Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021		Sep. 30, 2022		Sep. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity attributable to parent, beginning balance					$ 13,260
Stockholders' equity attributable to parent, ending balance		$ 9,838			9,838
Foreign currency translation [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity attributable to parent, beginning balance	[1]	(794)	$ (376)		(489)		$ (400)
Other comprehensive (loss)/income before reclassifications	[1]	(240)	(81)		(545)		(101)
Amounts reclassified from accumulated other comprehensive income/(loss) (net of income tax)	[1]	0	0		0	[2]	44	[2]
Net current-period other comprehensive (loss)/income	[1]	(240)	(81)		(545)		(57)
Stockholders' equity attributable to parent, ending balance		(1,034)	(457)	[1]	(1,034)		(457)	[1]
Derivative instruments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity attributable to parent, beginning balance	[1]	6	13		11		9
Other comprehensive (loss)/income before reclassifications	[1]	(5)	(1)		(8)		7
Amounts reclassified from accumulated other comprehensive income/(loss) (net of income tax)	[1]	1	(1)		(1)	[2]	(5)	[2]
Net current-period other comprehensive (loss)/income	[1]	(4)	(2)		(9)		2
Stockholders' equity attributable to parent, ending balance	[1]	2	11		2		11
Defined pension and post-retirement benefit costs [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity attributable to parent, beginning balance	[3]	(1,698)	(1,915)		(1,708)		(1,968)
Other comprehensive (loss)/income before reclassifications	[3]	5	2		3		2
Amounts reclassified from accumulated other comprehensive income/(loss) (net of income tax)	[3]	5	0		17	[2]	53	[2]
Net current-period other comprehensive (loss)/income	[3]	10	2		20		55
Stockholders' equity attributable to parent, ending balance	[3]	(1,688)	(1,913)		(1,688)		(1,913)
Total [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity attributable to parent, beginning balance		(2,486)	(2,278)		(2,186)		(2,359)
Other comprehensive (loss)/income before reclassifications		(240)	(80)		(550)		(92)
Amounts reclassified from accumulated other comprehensive income/(loss) (net of income tax)		6	(1)		16	[2]	92	[2]
Net current-period other comprehensive (loss)/income		(234)	(81)		(534)		(0)
Stockholders' equity attributable to parent, ending balance		$ (2,720)	$ (2,359)		$ (2,720)		$ (2,359)

[1] Reclassification adjustments from accumulated other comprehensive loss related to derivative instruments are included in Revenue and Salaries and benefits in the accompanying condensed consolidated statements of comprehensive income. See Note 9 — Derivative Financial Instruments for additional details regarding the reclassification adjustments for the derivative settlements.

[2] Includes reclassifications in 2021 of $44 million and $31 million of foreign currency translation and defined pension and post-retirement benefit costs, respectively, attributable to the gain on disposal of our Miller business (see Note 3 — Acquisitions and Divestitures). The net gain on disposal is included in Other income, net in the accompanying condensed consolidated statements of comprehensive income.

[3] Reclassification adjustments from accumulated other comprehensive loss are included in the computation of net periodic pension cost (see Note 12 — Retirement Benefits). These components are included in Other income, net in the accompanying condensed consolidated statements of comprehensive income.