EARNINGS (LOSS) PER SHARE (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Net income attributable to Honeywell	$ 1,116us-gaap_NetIncomeLoss	$ 1,017us-gaap_NetIncomeLoss
Weighted average shares outstanding	783.8	784.9
Earnings per share of common stock - basic	$ 1.42us-gaap_EarningsPerShareBasic	$ 1.3us-gaap_EarningsPerShareBasic
Assuming dilution
Net income attributable to Honeywell	$ 1,116us-gaap_NetIncomeLoss	$ 1,017us-gaap_NetIncomeLoss
Average shares
Weighted average shares outstanding	783.8	784.9
Dilutive securities issuable - stock plans	10.2	11.5
Total weighted average diluted shares outstanding	794.0	796.4
Earnings per share of common stock - assuming dilution	$ 1.41us-gaap_EarningsPerShareDiluted	$ 1.28us-gaap_EarningsPerShareDiluted
Earnings Per Share Paragraph Details [Abstract]
Stock options excluded from diluted computations	7.8	2.0

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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