Derivative Financial Instruments - Schedule of Derivative Instruments Designated As Hedging Instrument Effect on Condensed Consolidated Statements of Comprehensive Income (Details) - Cash Flow Hedging [Member] - Designated as Hedging Instrument [Member] - Foreign exchange contracts [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Derivative [Line Items]
(Loss)/gain recognized in OCI (effective element)	$ (1)	$ 4
(Loss)/gain reclassified from Accumulated OCL into income (effective element)	2	1
Revenue [Member]
Derivative [Line Items]
(Loss)/gain reclassified from Accumulated OCL into income (effective element)	0	(1)
Salaries and Benefits [Member]
Derivative [Line Items]
(Loss)/gain reclassified from Accumulated OCL into income (effective element)	2	1
Discontinued Operations [Member]
Derivative [Line Items]
(Loss)/gain reclassified from Accumulated OCL into income (effective element)	$ 0	$ 1