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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Other Postretirement Benefits) (Details) (United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation $ 3  
Discount rate - benefit obligations 4.66% 5.15%
Initial health care cost trend rate - benefit obligations 8.28% 8.70%
Ultimate health care cost trend rate - benefit obligations 5.00% 5.00%
Year ultimate trend rate to be reached - benefit obligations 2019 2019
Discount rate - net periodic costs 5.15% 5.69%
Expected long-term rate of return on plan assets - net periodic costs 3.60% 4.35%
Initial health care cost trend rate - net periodic costs 8.70% 9.13%
Ultimate health care cost trend rate - net periodic costs 5.00% 5.00%
Year ultimate trend rate to be reached - net periodic costs 2019 2019
Defined benefit plan effect of one percentage point decrease on accumulated postretirement benefit obligation 25  
Defined benefit plan effect of one percentage point decrease on net periodic postretirement benefit cost $ 1