Fair Value Measurements (Details 2) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Estimate of Fair Value Measurement [Member]
Asset Category
Money market accounts	$ 21.1	$ 15.4
Available for sale equity securities	5.9	2.3
Derivatives	4.0
Total	31.0	17.7
Liability Category
Long term contingent consideration	66.6	63.9
Derivatives	3.0	0.1
Total	69.6	64.0
Fair Value, Inputs, Level 1 [Member]
Asset Category
Money market accounts	21.1	15.4
Available for sale equity securities	5.2	1.5
Derivatives	0
Total	26.3	16.9
Liability Category
Long term contingent consideration	0	0
Derivatives	0	0
Total	0	0
Fair Value, Inputs, Level 2 [Member]
Asset Category
Money market accounts	0	0
Available for sale equity securities	0.7	0.8
Derivatives	4.0
Total	4.7	0.8
Liability Category
Long term contingent consideration	0	0
Derivatives	3.0	0.1
Total	3.0	0.1
Fair Value, Inputs, Level 3 [Member]
Asset Category
Money market accounts	0	0
Available for sale equity securities	0	0
Derivatives	0
Total	0	0
Liability Category
Long term contingent consideration	66.6	63.9
Derivatives	0	0
Total	$ 66.6	$ 63.9