Derivatives (Unrealized and Realized Derivative Gains (Losses) Forward Contracts) (Details) (Forward Contracts, USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Realized and unrealized gains (losses)	$ (0.2)	$ 0	$ 0.2	$ 0
Derivative, fair value, net	(0.1)	0	(0.1)	0	(0.2)	(0.1)	0	0
United States of America, Dollars
Derivative [Line Items]
Realized and unrealized gains (losses)	(0.4)	0	(0.7)	0
Derivative, fair value, net	(0.2)		(0.2)			0
Sweden, Kronor
Derivative [Line Items]
Realized and unrealized gains (losses)	0	0	0	0
Derivative, fair value, net	0		0			0
Euro Member Countries, Euro
Derivative [Line Items]
Realized and unrealized gains (losses)	0	0	0	0
Derivative, fair value, net	0.1		0.1			(0.1)
United Kingdom, Pounds
Derivative [Line Items]
Realized and unrealized gains (losses)	0.2	0	0.9	0
Derivative, fair value, net	$ 0		$ 0			$ 0