FINANCIAL INSTRUMENTS Financial Instruments Recorded at Carrying Amount (Details) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt		$ 2,252	$ 2,263
Project Debt		383	198
Accounts Receivable, Net, Noncurrent		1	2
Reported Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accounts Receivable, Fair Value Disclosure	[1]	333	314
Long-term Debt		2,252	2,263
Project Debt		383	198
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accounts Receivable, Fair Value Disclosure	[1]	333	314
Long-term Debt		2,237	2,244
Project Debt		$ 387	$ 206

[1] Includes $1 million and $2 million of noncurrent receivables in other noncurrent assets in the consolidated balance sheets as of December 31, 2016 and 2015.In addition to the recurring fair value measurements, certain assets are measured at fair value on a non-recurring basis when an indication of impairment is identified and the assets fair value is determined to be less than its carrying value. See Note 14. Supplementary Information - Impairment Charges for additional information.