PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Recognized gain for plan amendment	$ 0	$ (51)	$ 0	$ (103)
Increase in fair value of pension assets	56
Increase in projected benefit obligation	55
Net effect in the funded status	1
Canadian Registered and Non registered Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to benefit plans during 2013	79		79
U.S. Non-Qualified Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to benefit plans during 2013	19		19
U.S. Qualified Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to benefit plans during 2013	0		0
U.S. and Canadian Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to benefit plans during 2013	$ 37		$ 37