Postretirement Benefit Plans - Expense Related to Defined Benefit and Retiree Health Care Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 21	$ 18	$ 18
Interest cost	30	31	38
Expected return on plan assets	(31)	(36)	(41)
Amortization of prior service cost (credit)	0	0	0
Recognized net actuarial loss	15	7	9
Net periodic benefit costs	35	20	24
Settlement losses	13	16	10
Total, including other postretirement losses	48	36	34
U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	3	3
Interest cost	10	13	14
Expected return on plan assets	(9)	(12)	(14)
Amortization of prior service cost (credit)	(2)	(2)	(1)
Recognized net actuarial loss	0	0	0
Net periodic benefit costs	2	2	2
Settlement losses	0	0	0
Total, including other postretirement losses	2	2	2
Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	36	34	31
Interest cost	37	38	43
Expected return on plan assets	(81)	(78)	(86)
Amortization of prior service cost (credit)	1	1	1
Recognized net actuarial loss	7	14	29
Net periodic benefit costs	0	9	18
Settlement losses	2	1	3
Total, including other postretirement losses	$ 2	$ 10	$ 21