Contractual Commitments, Contingencies and Off-Balance Sheet Arrangements - Additional Information (Details) $ in Millions	1 Months Ended			3 Months Ended	9 Months Ended
	Dec. 31, 2019	Mar. 31, 2015 term	Mar. 31, 2014 term	Mar. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Payment to acquire equity method investment					$ 1.7
Future capital commitment				$ 3.5	3.5
IT Services Agreement
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
IT service agreement extension term		2 years
Number of renewal terms option one | term		1
Renewal term option one (in months)		12 months
Remaining commitment amount				251.7
IBM Private Cloud Agreement
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Remaining commitment amount				242.8
Agreement term	10 years 3 months
Non-cash pre-tax charge on write-down					32.1
Assets held-for-sale				18.0	$ 18.0
EU IT Services Agreement
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Number of renewal terms option one | term			1
Renewal term option one (in months)			12 months
Remaining commitment amount				$ 25.5
Number of renewal terms option two | term			1
Renewal term option two (in months)			24 months