Derivative Financial Instruments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Derivative [Line Items]
Forward exchange contracts maturity term (less than) (in years)			3 years
Gain (loss) on discontinuation of cash flow hedge due to forecasted transaction probable of not occurring, net	$ (0.2)	$ 2.5	$ (0.3)	$ 3.9
Cash flow hedges of forecasted transactions, net of tax, in accumulated OCI gain (loss)	25.4		25.4		10.0
Cash flow hedge gain (loss) expected to be reclassified within 12 months			$ 10.1
Total derivative contracts, maturity date			2016