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Business Combinations - Acquisition of Vantage, Biologics and UDG Healthcare (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Business Acquisition [Line Items]
Cash purchase consideration	$ 905	$ 2,893	$ 4,212
Vantage, Biologics, Inc. (“Biologics”) and UDG Healthcare PLC (‘UDG”)
Business Acquisition [Line Items]
Cash purchase consideration			$ 1,600

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+ References

No definition available.

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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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