COMMITMENTS AND CONTINGENCIES 8 (Details) - United Auto Workers [Member] $ in Millions	9 Months Ended
Sep. 30, 2017 USD ($)
Pre-2003 Retirees [Member]
Other Matters Paragraph Details [Line Items]
Potential Opeb Increase Due To Adverse Ruling	$ 129
Post-2003 Retirees [Member]
Other Matters Paragraph Details [Line Items]
Potential Opeb Increase Due To Adverse Ruling	$ 95

The potential increase to Honeywell's OPEB in the event of an adverse ruling.

No definition available.

Name:	hon_PotentialOpebIncreaseDueToAdverseRuling
Namespace Prefix:	hon_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration