Share-Based Compensation - Schedule of Share-Based Compensation Costs Related to RSUs and PRSUs (Details) - RSUs and PRSUs[Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total Share-based compensation expense	$ 28	$ 34
Cost of services [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total Share-based compensation expense	5	7
Selling, general and administrative expenses [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total Share-based compensation expense	$ 23	$ 27