SEGMENT INFORMATION (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) segment	Jun. 30, 2015 USD ($)
Segment reporting information
Number of operating segments | segment			2
Number of reportable segments | segment			2
Total revenues	$ 2,420.2	$ 2,732.4	$ 4,791.8	$ 4,902.5
Net (loss) income	(304.0)	(51.6)	(676.9)	46.9
Restructuring, integration and other costs	(19.5)	(143.4)	(57.5)	(198.4)
In-process research and development impairments and other charges	(17.4)	(12.3)	(17.9)	(12.3)
Acquisition-related costs	0.0	(9.5)	(1.8)	(23.4)
Acquisition-related contingent consideration	(6.9)	(11.7)	(9.3)	(18.8)
Other income (expense)	(45.3)	176.9	(22.7)	183.0
Operating income	80.5	341.5	146.7	912.5
Interest income	2.1	0.9	3.0	1.8
Interest expense	(472.5)	(412.7)	(899.1)	(710.5)
Loss on extinguishment of debt	0.0	0.0	0.0	(20.0)
Foreign exchange and other	13.1	5.6	6.9	(65.5)
(Loss) income before (recovery of) provision for income taxes	(376.8)	(64.7)	(742.5)	118.3
Share-based compensation expense	33.7	25.9	97.2	60.9
Operating Segment
Segment reporting information
Total revenues	2,420.2	2,732.4	4,791.8	4,902.5
Net (loss) income	156.0	756.8	433.9	1,479.1
Segment Reconciling Items
Segment reporting information
Net (loss) income	(77.0)	(61.5)	(223.4)	(130.7)
Restructuring, integration and other costs	(19.5)	(143.4)	(57.5)	(198.4)
In-process research and development impairments and other charges	(17.4)	(12.3)	(17.9)	(12.3)
Acquisition-related costs	0.0	(9.5)	(1.8)	(23.4)
Acquisition-related contingent consideration	(6.9)	(11.7)	(9.3)	(18.8)
Other income (expense)	45.3	(176.9)	22.7	(183.0)
Corporate
Segment reporting information
Share-based compensation expense	70.0	14.0	20.0	38.0
Developed Markets | Fair Value Adjustment to Inventory and Identifiable Intangible Assets
Segment reporting information
Net (loss) income	808.0	555.0	1,450.0	870.0
Developed Markets | 2014 and 2015 Acquisitions
Segment reporting information
Total revenues	24.0		537.0
Developed Markets | Operating Segment
Segment reporting information
Total revenues	1,923.5	2,237.6	3,853.4	3,981.2
Net (loss) income	107.6	678.5	367.2	1,346.2
Emerging Markets | Fair Value Adjustment to Inventory and Identifiable Intangible Assets
Segment reporting information
Net (loss) income	87.0	76.0	173.0	151.0
Emerging Markets | 2014 and 2015 Acquisitions
Segment reporting information
Total revenues	57.0		115.0
Emerging Markets | Operating Segment
Segment reporting information
Total revenues	496.7	494.8	938.4	921.3
Net (loss) income	$ 48.4	$ 78.3	$ 66.7	$ 132.9