Employee Benefit Obligations - Weighted Average Assumptions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Weighted-average assumptions used to determine net periodic benefit cost
Pension expense		$ 14
Forecast
Weighted-average assumptions used to determine net periodic benefit cost
Pension expense	$ 19
Defined Benefit Pension Plans
Weighted-average assumptions used to determine net periodic benefit cost
Effect of one quarter of a percentage point reduction in the expected return on pension assets assumption, on pension expense		7
Effect of quarter of a percentage point reduction in the discount rate applied to the pension liability, on pension expense		8
Pension expense		14	$ (7)	$ 18
Market related value of plan assets used to calculate expected return		2,946	3,297	3,271
Non-U.S. | Defined Benefit Pension Plans
Weighted-average assumptions used to determine net periodic benefit cost
Pension expense		$ 22	$ (7)	$ 2
UNITED KINGDOM | Defined Benefit Pension Plans
Weighted-average assumptions used to determine benefit obligations
Discount rate (as a percent)		4.95%	3.95%	5.01%
Rate of compensation increase (as a percent)			3.50%	3.50%
Pension increase (as a percent)		3.43%	3.34%	3.43%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate (as a percent)		3.95%	5.01%	1.81%
Rate of compensation increase (as a percent)		3.50%	3.50%	3.50%
Pension increase (as a percent)		3.34%	3.43%	3.64%
Expected long-term rate of return on assets (as a percent)		3.95%	5.11%	1.91%
GERMANY | Defined Benefit Pension Plans
Weighted-average assumptions used to determine benefit obligations
Discount rate (as a percent)		3.32%	3.14%	3.69%
Rate of compensation increase (as a percent)		2.75%	2.69%	2.68%
Pension increase (as a percent)		2.20%	2.18%	1.80%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate (as a percent)		3.16%	3.70%	1.12%
Rate of compensation increase (as a percent)		2.70%	2.69%	2.50%
Pension increase (as a percent)		2.20%	1.80%	1.70%
U.S. | Defined Benefit Pension Plans
Weighted-average assumptions used to determine benefit obligations
Discount rate (as a percent)		5.59%	5.14%	5.48%
Rate of compensation increase (as a percent)		4.37%	4.37%	4.37%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate (as a percent)		5.14%	5.48%	2.83%
Rate of compensation increase (as a percent)		4.37%	4.37%	4.37%
Expected long-term rate of return on assets (as a percent)		7.31%	7.04%	5.90%
Pension expense		$ (8)		$ 16