REPOSITIONING AND OTHER CHARGES 3 (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Pretax Impact Of Total Net Repositioning And Other Charges By Segment [Line Items]
Total net repositioning charges	$ 141	$ 62
Corporate
Pretax Impact Of Total Net Repositioning And Other Charges By Segment [Line Items]
Total net repositioning charges	46	(1)
Aerospace
Pretax Impact Of Total Net Repositioning And Other Charges By Segment [Line Items]
Total net repositioning charges	48	11
Honeywell Building Technologies
Pretax Impact Of Total Net Repositioning And Other Charges By Segment [Line Items]
Total net repositioning charges	5	25
Performance Materials and Technologies
Pretax Impact Of Total Net Repositioning And Other Charges By Segment [Line Items]
Total net repositioning charges	5	21
Safety and Productivity Solutions
Pretax Impact Of Total Net Repositioning And Other Charges By Segment [Line Items]
Total net repositioning charges	$ 37	$ 6