Goodwill and Intangible Assets, Net - Schedule of Information Regarding Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2024	Mar. 31, 2024
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,311	$ 4,033
Accumulated Amortization	(1,738)	(1,923)
Net Carrying Amount	1,573	2,110
Held-for-sale | Canadian retail disposal group
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 419
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Amortization Period (Years)	11 years
Gross Carrying Amount	$ 1,480	1,830
Accumulated Amortization	(604)	(701)
Net Carrying Amount	$ 876	1,129
Service agreements
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Amortization Period (Years)	9 years
Gross Carrying Amount	$ 1,129	1,126
Accumulated Amortization	(707)	(676)
Net Carrying Amount	$ 422	450
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Amortization Period (Years)	13 years
Gross Carrying Amount	$ 384	759
Accumulated Amortization	(268)	(395)
Net Carrying Amount	$ 116	364
Technology
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Amortization Period (Years)	10 years
Gross Carrying Amount	$ 284	284
Accumulated Amortization	(133)	(125)
Net Carrying Amount	$ 151	159
Other
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Amortization Period (Years)	6 years
Gross Carrying Amount	$ 34	34
Accumulated Amortization	(26)	(26)
Net Carrying Amount	$ 8	$ 8