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CONSOLIDATED DEBT Union County EfW Capital Lease Arrangement (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Project Debt Type [Member]      
Debt Instrument [Line Items]      
Capital Lease Obligations $ 101 $ 0 $ 104
Debt Instrument, Interest Rate, Stated Percentage 5.00%    
Fiscal Year 2016 [Member]      
Debt Instrument [Line Items]      
Debt Future Amortization Expense $ 1    
Fiscal Year 2016 [Member] | Project Debt Type [Member]      
Debt Instrument [Line Items]      
Debt Future Amortization Expense 2    
Fiscal Year 2017 [Member]      
Debt Instrument [Line Items]      
Debt Future Amortization Expense 5    
Fiscal Year 2017 [Member] | Project Debt Type [Member]      
Debt Instrument [Line Items]      
Debt Future Amortization Expense 5    
Fiscal Year 2018 [Member]      
Debt Instrument [Line Items]      
Debt Future Amortization Expense 5    
Fiscal Year 2018 [Member] | Project Debt Type [Member]      
Debt Instrument [Line Items]      
Debt Future Amortization Expense 5    
Fiscal Year 2019 [Member]      
Debt Instrument [Line Items]      
Debt Future Amortization Expense 5    
Fiscal Year 2019 [Member] | Project Debt Type [Member]      
Debt Instrument [Line Items]      
Debt Future Amortization Expense 5    
Fiscal Year 2020 [Member]      
Debt Instrument [Line Items]      
Debt Future Amortization Expense 182    
Fiscal Year 2020 [Member] | Project Debt Type [Member]      
Debt Instrument [Line Items]      
Debt Future Amortization Expense 6    
Fiscal Year after 2020 [Member] [Member] | Project Debt Type [Member]      
Debt Instrument [Line Items]      
Debt Future Amortization Expense $ 78