Derivative Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Derivative
Gain (loss) on discontinuation of cash flow hedge due to forecasted transaction probable of not occurring, net	$ 0.1	$ (3.7)	$ (0.8)	$ (4.6)
Cash flow hedges of forecasted transactions, net of tax, in accumulated OCI gain (loss)	$ (43.6)		(43.6)		$ (87.1)
Cash flow hedge gain (loss) expected to be reclassified within 12 months			$ (23.3)
Hedges maturity year			2019