SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Disclosure Text Block Supplement [Abstract]
Temporary investments	$ 871		$ 871		$ 738
Allowance for doubtful accounts	72		72		70
Accumulated depreciation	21,220		21,220		$ 20,700
Depreciation expense	$ 284	$ 306	551	$ 610
Interest payments			$ 333	$ 349