PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Discount Rates and Rates of Compensation Increase (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
United States Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rates	4.50%	5.40%
United States Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rates	4.10%	5.00%
Canadian Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rates	4.90%	5.30%
Canadian Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rates	4.80%	5.20%
Pension
Defined Benefit Plan Disclosure [Line Items]
Election of lum sum or installment distributions (U.S. salaried and nonqualified plans only)	60.00%	65.00%
Salaried | Canadian Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase		3.50%
Hourly | United States Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.00%	3.00%
Hourly | United States Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.00%	3.00%
Hourly | Canadian Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.25%	3.25%
Fiscal Year 2010 | Salaried | United States Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase		1.75%
Fiscal Year 2010 | Salaried | Canadian Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase		1.75%
Fiscal Year 2011 | Salaried | United States Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	2.00%	2.00%
Fiscal Year 2011 | Salaried | Canadian Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	2.00%	2.00%
Fiscal Year 2011 | Salaried | Canadian Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	2.00%
Fiscal Year 2012 | Salaried | United States Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	2.00%
Fiscal Year 2012 | Salaried | Canadian Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	2.10%
Fiscal Year 2012 | Salaried | Canadian Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	2.10%
Thereafter | Salaried | United States Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.50%	3.50%
Thereafter | Salaried | Canadian Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.50%	3.50%
Thereafter | Salaried | Canadian Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.50%