SEGMENT FINANCIAL DATA (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Product sales	$ 8,703	$ 8,079	$ 16,937	$ 15,619
Service sales	2,216	1,999	4,374	3,951
Net sales	10,919	10,078	21,311	19,570
Total segment profit	2,145	1,910	4,140	3,699
Corporate Non Segment [Member]
Segment Reporting Information [Line Items]
Total segment profit	(64)	(67)	(128)	(128)
Aerospace [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Product sales	2,800	2,545	5,528	4,941
Service sales	1,258	1,129	2,507	2,279
Net sales	4,058	3,674	8,035	7,220
Total segment profit	918	819	1,811	1,615
Performance Materials And Technologies [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Product sales	2,194	2,101	4,257	4,041
Service sales	504	460	975	873
Net sales	2,698	2,561	5,232	4,914
Total segment profit	597	553	1,116	1,036
Home And Building Technologies [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Product sales	2,183	2,078	4,266	4,029
Service sales	363	336	713	654
Net sales	2,546	2,414	4,979	4,683
Total segment profit	427	391	843	768
Safety And Productivity Solutions [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Product sales	1,526	1,355	2,886	2,608
Service sales	91	74	179	145
Net sales	1,617	1,429	3,065	2,753
Total segment profit	$ 267	$ 214	$ 498	$ 408