Derivatives (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2011
Derivatives, Fair Value [Line Items]
Foreign exchange losses due to revaluation of derivative instruments held	$ 1.4		$ 1.4
Number of interest rate swap contracts			1
Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Foreign contracts maturing within 12 months			555.8		528.4
Ineffectiveness recognized, maximum	0	0.1	0	0.1
Excluded portion of effectiveness testing			31.6		25.2
Amount expected to be reclassified from AOCI to earnings within the next 12 months			40.8
Recognized net gains (losses) related to the change in forward points	(1.8)	0.1	(5.4)	(0.8)
Interest Rate Risk Management [Member]
Derivatives, Fair Value [Line Items]
Ineffectiveness recognized, maximum	0.1	0.1	0.1	0.1
Amount expected to be reclassified from AOCI to earnings within the next 12 months			0.6
Notional amount of interest rate derivatives	21.3		21.3		24.5
Nondesignated As Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Foreign contracts maturing within 12 months			245.0		207.5
Fair value of foreign currency derivatives not designated as hedges, asset	3.6		3.6
Fair value of foreign currency derivatives not designated as hedges, liability					$ 9.7
Maximum [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange contract maturity period, years			1