SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Disclosure Text Block Supplement [Abstract]
Temporary investments	$ 2,100		$ 2,100		$ 738
Allowance for doubtful accounts	72		72		70
Accumulated depreciation	21,500		21,500		$ 20,700
Depreciation expense	$ 294	$ 309	845	$ 919
Interest payments			$ 511	$ 471