EARNINGS (LOSS) PER SHARE (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Earnings Per Share, Basic [Abstract]
Income from continuing operations less net income attributable to the noncontrolling interest	$ 823	$ 687
Income from discontinued operations	0	18
Net income attributable to Honeywell	823	705
Weighted average shares outstanding	777.3	785.5
Earnings per share continuing operations - basic:	$ 1.06	$ 0.87
Earnings per share discontinued operations - basic:	$ 0.00	$ 0.03
Earnings per share: Basic	$ 1.06	$ 0.90
Assuming dilution
Income from continuing operations less net income attributable to the noncontrolling interest	823	687
Income from discontinued operations	0	18
Net income attributable to Honeywell	$ 823	$ 705
Average shares
Weighted average shares outstanding	777.3	785.5
Dilutive securities issuable - stock plans	10.8	12.2
Total weighted average diluted shares outstanding	788.1	797.7
Earnings per share continuing operations - assuming dilution:	$ 1.04	$ 0.86
Earnings per share discontinued operations - assuming dilution:	$ 0.00	$ 0.02
Earnings per share - Assuming dilution	$ 1.04	$ 0.88
Stock options excluded from diluted computations	9.6	7.1