EMPLOYEE BENEFIT PLANS (Details 3) (PLC)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Pension Plan
Weighted-average assumptions used to determine benefit obligations
Discount rate (as a percent)	4.86%	4.07%
Rate of compensation increase (as a percent)	3.00%	3.00%
Expected long-term return on plan assets (as a percent)	7.50%	7.50%
Period for which annualized returns are obtained for each asset class	25 years
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate (as a percent)	4.07%	4.62%	5.30%
Rate of compensation increase (as a percent)	3.00%
Expected long-term return on plan assets (as a percent)	7.50%	7.75%	7.75%
Defined Benefit Pension Plan | Minimum
Weighted-average assumptions used to determine net periodic benefit cost
Rate of compensation increase (as a percent)		2.50%	2.50%
Defined Benefit Pension Plan | Maximum
Weighted-average assumptions used to determine net periodic benefit cost
Rate of compensation increase (as a percent)		3.00%	3.00%
Unfunded Excess Benefits Plan
Weighted-average assumptions used to determine benefit obligations
Discount rate (as a percent)	4.30%	3.37%
Rate of compensation increase (as a percent)	4.00%	4.00%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate (as a percent)	3.37%	4.07%	4.79%
Rate of compensation increase (as a percent)	4.00%
Unfunded Excess Benefits Plan | Minimum
Weighted-average assumptions used to determine net periodic benefit cost
Rate of compensation increase (as a percent)		3.50%	3.50%
Unfunded Excess Benefits Plan | Maximum
Weighted-average assumptions used to determine net periodic benefit cost
Rate of compensation increase (as a percent)		4.00%	4.00%
Retiree medical plan
Weighted-average assumptions used to determine benefit obligations
Discount rate (as a percent)	1.26%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate (as a percent)	1.09%
Group life insurance plan
Weighted-average assumptions used to determine benefit obligations
Discount rate (as a percent)	5.05%
Expected long-term return on plan assets (as a percent)	3.13%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate (as a percent)	4.10%
Expected long-term return on plan assets (as a percent)	3.26%