Fair Value Measurements (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			3 Months Ended				3 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2014 Interest Rate Swap [Member]	Sep. 30, 2013 Interest Rate Swap [Member]	Sep. 30, 2014 Notes [Member]	Jun. 30, 2014 Notes [Member]	Sep. 30, 2014 Term Loan Facility [Member]	Jun. 30, 2014 Term Loan Facility [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Carrying value of the notes	$ 3,255.7	$ 3,260.8	$ 1,749.8			$ 1,250.0	$ 1,250.0	$ 1,986.0	$ 1,990.2
Fair value of the notes						1,308.5	1,294.8
Floor rate								1.00%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum								3.00%
Hypothetical interest rate increase				1.00%				1.00%
Hypothetical annual interest expense	24.6
Change in fair value of interest rate swap				(2.0)	2.3
Hypothetical increase to interest rate swap fair value	$ 16.5