INCOME TAXES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of loss before recovery of income taxes
Domestic	$ (1,516.0)	$ (851.1)	$ (574.5)
Foreign	1,360.7	1,904.7	(739.9)
(Loss) Income before provision for (recovery of) income taxes	(155.3)	1,053.6	(1,314.4)
Current:
Domestic	0.0	0.6	3.4
Foreign	76.9	150.1	80.0
Total	76.9	150.7	83.4
Deferred:
Domestic	(3.6)	0.0	0.0
Foreign	59.2	23.5	(534.2)
Total	55.6	23.5	(534.2)
Provision for (recovery of) income taxes	$ 132.5	$ 174.2	$ (450.8)