PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Additional Information (Detail) (USD $)	12 Months Ended						3 Months Ended	6 Months Ended	12 Months Ended			12 Months Ended				3 Months Ended					12 Months Ended																		12 Months Ended				3 Months Ended	12 Months Ended	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Qualified and Registered Pension Plans	Dec. 31, 2012 Qualified and Registered Pension Plans	Dec. 31, 2011 Qualified and Registered Pension Plans	Jun. 30, 2013 Pension	Jun. 30, 2013 Pension	Dec. 31, 2013 Pension	Dec. 31, 2012 Pension	Dec. 31, 2011 Pension	Dec. 31, 2013 Registered Canadian Pension Plans	Dec. 31, 2013 United States Pension Plans	Dec. 31, 2011 United States Pension Plans	Dec. 31, 2012 United States Pension Plans	Dec. 31, 2011 Canadian Pension Plans	Dec. 31, 2013 Canadian Pension Plans	Dec. 31, 2012 Canadian Pension Plans	Dec. 31, 2013 United States Other Postretirement Benefit Plans	Dec. 31, 2012 United States Other Postretirement Benefit Plans	Dec. 31, 2013 Other Postretirement Benefits	Dec. 31, 2012 Other Postretirement Benefits	Dec. 31, 2011 Other Postretirement Benefits	Dec. 31, 2013 Non-Qualified U.S. Pension Plans	Dec. 31, 2013 Qualified U.S. Pension Plans	Dec. 31, 2013 Non Registered Canadian Pension Plans	Dec. 31, 2012 Non Registered Canadian Pension Plans	Dec. 31, 2011 Non Registered Canadian Pension Plans	Dec. 31, 2013 Canada	Dec. 31, 2012 Canada	Dec. 31, 2013 U.S.	Dec. 31, 2012 U.S.	Dec. 31, 2013 Fair Value, Inputs, Level 3	Dec. 31, 2012 Fair Value, Inputs, Level 3	Dec. 31, 2011 Fair Value, Inputs, Level 3	Dec. 31, 2013 Fair Value, Inputs, Level 3 Pension	Dec. 31, 2013 Fair Value, Inputs, Level 3 Non Registered Canadian Pension Plans	Dec. 31, 2012 Fair Value, Inputs, Level 3 Non Registered Canadian Pension Plans	Dec. 31, 2013 Investments Qualified and Registered Pension Plans	Dec. 31, 2013 Derivatives Qualified and Registered Pension Plans	Dec. 31, 2013 Investments we are allowed to invest Non Registered Canadian Pension Plans	Dec. 31, 2013 Collective Bargaining Arrangement Other Postretirement Benefits	Dec. 31, 2011 Plan amendment	Dec. 31, 2012 Plan amendment	Dec. 31, 2011 Plan amendment United States Other Postretirement Benefit Plans	Dec. 31, 2013 Plan amendment Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Increase (reduction) in pension plan obligations	$ (733,000,000)																																										$ (16,000,000)	$ 12,000,000
Reduction in postretirement liability due to plan amendment	0	(103,000,000)	0																																										(108,000,000)	(70,000,000)
Recognized curtailment charge									0	0				(9,000,000)							0	0	0
Settlement charges																3,000,000
Special termination charges														(6,000,000)
Discount rates													4.90%		3.70%		4.70%	4.10%	4.00%	3.00%
Increase in fair value of pension assets							55,000,000	55,000,000	55,000,000	16,000,000											0	0
Employer contributions and benefit payments									103,000,000	110,000,000		79,000,000									34,000,000	35,000,000		21,000,000		3,000,000
Pension plans with accumulated benefit obligations greater than plan assets, projected benefit obligations	971,000,000	6,600,000,000
Pension plans with accumulated benefit obligations greater than plan assets, accumulated benefit obligations	948,000,000	6,400,000,000
Pension plans with accumulated benefit obligations greater than plan assets, fair value of assets	726,000,000	5,000,000,000
Accumulated benefit obligation for all defined benefit pension plans	5,700,000,000	6,400,000,000
Fair value of plan assets				5,600,000,000	5,008,000,000				5,614,000,000	5,022,000,000	4,714,000,000										0	0	0			14,000,000	14,000,000						4,935,000,000	4,439,000,000	4,159,000,000	4,900,000,000	0	0
Fair value of plan assets, percent																																				87.90%
Percentage increase in fair value of pension assets								1.10%
Expected contribution to benefit plans during 2014												53,000,000									35,000,000			20,000,000	0	3,000,000																9,000,000
Expected return on plan assets				9.00%	9.00%	9.50%																				3.50%	3.50%	4.75%											7.20%	1.80%	7.00%
Annual rate of return on assets													14.80%
Actual return (loss) on plan assets	808,000,000	490,000,000	49,000,000	808,000,000					808,000,000	490,000,000											0	0
Weighted health care cost trend rate assumed for next year																													6.10%	6.20%	6.40%	6.60%
Number of employees covered under union-administered multiemployer pension plans	1,300
Multiemployer benefit plans contributions	4,000,000	4,000,000	4,000,000
Employer contributions to defined contribution plans	$ 20,000,000	$ 19,000,000	$ 19,000,000