Fair Value Measurement (Assets and Liabilities That are Measured and Not Measured at Fair Value on a Recurring Basis) (Details) - Recurring Basis - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Estimated fair value
Financial assets:
Marketable equity securities	$ 16.9	$ 17.2
Contingent consideration receivable	15.3	13.8
Derivative contracts, asset	3.0	1.9
Financial liabilities:
Derivative contracts, liability	13.9	11.5
Contingent consideration payable	882.5	475.9
Level 1
Financial assets:
Marketable equity securities	16.9	17.2
Contingent consideration receivable	0.0	0.0
Derivative contracts, asset	0.0	0.0
Financial liabilities:
Derivative contracts, liability	0.0	0.0
Contingent consideration payable	0.0	0.0
Level 2
Financial assets:
Marketable equity securities	0.0	0.0
Contingent consideration receivable	0.0	0.0
Derivative contracts, asset	3.0	1.9
Financial liabilities:
Derivative contracts, liability	13.9	11.5
Contingent consideration payable	0.0	0.0
Level 3
Financial assets:
Marketable equity securities	0.0	0.0
Contingent consideration receivable	15.3	13.8
Derivative contracts, asset	0.0	0.0
Financial liabilities:
Derivative contracts, liability	0.0	0.0
Contingent consideration payable	$ 882.5	$ 475.9