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RESTRUCTURING, INTEGRATION AND OTHER CHARGES (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013
Restructuring reserve
Costs incurred and/or charged to expense	$ 381.7us-gaap_RestructuringCharges	$ 462.0us-gaap_RestructuringCharges	$ 267.1us-gaap_RestructuringCharges
Non-cash adjustments		0
B&L
Restructuring reserve
Balance at the beginning of the period	100.3	0
Costs incurred and/or charged to expense	69.7	234.1		52.8
Cash payments	(135.6)	(138.4)
Non-cash adjustments	(11.1)	4.6
Balance at the end of the period	23.3	100.3
Medicis
Restructuring reserve
Balance at the beginning of the period	0.3	11.6	0
Costs incurred and/or charged to expense		23.5	163.0
Cash payments	(0.1)	(35.0)	(155.3)
Non-cash adjustments		0.2	3.9
Balance at the end of the period		0.3	11.6
Employee Termination Costs - Severance and Related Benefits \| B&L
Restructuring reserve
Balance at the beginning of the period	89.3	0
Costs incurred and/or charged to expense	46.0	155.7
Cash payments	(110.7)	(77.8)
Non-cash adjustments	(5.7)	11.4
Balance at the end of the period	18.9	89.3
Employee Termination Costs - Severance and Related Benefits \| Medicis
Restructuring reserve
Balance at the beginning of the period		11.4	0
Costs incurred and/or charged to expense		20.0	85.3
Cash payments		(31.4)	(78.0)
Non-cash adjustments		0.3	4.1
Balance at the end of the period		0.3	11.4
Employee Termination Costs - Share-Based Compensation \| B&L
Restructuring reserve
Balance at the beginning of the period	0	0
Costs incurred and/or charged to expense	0	52.8
Cash payments	0	(52.8)
Non-cash adjustments	0
Balance at the end of the period	0	0
Employee Termination Costs - Share-Based Compensation \| Medicis
Restructuring reserve
Balance at the beginning of the period		0	0
Costs incurred and/or charged to expense		0	77.3
Cash payments		0	(77.3)
Non-cash adjustments		0	0
Balance at the end of the period		0	0
IPR&D Termination Costs \| B&L
Restructuring reserve
Balance at the beginning of the period	0	0
Costs incurred and/or charged to expense	0	0
Cash payments	0	0
Non-cash adjustments	0	0
Balance at the end of the period	0	0
IPR&D Termination Costs \| Medicis
Restructuring reserve
Balance at the beginning of the period		0	0
Costs incurred and/or charged to expense		0	0
Cash payments		0	0
Non-cash adjustments		0	0
Balance at the end of the period		0	0
Contract Termination, Facility Closure and Other Costs \| B&L
Restructuring reserve
Balance at the beginning of the period	11.0	0
Costs incurred and/or charged to expense	23.7	25.6
Cash payments	(24.9)	(7.8)
Non-cash adjustments	(5.4)	(6.8)
Balance at the end of the period	4.4	11.0
Contract Termination, Facility Closure and Other Costs \| Medicis
Restructuring reserve
Balance at the beginning of the period		0.2	0
Costs incurred and/or charged to expense		3.5	0.4
Cash payments		(3.6)	0
Non-cash adjustments		(0.1)	(0.2)
Balance at the end of the period		$ 0	$ 0.2