GOODWILL AND OTHER INTANGIBLE ASSETS - Summary of Other Intangible Assets (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Finite other intangible assets, gross carrying amount	$ 10,606	$ 10,626
Finite other intangible assets, accumulated amortization	(5,912)	(5,762)
Finite other intangible assets, net	4,694	4,864
Other intangible assets, gross carrying amount	10,655	10,675
Other intangible assets, net	4,743	4,913
In process research and development [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite other intangible asset, carrying amount	49	49
Developed technology
Finite-Lived Intangible Assets [Line Items]
Finite other intangible assets, gross carrying amount	3,253	3,255
Finite other intangible assets, accumulated amortization	(1,996)	(1,934)
Finite other intangible assets, net	1,257	1,321
Software
Finite-Lived Intangible Assets [Line Items]
Finite other intangible assets, gross carrying amount	1,539	1,529
Finite other intangible assets, accumulated amortization	(900)	(876)
Finite other intangible assets, net	639	653
Trademarks/tradenames
Finite-Lived Intangible Assets [Line Items]
Finite other intangible assets, gross carrying amount	680	688
Finite other intangible assets, accumulated amortization	(638)	(631)
Finite other intangible assets, net	42	57
Customer-related
Finite-Lived Intangible Assets [Line Items]
Finite other intangible assets, gross carrying amount	4,898	4,911
Finite other intangible assets, accumulated amortization	(2,211)	(2,151)
Finite other intangible assets, net	2,687	2,760
Other
Finite-Lived Intangible Assets [Line Items]
Finite other intangible assets, gross carrying amount	236	243
Finite other intangible assets, accumulated amortization	(167)	(170)
Finite other intangible assets, net	$ 69	$ 73