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	Jun. 30, 2016	Dec. 31, 2015
Fair value
Financial assets:
Marketable equity securities	$ 54.4	$ 17.2
Contingent consideration receivable	17.5	13.8
Derivative contracts	65.3	1.9
Marketable debt securities	16.8
Financial liabilities:
Derivative contracts	40.7	11.5
Contingent consideration payable	993.8	475.9
Level 1
Financial assets:
Marketable equity securities	54.4	17.2
Contingent consideration receivable	0.0	0.0
Derivative contracts	0.0	0.0
Marketable debt securities	3.7
Financial liabilities:
Derivative contracts	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	65.3	1.9
Marketable debt securities	13.1
Financial liabilities:
Derivative contracts	40.7	11.5
Contingent consideration payable	0.0	0.0
Level 3
Financial assets:
Marketable equity securities	0.0	0.0
Contingent consideration receivable	17.5	13.8
Derivative contracts	0.0	0.0
Marketable debt securities
Financial liabilities:
Derivative contracts	0.0	0.0
Contingent consideration payable	$ 993.8	$ 475.9