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Changes in Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Accumulated comprehensive loss at beginning of the year $ 10,037  
Other comprehensive income (loss) before reclassifications 237 $ 112
Amounts reclassified from accumulated other comprehensive loss (18) (5)
Net current-period other comprehensive income (loss) 219 107
Ending balance 9,810  
Changes related to cash flow derivative hedges    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Accumulated comprehensive loss at beginning of the year (595) (823)
Other comprehensive income (loss) before reclassifications 239 133
Amounts reclassified from accumulated other comprehensive loss (18) (5)
Net current-period other comprehensive income (loss) 221 128
Ending balance (374) (695)
Changes in defined benefit plans    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Accumulated comprehensive loss at beginning of the year 6 10
Other comprehensive income (loss) before reclassifications (2) (4)
Amounts reclassified from accumulated other comprehensive loss 0 0
Net current-period other comprehensive income (loss) (2) (4)
Ending balance 4 6
Foreign currency translation adjustments    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Accumulated comprehensive loss at beginning of the year (15) 11
Other comprehensive income (loss) before reclassifications 0 (17)
Amounts reclassified from accumulated other comprehensive loss 0 0
Net current-period other comprehensive income (loss) 0 (17)
Ending balance (15) (6)
Accumulated other comprehensive loss    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Accumulated comprehensive loss at beginning of the year (604) (802)
Ending balance $ (385) $ (695)