Goodwill and Intangible Assets, Net - Schedule of Changes in the Carrying Amount of Goodwill (Details) $ in Millions	6 Months Ended
	Sep. 30, 2022 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 9,451
Goodwill acquired	12
Foreign currency translation adjustments, net	(222)
Other adjustments	(2)
Ending balance	9,239
U.S. Pharmaceutical
Goodwill [Roll Forward]
Beginning balance	3,923
Goodwill acquired	11
Foreign currency translation adjustments, net	(72)
Other adjustments	(2)
Ending balance	3,860
Prescription Technology Solutions
Goodwill [Roll Forward]
Beginning balance	1,542
Goodwill acquired	0
Foreign currency translation adjustments, net	0
Other adjustments	0
Ending balance	1,542
Medical-Surgical Solutions
Goodwill [Roll Forward]
Beginning balance	2,453
Goodwill acquired	0
Foreign currency translation adjustments, net	0
Other adjustments	0
Ending balance	2,453
International
Goodwill [Roll Forward]
Beginning balance	1,533
Goodwill acquired	1
Foreign currency translation adjustments, net	(150)
Other adjustments	0
Ending balance	$ 1,384