BUSINESS COMBINATIONS - Identifiable intangible assets (Details) - USD ($) $ in Millions		6 Months Ended
	Apr. 01, 2015	Jun. 30, 2015	Dec. 31, 2014
Salix
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)	11 years
Total identifiable intangible assets acquired	$ 6,756.3
Salix | Product brands
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)	10 years
Total identifiable intangible assets acquired	$ 6,088.3
Salix | Corporate brand
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)	20 years
Total identifiable intangible assets acquired	$ 668.0
2014 Acquisitions
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)		10 years
Total identifiable intangible assets acquired		$ 711.8
2014 Acquisitions | Amounts Recognized as of Acquisition Date (as previously reported)
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			$ 697.2
2014 Acquisitions | Measurement Period Adjustments
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			14.6
2014 Acquisitions | Product brands
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)		10 years
Total identifiable intangible assets acquired		$ 504.3
2014 Acquisitions | Product brands | Amounts Recognized as of Acquisition Date (as previously reported)
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			506.0
2014 Acquisitions | Product brands | Measurement Period Adjustments
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			(1.7)
2014 Acquisitions | Product rights
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)		8 years
Total identifiable intangible assets acquired		$ 91.9
2014 Acquisitions | Product rights | Amounts Recognized as of Acquisition Date (as previously reported)
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			95.2
2014 Acquisitions | Product rights | Measurement Period Adjustments
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			(3.3)
2014 Acquisitions | Corporate brand
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)		15 years
Total identifiable intangible assets acquired		$ 30.6
2014 Acquisitions | Corporate brand | Amounts Recognized as of Acquisition Date (as previously reported)
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			28.9
2014 Acquisitions | Corporate brand | Measurement Period Adjustments
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			1.7
2014 Acquisitions | In-licensed products
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)		9 years
Total identifiable intangible assets acquired		$ 1.2
2014 Acquisitions | In-licensed products | Amounts Recognized as of Acquisition Date (as previously reported)
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			1.5
2014 Acquisitions | In-licensed products | Measurement Period Adjustments
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			(0.3)
2014 Acquisitions | Partner relationships
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)		9 years
Total identifiable intangible assets acquired		$ 41.7
2014 Acquisitions | Partner relationships | Amounts Recognized as of Acquisition Date (as previously reported)
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			37.5
2014 Acquisitions | Partner relationships | Measurement Period Adjustments
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			4.2
2014 Acquisitions | Other
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)		9 years
Total identifiable intangible assets acquired		$ 42.1
2014 Acquisitions | Other | Amounts Recognized as of Acquisition Date (as previously reported)
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			28.1
2014 Acquisitions | Other | Measurement Period Adjustments
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			14.0
Other 2015 Acquisitions
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)		8 years
Total identifiable intangible assets acquired		$ 882.1
Other 2015 Acquisitions | Amounts Recognized as of Acquisition Date (as previously reported)
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			874.7
Other 2015 Acquisitions | Measurement Period Adjustments
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			7.4
Other 2015 Acquisitions | Product brands
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)		7 years
Total identifiable intangible assets acquired		$ 603.8
Other 2015 Acquisitions | Product brands | Amounts Recognized as of Acquisition Date (as previously reported)
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			603.3
Other 2015 Acquisitions | Product brands | Measurement Period Adjustments
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			0.5
Other 2015 Acquisitions | Product rights
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)		3 years
Total identifiable intangible assets acquired		$ 43.0
Other 2015 Acquisitions | Product rights | Amounts Recognized as of Acquisition Date (as previously reported)
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			42.6
Other 2015 Acquisitions | Product rights | Measurement Period Adjustments
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			0.4
Other 2015 Acquisitions | Partner relationships
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)		8 years
Total identifiable intangible assets acquired		$ 7.8
Other 2015 Acquisitions | Partner relationships | Amounts Recognized as of Acquisition Date (as previously reported)
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			7.8
Other 2015 Acquisitions | Partner relationships | Measurement Period Adjustments
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			0.0
Other 2015 Acquisitions | Technology/know-how
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)		10 years
Total identifiable intangible assets acquired		$ 225.5
Other 2015 Acquisitions | Technology/know-how | Amounts Recognized as of Acquisition Date (as previously reported)
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			219.0
Other 2015 Acquisitions | Technology/know-how | Measurement Period Adjustments
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			6.5
Other 2015 Acquisitions | Other
Business Acquisition [Line Items]
Weighted- Average Useful Lives (Years)		6 years
Total identifiable intangible assets acquired		$ 2.0
Other 2015 Acquisitions | Other | Amounts Recognized as of Acquisition Date (as previously reported)
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			2.0
Other 2015 Acquisitions | Other | Measurement Period Adjustments
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			$ 0.0