SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Disclosure Text Block Supplement [Abstract]
Temporary investments	$ 663		$ 663		$ 757
Allowance for doubtful accounts	78		78		70
Accumulated depreciation	22,700		22,700		$ 21,600
Depreciation expense	$ 341	$ 294	997	$ 845
Interest payments			$ 600	$ 511