Fair Value Measurements (Details 2) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Estimate of Fair Value Measurement [Member]
Asset Category
Money market accounts	$ 29.2	$ 15.4
Available for sale equity securities	2.3	2.3
Derivatives	0.7
Total	32.2	17.7
Liability Category
Long term contingent consideration	67.5	63.9
Derivatives		0.1
Total	67.5	64.0
Fair Value, Inputs, Level 1 [Member]
Asset Category
Money market accounts	29.2	15.4
Available for sale equity securities	1.5	1.5
Derivatives	0.0
Total	30.7	16.9
Liability Category
Long term contingent consideration	0.0	0.0
Derivatives		0.0
Total	0.0	0.0
Fair Value, Inputs, Level 2 [Member]
Asset Category
Money market accounts	0.0	0.0
Available for sale equity securities	0.8	0.8
Derivatives	0.7
Total	1.5	0.8
Liability Category
Long term contingent consideration	0.0	0.0
Derivatives		0.1
Total	0.0	0.1
Fair Value, Inputs, Level 3 [Member]
Asset Category
Money market accounts	0.0	0.0
Available for sale equity securities	0.0	0.0
Derivatives	0.0
Total	0.0	0.0
Liability Category
Long term contingent consideration	67.5	63.9
Derivatives		0.0
Total	$ 67.5	$ 63.9