v3.26.1
Accumulated other comprehensive loss - Schedule of Change in AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance $ 5,857  
Other comprehensive (loss) income before reclassifications (11) $ 2
Amounts reclassified from accumulated other comprehensive loss 4 3
Total other comprehensive (loss) income, net of tax (7) 5
Ending balance 5,874 5,423
Total    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (1,032) (955)
Total other comprehensive (loss) income, net of tax (7) 5
Ending balance (1,039) (950)
Foreign currency translation    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (456) (491)
Other comprehensive (loss) income before reclassifications (11) 0
Amounts reclassified from accumulated other comprehensive loss 0 0
Total other comprehensive (loss) income, net of tax (11) 0
Ending balance (467) (491)
Pensions    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (576) (464)
Other comprehensive (loss) income before reclassifications 0 2
Amounts reclassified from accumulated other comprehensive loss 4 3
Total other comprehensive (loss) income, net of tax 4 5
Ending balance $ (572) $ (459)