Commitments and Contingent Liabilities - Narrative (Details)	6 Months Ended
	Sep. 30, 2018 complaint defendant
Loss Contingencies [Line Items]
Complaints filed against the entity | complaint	1,000
Manufacturer Defendants | Her Majesty the Queen in Right of the Province of British Columbia v. Apotex, Inc., et al.
Loss Contingencies [Line Items]
Number of defendants	15
Distributor Defendants | Her Majesty the Queen in Right of the Province of British Columbia v. Apotex, Inc., et al.
Loss Contingencies [Line Items]
Number of defendants	11