Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total Other comprehensive income (loss), net of tax		$ 135	$ (113)
Total Other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax		167	(40)
Other comprehensive income (loss), pretax		167	(40)
Total Other comprehensive income (loss), net of tax	[1]	137	(110)
Cumulative translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax		96	(99)
Other comprehensive income (loss), pretax		96	(99)
Total Other comprehensive income (loss), net of tax		82	(155)
Retirement plans and other retiree benefits adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax		18	3
Other comprehensive income (loss), before reclassifications, pretax		0	(19)
Reclassification from AOCI, pretax		18	22
Other comprehensive income (loss), pretax		18	3
Other comprehensive income (loss), before reclassifications, net of tax		0	(14)
Reclassification from AOCI, net of tax		14	16
Total Other comprehensive income (loss), net of tax		14	2
Gains (losses) on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax		53	56
Other comprehensive income (loss), before reclassifications, pretax		58	53
Reclassification from AOCI, pretax		(5)	3
Other comprehensive income (loss), pretax		53	56
Other comprehensive income (loss), before reclassifications, net of tax		45	41
Reclassification from AOCI, net of tax		(4)	2
Total Other comprehensive income (loss), net of tax		$ 41	$ 43

[1] Accumulated other comprehensive income (loss) includes cumulative translation losses of $3,269 at March 31, 2022 ($3,313 at March 31, 2021) and $3,349 at December 31, 2021 ($3,158 at December 31, 2020), respectively, and unrecognized retirement plan and other retiree benefits costs of $1,030 at March 31, 2022 ($1,176 at March 31, 2021) and $1,044 at December 31, 2021 ($1,178 at December 31, 2020), respectively.