PENSION AND OTHER POSTRETIREMENT BENEFITS (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2015
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Income) Loss [Abstract]
Total recognized in other comprehensive (income) loss	$ 1,707,000,000	$ (3,514,000,000)	$ 285,000,000
Other Postretirement Benefits for Significant Plans [Member]
Pension Benefits Paragraph Details Abstract
Explanation of significant changes in benefit obligations	Less than 1% of Honeywell’s U.S. employees are eligible for a retiree medical subsidy from the Company; and this subsidy is limited to a fixed-dollar amount. In addition, more than 75% of Honeywell’s current retirees either have no Company subsidy or have a fixed-dollar subsidy amount. This significantly limits our exposure to the impact of future health care cost increases.
Change in Benefit Obligation [Roll forward]
Benefit obligation at beginning of year	1,096,000,000	1,477,000,000
Service cost	0	0	1,000,000
Interest cost	42,000,000	44,000,000	53,000,000
Plan amendments	(87,000,000)	(175,000,000)
Actuarial (gains) losses	46,000,000	(108,000,000)
Benefits paid	(124,000,000)	(142,000,000)
Benefit obligation at end of year	973,000,000	1,096,000,000	1,477,000,000
Change In Plan Assets [Roll forward]
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Company contributions	0	0
Benefits paid	0	0
Fair value of plan assets at end of year	0	0	0
Funded status of plans	(973,000,000)	(1,096,000,000)
Amounts recognized in Consolidated Balance Sheet [Abstract]
Accrued pension liabilities - current	(111,000,000)	(130,000,000)
Postretirement benefit obligations other than pensions	(862,000,000)	(966,000,000)
Net amount recognized	(973,000,000)	(1,096,000,000)
Foreign plans excluded from postretirement benefits other than pensions	49,000,000	53,000,000
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Abstract]
Prior service cost (credit)	(235,000,000)	(168,000,000)
Net actuarial (gains) losses	278,000,000	256,000,000
Net amount recognized	43,000,000	88,000,000
Defined Benefit Plan Disclosure [Abstract]
Service cost	0	0	1,000,000
Interest cost	42,000,000	44,000,000	53,000,000
Amortization of prior service cost (credit)	(20,000,000)	(13,000,000)	(14,000,000)
Recognition of actuarial losses	24,000,000	27,000,000	34,000,000
Settlements and curtailments	0	(42,000,000)	(6,000,000)
Net periodic benefit (income) cost	46,000,000	16,000,000	68,000,000
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Income) Loss [Abstract]
Actuarial (gains) losses	46,000,000	(108,000,000)	34,000,000
Prior service cost (credit)	(87,000,000)	(175,000,000)	(1,000,000)
Prior service (cost) credit recognized during year	20,000,000	13,000,000	14,000,000
Actuarial losses recognized during year	(24,000,000)	(27,000,000)	(34,000,000)
Settlements and curtailments	0	42,000,000	6,000,000
Total recognized in other comprehensive (income) loss	(45,000,000)	(255,000,000)	19,000,000
Total recognized in net periodic benefit (income) cost and other comprehensive (income) loss	1,000,000	(239,000,000)	87,000,000
Other Postretirement Benefits for Significant Plans [Member] | Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Abstract]
Amortization of prior service cost (credit)				(30,000,000)
Recognition of actuarial losses				30,000,000
United States, Defined Benefit [Member]
Pension Benefits Paragraph Details Abstract
Explanation of significant changes in benefit obligations	All non-union hourly and salaried employees joining Honeywell for the first time after December 31, 2012, are not eligible to participate in Honeywell’s U.S. defined benefit pension plans. We also sponsor defined benefit pension plans which cover non-U.S. employees who are not U.S. citizens, in certain jurisdictions, principally the UK, Netherlands, Germany, and Canada.
Change in Benefit Obligation [Roll forward]
Benefit obligation at beginning of year	16,290,000,000	17,117,000,000
Service cost	241,000,000	272,000,000	256,000,000
Interest cost	771,000,000	677,000,000	738,000,000
Plan amendments	0	14,000,000
Actuarial (gains) losses	1,718,000,000	(975,000,000)
Divestitures	0	0
Acquisitions	0	190,000,000
Benefits paid	(996,000,000)	(1,005,000,000)
Foreign currency and other	11,000,000	0
Benefit obligation at end of year	18,035,000,000	16,290,000,000	17,117,000,000
Change In Plan Assets [Roll forward]
Fair value of plan assets at beginning of year	16,727,000,000	14,345,000,000
Actual return on plan assets	1,290,000,000	3,191,000,000
Company contributions	36,000,000	28,000,000
Acquisitions	0	168,000,000
Benefits paid	(996,000,000)	(1,005,000,000)
Foreign currency and other	9,000,000	0
Fair value of plan assets at end of year	17,066,000,000	16,727,000,000	14,345,000,000
Funded status of plans	(969,000,000)	437,000,000
Amounts recognized in Consolidated Balance Sheet [Abstract]
Prepaid pension benefit cost	0	839,000,000
Accrued pension liabilities - current	(74,000,000)	(36,000,000)
Accrued pension liabilities - noncurrent	(895,000,000)	(366,000,000)
Net amount recognized	(969,000,000)	437,000,000
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Abstract]
Transition obligation	0	0
Prior service cost (credit)	88,000,000	111,000,000
Net actuarial (gains) losses	281,000,000	(1,378,000,000)
Net amount recognized	369,000,000	(1,267,000,000)
Defined Benefit Plan Disclosure [Abstract]
Service cost	241,000,000	272,000,000	256,000,000
Interest cost	771,000,000	677,000,000	738,000,000
Expected return on plan assets	(1,257,000,000)	(1,076,000,000)	(1,020,000,000)
Amortization of transition obligations	0	0	0
Amortization of prior service cost (credit)	23,000,000	23,000,000	28,000,000
Recognition of actuarial losses	26,000,000	0	707,000,000
Settlements and curtailments	0	0	0
Net periodic benefit (income) cost	(196,000,000)	(104,000,000)	709,000,000
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Income) Loss [Abstract]
Actuarial (gains) losses	1,686,000,000	(3,090,000,000)	859,000,000
Prior service cost (credit)	0	14,000,000	0
Transition obligation recognized during year	0	0	0
Prior service (cost) credit recognized during year	(23,000,000)	(23,000,000)	(28,000,000)
Actuarial losses recognized during year	(26,000,000)	0	(707,000,000)
Foreign exchange translation adjustments	0	0	0
Total recognized in other comprehensive (income) loss	1,637,000,000	(3,099,000,000)	124,000,000
Total recognized in net periodic benefit (income) cost and other comprehensive (income) loss	1,441,000,000	(3,203,000,000)	833,000,000
United States, Defined Benefit [Member] | Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Abstract]
Amortization of prior service cost (credit)				23,000,000
Non-U.S. Pension Plans, Defined Benefit [Member]
Change in Benefit Obligation [Roll forward]
Benefit obligation at beginning of year	5,523,000,000	5,272,000,000
Service cost	56,000,000	58,000,000	48,000,000
Interest cost	231,000,000	215,000,000	221,000,000
Plan amendments	(17,000,000)	0
Actuarial (gains) losses	601,000,000	72,000,000
Divestitures	(61,000,000)	0
Acquisitions	0	44,000,000
Benefits paid	(210,000,000)	(198,000,000)
Foreign currency and other	(362,000,000)	60,000,000
Benefit obligation at end of year	5,761,000,000	5,523,000,000	5,272,000,000
Change In Plan Assets [Roll forward]
Fair value of plan assets at beginning of year	5,037,000,000	4,527,000,000
Actual return on plan assets	622,000,000	428,000,000
Company contributions	187,000,000	183,000,000
Acquisitions	0	45,000,000
Benefits paid	(210,000,000)	(198,000,000)
Foreign currency and other	(303,000,000)	52,000,000
Fair value of plan assets at end of year	5,333,000,000	5,037,000,000	4,527,000,000
Funded status of plans	(428,000,000)	(486,000,000)
Amounts recognized in Consolidated Balance Sheet [Abstract]
Prepaid pension benefit cost	270,000,000	120,000,000
Accrued pension liabilities - current	(8,000,000)	(13,000,000)
Accrued pension liabilities - noncurrent	(690,000,000)	(593,000,000)
Net amount recognized	(428,000,000)	(486,000,000)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Abstract]
Transition obligation	1,000,000	3,000,000
Prior service cost (credit)	(27,000,000)	(14,000,000)
Net actuarial (gains) losses	493,000,000	434,000,000
Net amount recognized	467,000,000	423,000,000
Defined Benefit Plan Disclosure [Abstract]
Service cost	56,000,000	58,000,000	48,000,000
Interest cost	231,000,000	215,000,000	221,000,000
Expected return on plan assets	(354,000,000)	(308,000,000)	(291,000,000)
Amortization of transition obligations	2,000,000	2,000,000	2,000,000
Amortization of prior service cost (credit)	(2,000,000)	(2,000,000)	(2,000,000)
Recognition of actuarial losses	223,000,000	51,000,000	250,000,000
Settlements and curtailments	0	0	2,000,000
Net periodic benefit (income) cost	156,000,000	16,000,000	230,000,000
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Income) Loss [Abstract]
Actuarial (gains) losses	333,000,000	(48,000,000)	327,000,000
Prior service cost (credit)	(17,000,000)	0	0
Transition obligation recognized during year	(2,000,000)	(2,000,000)	(2,000,000)
Prior service (cost) credit recognized during year	2,000,000	2,000,000	2,000,000
Actuarial losses recognized during year	(223,000,000)	(51,000,000)	(250,000,000)
Foreign exchange translation adjustments	(50,000,000)	3,000,000	23,000,000
Total recognized in other comprehensive (income) loss	43,000,000	(96,000,000)	100,000,000
Total recognized in net periodic benefit (income) cost and other comprehensive (income) loss	199,000,000	(80,000,000)	330,000,000
Non-U.S. Pension Plans, Defined Benefit [Member] | Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Abstract]
Amortization of prior service cost (credit)				$ (3,000,000)