Derivative Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Derivative
Gain (loss) on discontinuation of cash flow hedge due to forecasted transaction probable of not occurring, net	$ (1.0)	$ (0.9)
Cash flow hedges of forecasted transactions, net of tax, in accumulated OCI gain (loss)	(40.8)		$ (87.1)
Cash flow hedge gain (loss) expected to be reclassified within 12 months	$ (25.6)
Hedges maturity year	2017