Financial Instruments and Fair Value Measurement (Level 3 Liabilities) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Oct. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Liabilities:
Balance at beginning of period		$ (1,279.0)	$ (228.5)
Amounts acquired or issued		(166.0)	(1,060.0)
Net change in fair value		(76.5)	(30.5)
Settlements		0.0	40.0
Transfers in and/or out of Level 3		0.0	0.0
Balance at end of period		(1,521.5)	$ (1,279.0)
Change in Level 3 liabilities		242.5
Quanticel
Liabilities:
Amounts acquired or issued	$ (166.0)
Avila Therapeutics, Inc.
Liabilities:
Change in Level 3 liabilities		$ 76.5