Document and Entity Information (USD $)
In Billions, except Share data
9 Months Ended
Sep. 30, 2011
Jun. 30, 2011
Document And Entity Information [Abstract]  
Document type10-Q 
Document period end dateSep. 30, 2011
Document Fiscal Year Focus2011 
Document Fiscal Period FocusQ3 
Amendment flagfalse 
Entity registrant nameHoneywell International Inc 
Entity central index key0000773840 
Entity current reporting statusYes 
Entity voluntary filersNo 
Current fiscal year end date--12-31 
Entity filer categoryLarge Accelerated Filer 
Entity well known seasoned issuerYes 
Entity common stock shares outstanding773,497,365 
Entity public float $ 47.1