Document and Entity Information (USD $) In Billions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Jan. 25, 2013	Jun. 30, 2012
Document And Entity Information [Abstract]
Document type	10-K
Document period end date	Dec. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Amendment flag	false
Entity registrant name	Honeywell International Inc
Entity central index key	0000773840
Entity current reporting status	Yes
Entity voluntary filers	No
Current fiscal year end date	--12-31
Entity filer category	Large Accelerated Filer
Entity well known seasoned issuer	Yes
Entity common stock shares outstanding		783,787,893
Entity public float			$ 43.6