Postretirement Benefit Plans - Plan Assets by Level Three Hierarchy (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 418	$ 421	$ 934
U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		264	280	385
Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,866	1,822	$ 2,813
Other | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	418	421
Other | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	260	273
Other | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	1,707	1,669
Level 1 | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Level 1 | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		4	7
Level 1 | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		106	92
Level 2 | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Level 2 | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Level 2 | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		53	61
Fixed income securities and cash equivalents | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		272	272
Fixed income securities and cash equivalents | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		210	182
Fixed income securities and cash equivalents | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,444	1,382
Fixed income securities and cash equivalents | Other | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	272	272
Fixed income securities and cash equivalents | Other | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	206	175
Fixed income securities and cash equivalents | Other | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	1,343	1,282
Fixed income securities and cash equivalents | Level 1 | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Fixed income securities and cash equivalents | Level 1 | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		4	7
Fixed income securities and cash equivalents | Level 1 | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		49	40
Fixed income securities and cash equivalents | Level 2 | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Fixed income securities and cash equivalents | Level 2 | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Fixed income securities and cash equivalents | Level 2 | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		52	60
Equity securities | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		146	149
Equity securities | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		54	98
Equity securities | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		422	440
Equity securities | Other | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	146	149
Equity securities | Other | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	54	98
Equity securities | Other | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	364	387
Equity securities | Level 1 | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Equity securities | Level 1 | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Equity securities | Level 1 | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		57	52
Equity securities | Level 2 | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Equity securities | Level 2 | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Equity securities | Level 2 | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 1	$ 1

[1] Consists of bond index and equity index funds, measured at net asset value per share, as well as cash equivalents.