INCOME TAXES (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
(Loss) Income before provision for (recovery of) income taxes	$ (155.3)	$ 1,053.6	$ (1,314.4)
Expected Canadian statutory rate	26.90%	26.90%	26.90%
Expected (recovery) provision for of income taxes	$ (41.8)	$ 283.4	$ (353.6)
Non-deductible amounts:
Share-based compensation	4.4	19.8	13.1
Merger and acquisition costs	3.1	0.0	1.1
Adjustments to tax attributes	(87.1)	(32.3)	(3.0)
Non-taxable gain on disposal of investments	0.0	(50.1)	0.0
Changes in enacted income tax rates	0.0	29.6	6.6
Canadian dollar foreign exchange gain for Canadian tax purposes	173.6	22.8	0.6
Change in valuation allowance related to foreign tax credits and net operating losses	114.0	17.4	70.2
Change in valuation allowance on Canadian deferred tax assets and tax rate changes	229.4	255.2	143.9
Pharma fee	15.9	3.5	0.0
Change in uncertain tax positions	(0.1)	(1.8)	0.0
Foreign tax rate differences	(350.0)	(502.8)	(407.6)
Withholding taxes on foreign income	6.7	3.7	3.4
Taxable foreign income	441.4	269.0	55.4
Tax benefit on intra-entity transfers	(374.9)	(147.3)	(5.7)
Other	(2.1)	4.1	24.8
Provision for (recovery of) income taxes	$ 132.5	$ 174.2	$ (450.8)