Goodwill and Intangible Assets, Net - Schedule of Changes in the Carrying Amount of Goodwill and Narrative (Details) $ in Millions	3 Months Ended
	Jun. 30, 2020 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 9,360
Goodwill acquired	1
Foreign currency translation adjustments, net	58
Ending balance	9,419
U.S. Pharmaceutical and Specialty Solutions
Goodwill [Roll Forward]
Beginning balance	4,067
Goodwill acquired	0
Foreign currency translation adjustments, net	12
Ending balance	4,079
European Pharmaceutical Solutions
Goodwill [Roll Forward]
Beginning balance	63
Goodwill acquired	1
Foreign currency translation adjustments, net	1
Ending balance	65
Medical-Surgical Solutions
Goodwill [Roll Forward]
Beginning balance	2,453
Goodwill acquired	0
Foreign currency translation adjustments, net	0
Ending balance	2,453
Other
Goodwill [Roll Forward]
Beginning balance	2,777
Goodwill acquired	0
Foreign currency translation adjustments, net	45
Ending balance	$ 2,822