SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Disclosure Text Block Supplement [Abstract]
Temporary investments	$ 727		$ 757
Allowance for doubtful accounts	72		70
Accumulated depreciation	22,000		$ 21,600
Depreciation expense	324	$ 267
Interest payments	$ 212	$ 136