Fair Value Measurement (Assets and Liabilities Measured on a Recurring Basis) (Details) - Recurring Basis - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable equity securities	$ 69.7	$ 17.2
Marketable debt securities	3.7
Contingent consideration receivable	0.0	0.0
Derivative instruments	0.0	0.0
Total assets	73.4	17.2
Derivative instruments	0.0	0.0
Contingent consideration payable	0.0	0.0
Total liabilities	0.0	0.0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable equity securities	0.0	0.0
Marketable debt securities	12.8
Contingent consideration receivable	0.0	0.0
Derivative instruments	50.6	1.9
Total assets	63.4	1.9
Derivative instruments	13.3	11.5
Contingent consideration payable	0.0	0.0
Total liabilities	13.3	11.5
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable equity securities	0.0	0.0
Marketable debt securities	0.0
Contingent consideration receivable	15.7	13.8
Derivative instruments	0.0	0.0
Total assets	15.7	13.8
Derivative instruments	0.0	0.0
Contingent consideration payable	996.7	475.9
Total liabilities	996.7	475.9
Fair value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable equity securities	69.7	17.2
Marketable debt securities	16.5
Contingent consideration receivable	15.7	13.8
Derivative instruments	50.6	1.9
Total assets	152.5	32.9
Derivative instruments	13.3	11.5
Contingent consideration payable	996.7	475.9
Total liabilities	$ 1,010.0	$ 487.4