Retirement Benefits (Components of the Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension  Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 23	$ 23	$ 28
Interest cost	579	599	389
Expected return on plan assets	(876)	(860)	(778)
Amortization of prior service	1	0	1
Recognized actuarial loss (gain)	31	22	149
Net periodic benefit (credit) cost	(242)	(216)	(211)
Settlement loss	2	2	2
Net benefit (credit) cost	(240)	(214)	(209)
Pension  Benefits | United States
Defined Benefit Plan Disclosure [Line Items]
Interest cost	250	260	193
Expected return on plan assets	(303)	(311)	(336)
Recognized actuarial loss (gain)	21	19	74
Net periodic benefit (credit) cost	(32)	(32)	(69)
Net benefit (credit) cost	(21)	(19)
Pension  Benefits | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	23	23	28
Interest cost	329	339	196
Expected return on plan assets	(573)	(549)	(442)
Amortization of prior service	1	0	1
Recognized actuarial loss (gain)	10	3	75
Net periodic benefit (credit) cost	(210)	(184)	(142)
Settlement loss	2	2	2
Net benefit (credit) cost	(208)	(182)	(140)
Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0
Interest cost	3	3	3
Expected return on plan assets	0	0	0
Amortization of prior service	(2)	(2)	(2)
Recognized actuarial loss (gain)	(6)	(3)	1
Net periodic benefit (credit) cost	(5)	(2)	2
Settlement loss	0	0	0
Net benefit (credit) cost	(5)	(2)	2
Post-retirement Benefits | United States
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1	1	1
Expected return on plan assets	0	0	0
Recognized actuarial loss (gain)	(1)	(2)	0
Net periodic benefit (credit) cost	0	(1)	1
Net benefit (credit) cost	0	2
Post-retirement Benefits | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0
Interest cost	2	2	2
Expected return on plan assets	0	0	0
Amortization of prior service	(2)	(2)	(2)
Recognized actuarial loss (gain)	(5)	(1)	1
Net periodic benefit (credit) cost	(5)	(1)	1
Settlement loss	0	0	0
Net benefit (credit) cost	$ (5)	$ (1)	$ 1