Derivatives Forward Contracts (Details) In Millions, unless otherwise specified									3 Months Ended		9 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2014 JPY (¥)	Dec. 31, 2013 USD ($)	Dec. 31, 2013 JPY (¥)	Mar. 01, 2007 USD ($)	Mar. 01, 2007 JPY (¥)	Sep. 01, 2006 USD ($)	Sep. 01, 2006 JPY (¥)	Sep. 30, 2014 Forward Contracts USD ($)	Sep. 30, 2013 Forward Contracts USD ($)	Sep. 30, 2014 Forward Contracts USD ($)	Sep. 30, 2013 Forward Contracts USD ($)	Sep. 30, 2014 Forward Contracts SEK	Dec. 31, 2013 Forward Contracts USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 1,400.0	¥ 156,800.0	$ 1,900.0	¥ 203,600.0	$ 500.0	¥ 56,000.0	$ 1,700.0	¥ 200,000.0	$ 9.4		$ 9.4		68.0	$ 20.4
Derivative, fair value, net									0.2		0.2			(0.1)
Realized and unrealized gains (losses)									0.3	(0.5)	0.2	(0.3)
Carrying Value									$ 0.2		$ 0.2			$ (0.1)