DISPOSITIONS, ASSETS HELD FOR SALE AND DISCONTINUED OPERATIONS Dublin EfW Project (Details) € in Millions, $ in Millions	Feb. 12, 2018 EUR (€)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Assets Held for Sale [Abstract]
Assets held for sale		$ 653	$ 0
Liabilities Held for Sale [Abstract]
Project Debt, Held for Sale		510
Liabilities held for sale		$ 540	0
Dublin EfW Facility [Member]
Long Lived Assets Held-for-sale [Line Items]
Equity Method Investment, Ownership Percentage		50.00%
Assets Held for Sale [Abstract]
Restricted Cash and Investments, Current		$ 77
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net		10
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment		563
Disposal Group, Including Discontinued Operation, Other Assets		3
Liabilities Held for Sale [Abstract]
Disposal Group, Including Discontinued Operation, Accounts Payable		1
Disposal Group, Including Discontinued Operation, Accrued Liabilities		22
Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities		$ 7	$ 0
Subsequent Event [Member] | Dublin EfW Facility [Member]
Long Lived Assets Held-for-sale [Line Items]
Proceeds from Sale of Equity Method Investments | €	€ 136