INCOME TAXES (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
INCOME TAXES
Increase (decrease) in valuation allowance	$ 381.6	$ 353.1
Valuation allowance against deferred tax assets	859.2	477.6
Research and development tax credits	90.5	83.7
Accumulated tax losses related to the exercise of non qualified stock options and restricted stock awards	95.5
Unrecognized tax benefits including interest and penalties	345.0	247.5
Portion of unrecognized tax benefits, if recognized, would affect the Company's effective tax rate	108.7	153.4
Portion of unrecognized tax benefits that would not impact effective tax rate	236.3
Increase to unrecognized tax benefits related to current and prior year tax positions	143.0	132.4
Decrease to unrecognized tax benefits related to current and prior year tax positions	45.5	12.8
Accrued interest and penalties related to unrecognized tax benefits	38.7	46.4
Reduction recognized in interest and penalties	7.7	5.7
Estimated unrecognized tax benefits realized during the next 12 months	4.7
Pooled Scientific Research and Experimental Development
INCOME TAXES
Tax credit carryforward	216.2	232.1
US-Federal
INCOME TAXES
Accumulated losses available for federal and provincial purposes	2,380.3	2,425.1
Research and development tax credits	71.3	64.7
Canadian Federal and Provincial
INCOME TAXES
Accumulated losses available for federal and provincial purposes	1,008.5	717.9
Unclaimed investment tax credits and research and development credits	39.2	42.3
Valuation allowance against deferred tax assets	572.0	253.6
Foreign Tax Authority
INCOME TAXES
Income tax credits and adjustments	$ 167.2