REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS 2 (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Revenue	$ 10,919	$ 21,311
Disaggregation of revenue, timing of recognition - percentage	100.00%	100.00%
Products [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	80.00%	80.00%
Products [Member] | Transferred At Point In Time [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	69.00%	69.00%
Products [Member] | Transferred Over Time [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	11.00%	11.00%
Services [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	20.00%	20.00%
Services [Member] | Transferred At Point In Time [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	6.00%	6.00%
Services [Member] | Transferred Over Time [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	14.00%	14.00%
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 4,058	$ 8,035
Aerospace [Member] | Commercial Aviation Original Equipment [Member]
Disaggregation Of Revenue [Line Items]
Revenue	712	1,407
Aerospace [Member] | Commercial Aviation Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Revenue	1,326	2,594
Aerospace [Member] | Defense Services [Member]
Disaggregation Of Revenue [Line Items]
Revenue	1,128	2,214
Aerospace [Member] | Transportation Systems [Member]
Disaggregation Of Revenue [Line Items]
Revenue	892	1,820
Home And Building Technologies [Member]
Disaggregation Of Revenue [Line Items]
Revenue	2,546	4,979
Home And Building Technologies [Member] | Products And Software [Member]
Disaggregation Of Revenue [Line Items]
Revenue	514	1,033
Home And Building Technologies [Member] | Distribution (ADI)
Disaggregation Of Revenue [Line Items]
Revenue	676	1,314
Home And Building Technologies [Member] | Connected Buildings [Member]
Disaggregation Of Revenue [Line Items]
Revenue	222	431
Home And Building Technologies [Member] | Building Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	602	1,164
Home And Building Technologies [Member] | Building Products [Member]
Disaggregation Of Revenue [Line Items]
Revenue	532	1,037
Performance Materials And Technologies [Member]
Disaggregation Of Revenue [Line Items]
Revenue	2,698	5,232
Performance Materials And Technologies [Member] | UOP [Member]
Disaggregation Of Revenue [Line Items]
Revenue	678	1,290
Performance Materials And Technologies [Member] | Process Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	957	1,851
Performance Materials And Technologies [Member] | Smart Energy [Member]
Disaggregation Of Revenue [Line Items]
Revenue	316	636
Performance Materials And Technologies [Member] | Specialty Products [Member]
Disaggregation Of Revenue [Line Items]
Revenue	291	568
Performance Materials And Technologies [Member] | Fluorine Products [Member]
Disaggregation Of Revenue [Line Items]
Revenue	456	887
Safety And Productivity Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	1,617	3,065
Safety And Productivity Solutions [Member] | Safety and Retail [Member]
Disaggregation Of Revenue [Line Items]
Revenue	565	1,116
Safety And Productivity Solutions [Member] | Productivity Products [Member]
Disaggregation Of Revenue [Line Items]
Revenue	359	688
Safety And Productivity Solutions [Member] | Warehouse and Workflow Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	469	836
Safety And Productivity Solutions [Member] | Sensing & Internet-of-Things (IoT)
Disaggregation Of Revenue [Line Items]
Revenue	$ 224	$ 425