Retirement Programs - Pension Plan Asset Fair Value By Category And Level 3 Rollforward (Details) - Pensions - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	$ 8,228
Fair value of plan assets, December 31	8,126	$ 8,228
Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	1,720	1,759
Gain/(Loss) for the period	1	(65)
Purchases	32	5
Sales	(292)	(59)
Transfer into / (out of) Level 3	0	0
Foreign currency translation	(45)	80
Fair value of plan assets, December 31	1,416	1,720
Pool Funds Measured at NAV
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	1,572
Fair value of plan assets, December 31	1,483	1,572
Cash and cash equivalents | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	368
Fair value of plan assets, December 31	407	368
Cash and cash equivalents | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	368
Fair value of plan assets, December 31	407	368
Cash and cash equivalents | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Cash and cash equivalents | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Global equities | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	926
Fair value of plan assets, December 31	1,149	926
Global equities | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	926
Fair value of plan assets, December 31	1,149	926
Global equities | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Global equities | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Mutual funds | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	298
Fair value of plan assets, December 31	344	298
Mutual funds | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	298
Fair value of plan assets, December 31	344	298
Mutual funds | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Mutual funds | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Government bonds | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	1,486
Fair value of plan assets, December 31	1,304	1,486
Government bonds | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Government bonds | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	1,486
Fair value of plan assets, December 31	1,304	1,486
Government bonds | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Emerging market debt | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	283
Fair value of plan assets, December 31	294	283
Emerging market debt | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Emerging market debt | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	283
Fair value of plan assets, December 31	294	283
Emerging market debt | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Mutual funds | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	179
Fair value of plan assets, December 31	191	179
Mutual funds | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	119
Fair value of plan assets, December 31	130	119
Mutual funds | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	60
Fair value of plan assets, December 31	61	60
Mutual funds | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Corporate bonds | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	324
Fair value of plan assets, December 31	401	324
Corporate bonds | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Corporate bonds | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	324
Fair value of plan assets, December 31	401	324
Corporate bonds | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Bank loans | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	27
Fair value of plan assets, December 31	25	27
Bank loans | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Bank loans | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	27
Fair value of plan assets, December 31	25	27
Bank loans | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Real estate funds | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	324
Fair value of plan assets, December 31	314	324
Real estate funds | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Real estate funds | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Real estate funds | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	324	353
Gain/(Loss) for the period	10	(27)
Purchases	28	3
Sales	(37)	(15)
Transfer into / (out of) Level 3	0	0
Foreign currency translation	(11)	10
Fair value of plan assets, December 31	314	324
Private debt | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	1,345
Fair value of plan assets, December 31	1,048	1,345
Private debt | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Private debt | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Private debt | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	1,345	1,360
Gain/(Loss) for the period	(12)	(38)
Purchases	0	1
Sales	(255)	(44)
Transfer into / (out of) Level 3	0	0
Foreign currency translation	(30)	66
Fair value of plan assets, December 31	1,048	1,345
Insurance contracts | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	51
Fair value of plan assets, December 31	54	51
Insurance contracts | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Insurance contracts | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Insurance contracts | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	51	46
Gain/(Loss) for the period	3	0
Purchases	4	1
Sales	0	0
Transfer into / (out of) Level 3	0	0
Foreign currency translation	(4)	4
Fair value of plan assets, December 31	54	51
Liquid alternatives | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	1,022
Fair value of plan assets, December 31	1,087	1,022
Liquid alternatives | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Liquid alternatives | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	1,022
Fair value of plan assets, December 31	1,087	1,022
Liquid alternatives | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Other investments | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	23
Fair value of plan assets, December 31	25	23
Other investments | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	1
Fair value of plan assets, December 31	2	1
Other investments | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	22
Fair value of plan assets, December 31	23	22
Other investments | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	0
Fair value of plan assets, December 31	0	0
Total pension assets, by level | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	6,656
Fair value of plan assets, December 31	6,643	6,656
Total pension assets, by level | Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	1,712
Fair value of plan assets, December 31	2,032	1,712
Total pension assets, by level | Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	3,224
Fair value of plan assets, December 31	3,195	3,224
Total pension assets, by level | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, January 1	1,720
Fair value of plan assets, December 31	$ 1,416	$ 1,720