Income Taxes (Tables)

9 Months Ended

Mar. 31, 2017

Income Taxes [Abstract]

Schedule of Reconciliation of Income Tax Provision

	Three months ended March 31,				Nine months ended March 31,
	2017		2016		2017		2016
	(in millions)
Expected expense/(benefit) at the statutory rate	$	9.6	$	(3.9)	$	24.4	$	(8.2)
Increase/(decrease) due to:
Non-deductible stock-based compensation		—		5.2		4.0		22.6
Excess tax benefit on stock-based compensation		(13.1)		—		(16.7)		—
State income taxes benefit, net of federal benefit		0.6		(0.2)		2.1		(0.7)
Transactions costs not deductible for tax purposes		1.5		0.6		1.8		1.1
Change in tax rates		—		—		(1.7)		—
Foreign tax rate differential		(1.8)		0.5		(2.1)		0.8
Foreign entities with valuation allowance		(2.0)		—		(8.7)		—
Other, net		5.8		5.6		4.3		6.0
Provision/(benefit) for income taxes	$	0.6	$	7.8	$	7.4	$	21.6