REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS 2 (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($)
Disaggregation Of Revenue [Line Items]
Revenue	$ 10,392
Disaggregation of revenue, timing of recognition - percentage	100.00%
Products [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	79.00%
Products [Member] | Transferred At Point In Time [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	69.00%
Products [Member] | Transferred Over Time [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	10.00%
Services [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	21.00%
Services [Member] | Transferred At Point In Time [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	7.00%
Services [Member] | Transferred Over Time [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	14.00%
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 3,977
Aerospace [Member] | Commercial Original Equipment [Member]
Disaggregation Of Revenue [Line Items]
Revenue	695
Aerospace [Member] | Commercial Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Revenue	1,268
Aerospace [Member] | Defense Services [Member]
Disaggregation Of Revenue [Line Items]
Revenue	1,086
Aerospace [Member] | Transportation Systems [Member]
Disaggregation Of Revenue [Line Items]
Revenue	928
Home And Building Technologies [Member]
Disaggregation Of Revenue [Line Items]
Revenue	2,433
Home And Building Technologies [Member] | Products And Software [Member]
Disaggregation Of Revenue [Line Items]
Revenue	519
Home And Building Technologies [Member] | Distribution (ADI)
Disaggregation Of Revenue [Line Items]
Revenue	638
Home And Building Technologies [Member] | Building Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	562
Home And Building Technologies [Member] | Building Products [Member]
Disaggregation Of Revenue [Line Items]
Revenue	505
Performance Materials And Technologies [Member]
Disaggregation Of Revenue [Line Items]
Revenue	2,534
Performance Materials And Technologies [Member] | UOP [Member]
Disaggregation Of Revenue [Line Items]
Revenue	612
Performance Materials And Technologies [Member] | Process Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	894
Performance Materials And Technologies [Member] | Smart Energy [Member]
Disaggregation Of Revenue [Line Items]
Revenue	320
Performance Materials And Technologies [Member] | Specialty Products [Member]
Disaggregation Of Revenue [Line Items]
Revenue	277
Performance Materials And Technologies [Member] | Fluorine Products [Member]
Disaggregation Of Revenue [Line Items]
Revenue	431
Safety And Productivity Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	1,448
Safety And Productivity Solutions [Member] | Safety and Retail [Member]
Disaggregation Of Revenue [Line Items]
Revenue	551
Safety And Productivity Solutions [Member] | Productivity Products [Member]
Disaggregation Of Revenue [Line Items]
Revenue	329
Safety And Productivity Solutions [Member] | Warehouse and Workflow Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	367
Safety And Productivity Solutions [Member] | Sensing & Internet-of-Things (IoT)
Disaggregation Of Revenue [Line Items]
Revenue	$ 201