Income Taxes (Unrecognized Tax Benefit) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits at January 1	$ 29.7	$ 27.1
Increases related to: tax positions taken during a prior period	1.3	3.6
Increases related to: tax positions taken during the current period	0.9	0.9
Decreases related to: lapse of applicable statute of limitations	(1.2)	(1.9)
Decreases related to: settlements with taxing authorities	(3.1)	0
Unrecognized tax benefits at December 31	$ 27.6	$ 29.7