Financial Instruments and Fair Value Measurement (Measurement Inputs) (Details) - Recurring basis - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Quoted Price in Active Markets for Identical Assets (Level 1)
Assets:
Available-for-sale securities	$ 925.0	$ 1,235.9
Forward currency contracts	0.0	0.0
Purchased currency options	0.0	0.0
Interest rate swaps	0.0	0.0
Total assets	925.0	1,235.9
Liabilities:
Contingent value rights	(56.7)	(51.9)
Written currency options	0.0	0.0
Other acquisition related contingent consideration	0.0	0.0
Total liabilities	(56.7)	(51.9)
Significant Other Observable Inputs (Level 2)
Assets:
Available-for-sale securities	336.8	435.7
Forward currency contracts	333.9	606.0
Purchased currency options	39.9	46.7
Interest rate swaps	122.4	52.5
Total assets	833.0	1,140.9
Liabilities:
Contingent value rights	0.0	0.0
Written currency options	(34.2)	(19.1)
Other acquisition related contingent consideration	0.0	0.0
Total liabilities	(34.2)	(19.1)
Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale securities	0.0	0.0
Forward currency contracts	0.0	0.0
Purchased currency options	0.0	0.0
Interest rate swaps	0.0	0.0
Total assets	0.0	0.0
Liabilities:
Contingent value rights	0.0	0.0
Written currency options	0.0	0.0
Other acquisition related contingent consideration	(1,549.7)	(1,521.5)
Total liabilities	(1,549.7)	(1,521.5)
Fair Value
Assets:
Available-for-sale securities	1,261.8	1,671.6
Forward currency contracts	333.9	606.0
Purchased currency options	39.9	46.7
Interest rate swaps	122.4	52.5
Total assets	1,758.0	2,376.8
Liabilities:
Contingent value rights	(56.7)	(51.9)
Written currency options	(34.2)	(19.1)
Other acquisition related contingent consideration	(1,549.7)	(1,521.5)
Total liabilities	$ (1,640.6)	$ (1,592.5)