Fair Value Measurement Narrative (Details) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2015 USD ($) forward_exchange_contrtact	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2008 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investments	$ 43.6		$ 43.0
Trading securities	9.9		8.9
Purchase of trading securities related to deferred compensation plans	1.0	$ 1.2
Proceeds from securities sold	$ 0.2	$ 0.2
Number of foreign exchange contracts held | forward_exchange_contrtact	18
Derivative, notional amount	$ 1.0
Unrealized gain (loss) on interest rate lock, recorded in accumulated other comprehensive loss	(0.4)		(0.4)
Long-Term Debt	597.8		597.6
Long-term debt, fair value	$ 638.6		$ 645.1
Interest Rate Lock 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain (loss) on interest rate lock, recorded in accumulated other comprehensive loss				$ (1.6)
Interest Rate Lock 2008
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain (loss) on interest rate lock, recorded in accumulated other comprehensive loss					$ 1.2