Derivative Financial Instruments - Schedule of Derivative Instruments Designated As Hedging Instrument Effect on Condensed Consolidated Statements of Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
(Loss)/gain recognized in OCL (effective element)	$ 2	$ (2)	$ 2
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]
Derivative [Line Items]
(Loss)/gain recognized in OCL (effective element)	3	(8)	5
Gain/(loss) reclassified from Accumulated OCL into income (effective element)	$ (1)	$ (2)	$ 6
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Revenue [Member]
Derivative [Line Items]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	Revenues	Revenues	Revenues
Gain/(loss) reclassified from Accumulated OCL into income (effective element)	$ 1	$ 2	$ (3)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Salaries and Benefits [Member]
Derivative [Line Items]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	Labor and Related Expense	Labor and Related Expense	Labor and Related Expense
Gain/(loss) reclassified from Accumulated OCL into income (effective element)	$ (2)	$ (4)	$ 6
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Discontinued Operations [Member]
Derivative [Line Items]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX	INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX	INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX
Gain/(loss) reclassified from Accumulated OCL into income (effective element)	$ 0	$ 0	$ 3