GOODWILL AND OTHER INTANGIBLE ASSETS - Other Intangible Assets by Major Class (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Summary of other intangible assets
Intangible assets not subject to amortization	$ 1,374	$ 1,382
Intangible assets subject to amortization
Historical cost	7,747	5,904
Accumulated amortization	3,266	3,111
Customer relationships
Intangible assets subject to amortization
Historical cost	4,752	3,415
Accumulated amortization	1,974	1,795
Patents and technology
Intangible assets subject to amortization
Historical cost	1,879	1,428
Accumulated amortization	712	773
Trademarks
Intangible assets subject to amortization
Historical cost	951	970
Accumulated amortization	518	505
Other
Intangible assets subject to amortization
Historical cost	165	91
Accumulated amortization	$ 62	$ 38