Postretirement Benefit Plans - Plan Assets by Level Three Hierarchy (Details) - USD ($) $ in Millions		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 381	$ 400	$ 418
U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		243	248	264
Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,779	1,708	$ 1,866
Other measurement basis | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	247	257
Other measurement basis | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	243	246
Other measurement basis | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	1,262	1,190
Level 1 | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		72	92
Level 1 | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	2
Level 1 | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		42	42
Level 2 | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		62	51
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		475	476
Fixed income securities and cash equivalents | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		230	244
Fixed income securities and cash equivalents | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		243	198
Fixed income securities and cash equivalents | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,371	1,310
Fixed income securities and cash equivalents | Other measurement basis | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	96	101
Fixed income securities and cash equivalents | Other measurement basis | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	243	196
Fixed income securities and cash equivalents | Other measurement basis | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	885	820
Fixed income securities and cash equivalents | Level 1 | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		72	92
Fixed income securities and cash equivalents | Level 1 | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	2
Fixed income securities and cash equivalents | Level 1 | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		12	15
Fixed income securities and cash equivalents | Level 2 | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		62	51
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		474	475
Equity securities | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		151	156
Equity securities | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			50
Equity securities | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		408	398
Equity securities | Other measurement basis | U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	151	156
Equity securities | Other measurement basis | U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]		50
Equity securities | Other measurement basis | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	377	370
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
Equity securities | Level 1 | Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		30	27
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
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.