Debt - Long term debt (Details) - USD ($) $ in Millions	1 Months Ended		6 Months Ended	12 Months Ended
	Jul. 31, 2025	May 31, 2025	Jun. 30, 2025	Dec. 31, 2024
Long-term debt
Finance lease obligations			$ 8	$ 7
Balance sheet location for finance lease liabilities			Short-term debt and current portion of long-term debt, Long-term debt	Short-term debt and current portion of long-term debt, Long-term debt
Other (including debt issuance costs)			$ (52)	$ (43)
Long-term debt, Total			6,926	5,503
Less: Current portion of long-term debt			(447)	(191)
Long-term debt			6,479	5,312
Short-term debt
Current portion of long-term debt			447	191
Short-term finance leases				24
Short-term debt and current portion of long-term debt			548	361
Senior Notes 5.25% due July 2025
Long-term debt
Long-term debt			$ 189	$ 189
Short-term debt
Interest rate (as a percent)			5.25%	5.25%
Senior Notes 5.25% due July 2025 | Subsequent event
Short-term debt
Interest rate (as a percent)	5.25%
Repayments of senior debt	$ 189
Senior Notes 4.875% due March 2026
Long-term debt
Long-term debt			$ 256	$ 256
Short-term debt
Interest rate (as a percent)			4.875%	4.875%
Senior Notes 1.50%, euro denominated, due March 2027
Long-term debt
Long-term debt			$ 648	$ 569
Short-term debt
Interest rate (as a percent)			1.50%	1.50%
6.875% due March 2028
Long-term debt
Long-term debt			$ 750	$ 750
Short-term debt
Interest rate (as a percent)			6.875%	6.875%
Senior Notes 6.00% due June 2029
Long-term debt
Long-term debt			$ 1,000	$ 1,000
Short-term debt
Interest rate (as a percent)			6.00%	6.00%
Senior Notes 2.875% due August 2030
Long-term debt
Long-term debt			$ 1,300	$ 1,300
Short-term debt
Interest rate (as a percent)			2.875%	2.875%
Senior Notes 3.125% due September 2031
Long-term debt
Long-term debt			$ 850	$ 850
Short-term debt
Interest rate (as a percent)			3.125%	3.125%
Senior Notes 4.25%, euro denominated, due July 2032
Long-term debt
Long-term debt			$ 1,002
Short-term debt
Interest rate (as a percent)		4.25%	4.25%
U.S. dollar revolver due June 2027
Long-term debt
Long-term debt			$ 250
Short-term debt
Variable interest rate (as a percent)			5.66%
Repayments of senior debt		$ 500
Committed multi-currency revolving credit facilities due 2027
Long-term debt
Long-term debt			$ 100
Short-term debt
Variable interest rate (as a percent)			5.68%
Repayments of senior debt		$ 200
Term A Loan Due June 2027
Long-term debt
Long-term debt			$ 625	$ 625
Short-term debt
Variable interest rate (as a percent)			5.68%	5.68%
Short term committed revolving credit facilities
Short-term debt
Short-term loans				$ 109
Short-term uncommitted credit facilities
Short-term debt
Short-term loans			$ 101	$ 37