EMPLOYEE BENEFITS (Fair Value of Plan Assets Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2012 Securities
Equity Funds | Research equity portfolio | Minimum
Defined Benefit Plan Disclosure
Number of securities	110
Equity Funds | Research equity portfolio | Maximum
Defined Benefit Plan Disclosure
Number of securities	130
Equity Funds | Research equity portfolio | Information technology
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	18.00%
Equity Funds | Research equity portfolio | Financials
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	16.00%
Equity Funds | Research equity portfolio | Health care
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	13.00%
Equity Funds | Research equity portfolio | Energy
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	11.00%
Equity Funds | Research equity portfolio | Consumer discretionary
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	14.00%
Equity Funds | Research equity portfolio | Other sectors
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	17.00%
Equity Funds | Research equity portfolio | Consumer staples
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	11.00%
Equity Funds | International stock funds
Defined Benefit Plan Disclosure
Number of funds	3
Equity Funds | International stock funds | Minimum
Defined Benefit Plan Disclosure
Number of securities	50
Equity Funds | International stock funds | Maximum
Defined Benefit Plan Disclosure
Number of securities	100
Equity Funds | International stock funds | Information technology
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	12.00%
Equity Funds | International stock funds | Financials
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	25.00%
Equity Funds | International stock funds | Health care
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	16.00%
Equity Funds | International stock funds | Consumer discretionary
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	13.00%
Equity Funds | International stock funds | Other sectors
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	34.00%
Equity Funds | International stock funds | Asian (excluding japanese) | Information technology
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	15.00%
Equity Funds | International stock funds | Asian (excluding japanese) | Financials
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	32.00%
Equity Funds | International stock funds | Asian (excluding japanese) | Consumer discretionary
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	12.00%
Equity Funds | International stock funds | Asian (excluding japanese) | Other sectors
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	27.00%
Equity Funds | International stock funds | Asian (excluding japanese) | Consumer staples
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	14.00%
Equity Funds | International stock funds | Emerging markets
Defined Benefit Plan Disclosure
Number of positions in portfolio	80
Maximum percentage of investments within fund allocated to one country	25.00%
Equity Funds | International stock funds | Emerging markets | Information technology
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	19.00%
Equity Funds | International stock funds | Emerging markets | Financials
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	18.00%
Equity Funds | International stock funds | Emerging markets | Energy
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	17.00%
Equity Funds | International stock funds | Emerging markets | Materials
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	15.00%
Equity Funds | International stock funds | Emerging markets | Other sectors
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	31.00%
Fixed Income Funds | Short-term fund | Other sectors
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	25.00%
Fixed Income Funds | Short-term fund | Investment grade
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	29.00%
Fixed Income Funds | Short-term fund | Government-related
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	33.00%
Fixed Income Funds | Short-term fund | Mortgage
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	13.00%
Fixed Income Funds | Bond fund
Defined Benefit Plan Disclosure
Number of funds	2
The maximum of the portfolio invested in securities below Baa grade (as a percent)	10.00%
The maximum of the portfolio invested in non-U.S. dollar denominated securities (as a percent)	30.00%
Fixed Income Funds | Bond fund | Minimum
Defined Benefit Plan Disclosure
Intermediate maturity fixed income securities debt maturity date (in years)	3 years
Fixed Income Funds | Bond fund | Maximum
Defined Benefit Plan Disclosure
Intermediate maturity fixed income securities debt maturity date (in years)	6 years
Fixed Income Funds | Bond fund | Other sectors
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	14.00%
Fixed Income Funds | Bond fund | Investment grade
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	10.00%
Fixed Income Funds | Bond fund | Government-related
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	25.00%
Fixed Income Funds | Bond fund | Non-U.S. dollar developed market
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	11.00%
Fixed Income Funds | Bond fund | Mortgage
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	40.00%
Fixed Income Funds | Bond fund | Emerging markets
Defined Benefit Plan Disclosure
Number of positions in portfolio	80
Maximum percentage of investments within fund allocated to one country	25.00%
Fixed Income Funds | Bond fund | Emerging markets | Sovereign Local
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	41.00%
Fixed Income Funds | Bond fund | Emerging markets | Inflation linked
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	30.00%
Fixed Income Funds | Bond fund | Emerging markets | Corporates
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	22.00%
Fixed Income Funds | Bond fund | Emerging markets | Sovereign USD
Defined Benefit Plan Disclosure
Sector weighting based on industry, (in percent of the total)	7.00%