LAWSUITS, CLAIMS, COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
State of New Jersey Member
Lawsuits, commitments and contingencies
State of New Jersey	State of New Jersey
Payment persuant to settlement agreement	$ 190
Long term purchase and contractual obligations
Purchase obligations
Total purchase obligations	9,900
Purchase obligations, due in fiscal year 2016	1,900
Purchase obligations, due in fiscal year 2017	1,400
Purchase obligations, due in fiscal year 2018	1,000
Purchase obligations, due in fiscal year 2019	800
Purchase obligations, due in fiscal year 2020	600
Capital Additions
Lawsuits, commitments and contingencies
Commitments for major fixed and determinable capital expenditures included in future purchase obligations	$ 800