Pension, Other Postretirement Benefits and Savings Plans - Benefit Costs and Amounts Recognized in Other Comprehensive (Income) Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Postretirement Benefits Plan [Member]
Benefits cost (credit):
Service cost	$ 3	$ 2	$ 2
Interest cost	9	8	11
Expected return on plan assets	0	0	0
Amortization of prior service cost (credit)	(6)	(9)	(9)
Amortization of net losses	3	4	3
Net periodic cost	9	5	7
Net curtailments/settlements /termination benefits	0	(4)	0
Benefits cost	9	1	7
Recognized in other comprehensive (income) loss before tax and minority:
Prior service cost (credit) from plan amendments	(4)	0	0
(Decrease) increase in net actuarial losses	(20)	5	6
Amortization of prior service (cost) credit in net periodic cost	6	9	9
Amortization of net losses in net periodic cost	(3)	(4)	(3)
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures	0	6	2
Total recognized in other comprehensive (income) loss before tax and minority	(21)	16	14
Total recognized in total benefits cost and other comprehensive (income) loss before tax and minority	(12)	17	21
UNITED STATES | Pension Plan [Member]
Benefits cost (credit):
Service cost	9	4	3
Interest cost	94	126	173
Expected return on plan assets	(196)	(193)	(223)
Amortization of prior service cost (credit)	0	0	0
Amortization of net losses	107	109	112
Net periodic cost	14	46	65
Net curtailments/settlements /termination benefits	41	31	8
Benefits cost	55	77	73
Recognized in other comprehensive (income) loss before tax and minority:
Prior service cost (credit) from plan amendments	0	0	0
(Decrease) increase in net actuarial losses	(45)	108	4
Amortization of prior service (cost) credit in net periodic cost	0	0	0
Amortization of net losses in net periodic cost	(107)	(109)	(112)
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures	(41)	(26)	(5)
Total recognized in other comprehensive (income) loss before tax and minority	(193)	(27)	(113)
Total recognized in total benefits cost and other comprehensive (income) loss before tax and minority	(138)	50	(40)
UNITED STATES | Other Postretirement Benefits Plan [Member]
Benefits cost (credit):
Benefits cost	5	1	3
Foreign Plan [Member] | Pension Plan [Member]
Benefits cost (credit):
Service cost	30	30	26
Interest cost	47	56	69
Expected return on plan assets	(48)	(54)	(59)
Amortization of prior service cost (credit)	1	1	2
Amortization of net losses	33	38	29
Net periodic cost	63	71	67
Net curtailments/settlements /termination benefits	2	(4)	3
Benefits cost	65	67	70
Recognized in other comprehensive (income) loss before tax and minority:
Prior service cost (credit) from plan amendments	3	3	(2)
(Decrease) increase in net actuarial losses	(136)	(100)	201
Amortization of prior service (cost) credit in net periodic cost	(2)	(2)	(2)
Amortization of net losses in net periodic cost	(33)	(38)	(29)
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures	(2)	(9)	(3)
Total recognized in other comprehensive (income) loss before tax and minority	(170)	(146)	165
Total recognized in total benefits cost and other comprehensive (income) loss before tax and minority	(105)	(79)	235
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member]
Benefits cost (credit):
Benefits cost	$ 4	$ 0	$ 4