RESTRUCTURING, INTEGRATION AND OTHER COSTS - Narrative (Details) $ in Millions	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) employee	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Cost-rationalization and integration initiatives
Acquisition-related costs, since acquisition date	$ 0.0		$ 9.5	$ 1.8	$ 23.4
Salix
Cost-rationalization and integration initiatives
Estimated integration costs				300.0
Restructuring and acquisition-related costs since acquisition date				240.0
Integration expenses related to acquisition, since acquisition date				125.0
Restructuring expenses related to acquisition, since acquisition date				100.0
Acquisition-related costs, since acquisition date				$ 15.0
Approximate number of employees expected to be terminated | employee				475
Integration/other charges incurred				$ 15.0	29.0
Payments for integration costs				19.0	16.0
Restructuring payments	$ 11.4	$ 11.4				$ 58.1
Other Restructuring, Integration-related and Other Costs
Cost-rationalization and integration initiatives
Integration/other charges incurred					1.0
Incurred restructuring costs				34.0	87.0
Restructuring costs integration consulting duplicate labor transition service and other				24.0	60.0
Severance costs				6.0	23.0
Business exit costs				4.0	3.0
Restructuring payments				$ 39.0	$ 101.0