Other Income / Expense Other Income / Expense (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	1 Months Ended				3 Months Ended				9 Months Ended
	Dec. 01, 2014	Oct. 31, 2014		Jul. 31, 2014		Mar. 31, 2015		Mar. 31, 2014		Mar. 31, 2015		Mar. 31, 2014
Other Income and Expenses [Abstract]
Extinguishment of Debt, Gain (Loss), Net of Tax	$ (1.2)					$ 0		$ 0		$ (21.8)		$ 0
Business Combination, Bargain Purchase, Gain Recognized, Amount Net of Tax		3.2	[1]	7.0	[1]	0	[1]	0	[1]	10.2	[1]	0	[1]
(Gain) / Loss on Contract Termination						0	[2]	0	[2]	29.8	[2]	0	[2]
Foreign Currency Transaction (Gain) / Loss, Unrealized						(0.5)		4.5		(5.4)		1.5
Other Nonoperating (Income) Expense						1.3		0.7		2.5		1.3
Nonoperating Income (Expense)						$ (0.8)		$ (5.2)		$ (38.5)		$ (2.8)

[1] Included within Other (income) / expense,net are gains associated with acquisitions completed during the respective periods. Such income events are non-standard in nature and not reflective of the Company's core operating results. During the nine month period ended March 31, 2015, the Company recorded a gain of $3.2 million on the re-measurement of a cost investment in an entity which became a wholly owned subsidiary as of October 2014 and a $7.0 million bargain purchase gain for an acquisition completed in July 2014.

[2] The Company paid a sponsor advisory agreement termination fee of $29.8 million in connection with its IPO.