INCOME TAXES - Additional Textual (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
INCOME TAXES
Net operating losses to offsets gains	$ 15,000,000	$ 13,000,000
Increase (decrease) in valuation allowance	491,000,000	507,000,000
Valuation allowance against deferred tax assets	1,857,000,000	1,366,000,000
Research and development tax credits	129,000,000	134,000,000
Unrecognized tax benefits including interest and penalties	423,000,000	344,000,000
Portion of unrecognized tax benefits, if recognized, would affect the Company's effective tax rate	185,000,000	127,000,000
Portion of unrecognized tax benefits that would not impact effective tax rate	238,000,000
Increase to unrecognized tax benefits related to current and prior year tax positions	16,000,000	5,000,000
Increase (decrease) to unrecognized tax benefits related to current and prior year tax positions	63,000,000	(21,000,000)
Accrued interest and penalties related to unrecognized tax benefits	39,000,000	46,000,000
Reduction recognized in interest and penalties	7,000,000	7,000,000
Estimated unrecognized tax benefits realized during the next 12 months	0
Pooled Scientific Research and Experimental Development
INCOME TAXES
Tax credit carryforward	195,000,000	188,000,000
US-Federal
INCOME TAXES
Net operating losses to offsets gains	2,000,000,000
Valuation allowance against deferred tax assets	651,000,000	2,750,000,000
Research and development tax credits	91,000,000	85,000,000
Canadian Federal and Provincial
INCOME TAXES
Accumulated losses available for federal and provincial purposes	3,456,000,000	1,800,000,000
Unclaimed investment tax credits and research and development credits	34,000,000	33,000,000
Valuation allowance against deferred tax assets	1,328,000,000	$ 973,000,000
Foreign Tax Authority
INCOME TAXES
Income tax credits and adjustments	$ 342,000,000