Pensions and Other Postretirement Benefit Plans - Actuarial Assumptions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Components of net benefit cost/(income)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible List]	Other income/(expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible List]	Other income/(expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible List]	Other income/(expense)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible List]	Other income/(expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement and Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible List]	Other income/(expense)
United States
Weighted average assumptions used to determine projected benefit obligations
Discount rate for determining benefit obligation	5.48%	4.82%
Interest crediting rate for cash balance plans	5.39%	4.76%
Weighted average assumptions used to determine net benefit cost/(income)
Discount rate - interest cost	4.82%	5.01%	2.70%
Interest crediting rate for cash balance plans	4.76%	4.96%	2.58%
Expected long-term rate of return on assets	6.00%	6.25%	4.75%
Components of net benefit cost/(income)
Service cost	$ 0	$ 0	$ 0
Interest cost on benefit obligation	46	47	27
Expected return on plan assets	(56)	(59)	(45)
Amortization of actuarial net loss	0	0	4
Amortization of prior service cost/(benefit)	0	0	0
Settlement/curtailment loss/(gain)	0	0	0
Net periodic benefit cost/(income)	$ (10)	$ (12)	$ (14)
Foreign Plan
Weighted average assumptions used to determine projected benefit obligations
Discount rate for determining benefit obligation	3.74%	3.47%
Interest crediting rate for cash balance plans	2.28%	2.06%
Average rate of increase in employee compensation	2.58%	2.64%
Weighted average assumptions used to determine net benefit cost/(income)
Discount rate - service cost	3.00%	3.62%	1.00%
Discount rate - interest cost	3.48%	3.95%	1.36%
Interest crediting rate for cash balance plans	2.06%	2.19%	1.25%
Average rate of increase in employee compensation	2.64%	2.77%	2.73%
Expected long-term rate of return on assets	4.28%	4.33%	2.33%
Components of net benefit cost/(income)
Service cost	$ 28	$ 26	$ 34
Interest cost on benefit obligation	40	42	20
Expected return on plan assets	(36)	(37)	(26)
Amortization of actuarial net loss	4	2	7
Amortization of prior service cost/(benefit)	(1)	(1)	(1)
Settlement/curtailment loss/(gain)	2	1	(2)
Net periodic benefit cost/(income)	$ 38	$ 33	$ 32