CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 4,865,000,000	$ 6,230,000,000	$ 6,828,000,000
Other Comprehensive Income (Loss), Net Of Tax [Abstract]
Foreign exchange translation adjustment	(211,000,000)	143,000,000	(685,000,000)
Actuarial gains (losses) recognized	91,000,000	162,000,000	(602,000,000)
Prior service credit (cost) recognized	47,000,000	1,000,000	2,000,000
Prior service credit recognized during year	(82,000,000)	(79,000,000)	(74,000,000)
Actuarial (gains) losses recognized during year	41,000,000	16,000,000	35,000,000
Settlements and curtailments	0	0	2,000,000
Foreign exchange translation and other	(23,000,000)	(14,000,000)	31,000,000
Pensions and other postretirement benefit adjustments	74,000,000	86,000,000	(606,000,000)
Changes in fair value of available for sale investments	4,000,000	0	0
Cash flow hedges recognized in other comprehensive income	10,000,000	103,000,000	89,000,000
Less: Reclassification adjustment for gains (losses) included in net income	54,000,000	92,000,000	4,000,000
Changes in fair value of cash flow hedges	(44,000,000)	11,000,000	85,000,000
Other comprehensive income (loss), net of tax	(177,000,000)	240,000,000	(1,206,000,000)
Comprehensive income	4,688,000,000	6,470,000,000	5,622,000,000
Less: Comprehensive income attributable to the noncontrolling interest	89,000,000	82,000,000	53,000,000
Comprehensive income attributable to Honeywell	$ 4,599,000,000	$ 6,388,000,000	$ 5,569,000,000