Derivatives (Tranzact Interest Rate Swap) (Details) In Millions, unless otherwise specified	Mar. 31, 2015 USD ($)	Mar. 31, 2015 JPY (¥)	Dec. 31, 2014 USD ($)	Dec. 31, 2014 JPY (¥)	Mar. 31, 2015 Tranzact [Member] Tranzact Bank Facility [Member] USD ($)	Dec. 31, 2014 Tranzact [Member] Tranzact Bank Facility [Member] USD ($)	Oct. 10, 2014 Tranzact [Member] Tranzact Bank Facility [Member] USD ($)	Mar. 31, 2015 Minimum Tranzact [Member] Tranzact Bank Facility [Member]	Mar. 31, 2015 Interest Rate Swap [Member] Tranzact [Member] USD ($)	Oct. 10, 2014 Interest Rate Swap [Member] Tranzact [Member]
Derivative [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding					$ 70.6	$ 67.4	$ 70.0
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate					4.172%
LIBOR rate								4.00%
Notional amount	1,000.0	117,800.0	1,100.0	134,200.0	67.4
Derivative, Fixed Interest Rate									1.34%
Derivative, Variable Interest Rate									0.178%	0.1518%
Debt Instrument, Interest Rate, Effective Percentage									5.30%
Derivative, fair value, net									$ (0.5)