PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Increase in fair value of pension assets		$ 57
Percentage increase in fair value of pension assets		1.00%
Increase in projected benefit obligation		$ 25
Percentage increase in projected benefit obligation (less than)		1.00%
Net effect increase in the funded status		$ 32
U.S. Qualified Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to benefit plans during 2015				$ 0
Registered Canadian Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to benefit plans during 2015				38
Non Registered Canadian Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to benefit plans during 2015				3
U.S. Non-Qualified Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to benefit plans during 2015				19
U.S. and Canadian Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Recognized gain for plan amendment	$ 0		$ (23)	0	$ (113)
Expected contribution to benefit plans during 2015				$ 25