Goodwill and Intangible Assets, Net - Schedule of Information Regarding Intangible Assets (Details) - USD ($) $ in Millions	6 Months Ended
	Sep. 30, 2022	Mar. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,860	$ 4,996
Accumulated Amortization	(2,988)	(2,937)
Net Carrying Amount	$ 1,872	2,059
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Amortization Period (Years)	12 years
Gross Carrying Amount	$ 2,710	2,777
Accumulated Amortization	(1,703)	(1,691)
Net Carrying Amount	$ 1,007	1,086
Service agreements
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Amortization Period (Years)	9 years
Gross Carrying Amount	$ 1,063	1,085
Accumulated Amortization	(591)	(573)
Net Carrying Amount	$ 472	512
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Amortization Period (Years)	11 years
Gross Carrying Amount	$ 765	819
Accumulated Amortization	(402)	(386)
Net Carrying Amount	$ 363	433
Technology
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Amortization Period (Years)	3 years
Gross Carrying Amount	$ 132	128
Accumulated Amortization	(120)	(116)
Net Carrying Amount	$ 12	12
Other
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Amortization Period (Years)	9 years
Gross Carrying Amount	$ 190	187
Accumulated Amortization	(172)	(171)
Net Carrying Amount	$ 18	$ 16