GOODWILL AND INTANGIBLE ASSETS - Changes in Goodwill (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2012
Goodwill
Balance of goodwill at beginning of period	$ 23,592,000,000
Foreign exchange translation and other	(312,000,000)
Impairment of goodwill	(16,000,000)	0	0
Divestitures, purchase accounting adjustments and other	(114,000,000)
Balance of goodwill at end of period	$ 23,150,000,000