REPOSITIONING AND OTHER CHARGES 3 (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Pretax Impact Of Total Net Repositioning And Other Charges By Segment [Line Items]
Total net repositioning charges	$ 144	$ 96	$ 486	$ 306
Corporate
Pretax Impact Of Total Net Repositioning And Other Charges By Segment [Line Items]
Total net repositioning charges	33	22	77	123
Aerospace
Pretax Impact Of Total Net Repositioning And Other Charges By Segment [Line Items]
Total net repositioning charges	33	12	151	32
Honeywell Building Technologies
Pretax Impact Of Total Net Repositioning And Other Charges By Segment [Line Items]
Total net repositioning charges	29	28	87	36
Performance Materials and Technologies
Pretax Impact Of Total Net Repositioning And Other Charges By Segment [Line Items]
Total net repositioning charges	34	28	139	61
Safety and Productivity Solutions
Pretax Impact Of Total Net Repositioning And Other Charges By Segment [Line Items]
Total net repositioning charges	$ 15	$ 6	$ 32	$ 54