INCOME TAXES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Income tax Expense Benefit
Income tax expense (benefit)	$ 25.1	$ (27.3)
Valuation allowance against deferred tax assets	504.7		477.6
Unrecognized tax benefits including interest and penalties	241.0
Unrecognized tax benefits related to interest and penalties	46.5
Portion of unrecognized tax benefits, if recognized, would reduce the Company's effective tax rate	146.9
Estimated amount of unrecognized tax benefits that may be resolved within the next 12 months	8.7
Accrued interest related to unrecognized tax benefits	1.3
Accrued penalties related to unrecognized tax benefits	0.3
Prior Period Adjustment [Member]
Income tax Expense Benefit
Income tax expense (benefit)	13.3
Outside of Canada
Income tax Expense Benefit
Income tax expense (benefit)	24.4
Canada
Income tax Expense Benefit
Income tax expense (benefit)	$ 0.7