period 0           0  
Foreign Currency Translation                
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]                
Balance at beginning of period     $ (13)       (13)  
Other comprehensive income (loss) before reclassifications             (6)  
Amounts reclassified from accumulated other comprehensive loss             0  
Net current period other comprehensive loss             (6)  
Balance at end of period $ (19)           $ (19)