ACQUISITIONS, GOODWILL AND OTHER INTANGIBLE ASSETS - Other Intangible Assets - Net (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Business Combinations [Abstract]
Intangible assets subject to amortization	$ 18,412	$ 18,056
Indefinite-lived intangible assets	2,249	2,217
Total	$ 20,661	$ 20,273