Derivatives (Forward Contracts) (Details) In Millions, unless otherwise specified			12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2013 JPY (¥)	Dec. 31, 2013 Forward contracts USD ($)	Dec. 31, 2012 Forward contracts USD ($)	Dec. 31, 2013 Forward contracts SEK
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 1,900.0	¥ 203,600.0	$ 20.4	$ 31.2	131.3
Changes in derivative instruments
Beginning of period			(0.1)	0
Purchases			0	0
Realized and unrealized gains (losses)			0.1	0.3
Sales/settlements			0.1	0.2
Ending balance			$ (0.1)	$ (0.1)