Accounting for Share-Based Payments - Assumptions (Details)		3 Months Ended				12 Months Ended
	Apr. 01, 2016	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2016
Weighted-average assumptions to determine fair value of stock option awards
Actual forfeiture rate (as a percent)		3.00%	3.00%	3.00%	10.00%	3.00%
Estimated future unvested option forfeitures (as a percent)	10.00%