v3.25.2
Accumulated other comprehensive income (loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]            
Balance, beginning of period $ 9,605 $ 9,651 $ 5,608 $ 5,673 $ 9,651 $ 5,673
Other comprehensive income (loss) 170 47 (25) (71)    
Balance, end of period 9,659 9,605 5,492 5,608 9,659 5,492
Accumulated other comprehensive income (loss)            
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]            
Balance, beginning of period (231) (273) (97) (34) (273) (34)
Other comprehensive income (loss) 152 42 (22) (63)    
Balance, end of period (79) (231) (119) (97) (79) (119)
Foreign currency translation adjustments            
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]            
Balance, beginning of period (272) (330) (210) (149) (330) (149)
Other comprehensive income (loss) 184   (12)   248 (86)
Amounts allocated to Noncontrolling interests and Redeemable noncontrolling interests (20)   2   (26) 10
Reallocation due to change in Noncontrolling interest ownership percentage 0   1   0 6
Balance, end of period (108) (272) (219) (210) (108) (219)
Derivatives            
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]            
Balance, beginning of period 41 57 113 115 57 115
Unrealized gain (loss) on foreign currency hedges and interest rate hedges 3   10   3 39
Net amount reclassified from AOCI to net income (loss) (19)   (23)   (38) (49)
Tax effect 2   0   3 0
Amounts allocated to Noncontrolling interests and Redeemable noncontrolling interests 2   1   4 1
Reallocation due to change in Noncontrolling interest ownership percentage 0   (1)   0 (6)
Balance, end of period $ 29 $ 41 $ 100 $ 113 $ 29 $ 100