CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income	$ 6,230,000,000	$ 6,828,000,000	$ 1,588,000,000
Less: Net income attributable to the noncontrolling interest	87,000,000	63,000,000	43,000,000
Net income attributable to Honeywell	6,143,000,000	6,765,000,000	1,545,000,000
Adjustments to reconcile net income attributable to Honeywell to net cash provided by operating activities [Abstract]
Depreciation	673,000,000	721,000,000	717,000,000
Amortization	415,000,000	395,000,000	398,000,000
{Gain) loss on sale of non-strategic businesses and assets	1,000,000	0	7,000,000
Repositioning and other charges	546,000,000	1,091,000,000	973,000,000
Net payments for repositioning and other charges	(376,000,000)	(652,000,000)	(628,000,000)
Pension and other postretirement income	(516,000,000)	(987,000,000)	(647,000,000)
Pension and other postretirement benefit payments	(78,000,000)	(80,000,000)	(106,000,000)
Stock compensation expense	153,000,000	175,000,000	176,000,000
Deferred income taxes	179,000,000	(586,000,000)	2,452,000,000
Other	(287,000,000)	(694,000,000)	1,642,000,000
Changes in assets and liabilities, net of the effects of acquisitions and divestitures: [Abstract]
Accounts receivable	11,000,000	(236,000,000)	(682,000,000)
Inventories	(100,000,000)	(503,000,000)	(259,000,000)
Other current assets	(430,000,000)	218,000,000	(568,000,000)
Accounts payable	118,000,000	733,000,000	924,000,000
Accrued liabilities	445,000,000	74,000,000	22,000,000
Net cash provided by (used for) operating activities	6,897,000,000	6,434,000,000	5,966,000,000
Cash flows from investing activities: [Abstract]
Expenditures for property, plant and equipment	(839,000,000)	(828,000,000)	(1,031,000,000)
Proceeds from disposals of property, plant and equipment	43,000,000	15,000,000	86,000,000
Increase in investments	(4,253,000,000)	(4,059,000,000)	(6,743,000,000)
Decrease in investments	4,464,000,000	6,032,000,000	4,414,000,000
Cash paid for acquisitions, net of cash acquired	(50,000,000)	(535,000,000)	(82,000,000)
Other	102,000,000	402,000,000	(218,000,000)
Net cash provided by (used for) investing activities	(533,000,000)	1,027,000,000	(3,574,000,000)
Cash flows from financing activities: [Abstract]
Proceeds from issuance of commercial paper and other short-term borrowings	14,199,000,000	23,891,000,000	13,701,000,000
Payments of commercial paper and other short-term borrowings	(14,199,000,000)	(24,095,000,000)	(13,532,000,000)
Proceeds from issuance of common stock	498,000,000	267,000,000	520,000,000
Proceeds from issuance of long-term debt	2,726,000,000	27,000,000	1,238,000,000
Payments of long-term debt	(2,903,000,000)	(1,330,000,000)	(292,000,000)
Repurchases of common stock	(4,400,000,000)	(4,000,000,000)	(2,889,000,000)
Cash dividends paid	(2,442,000,000)	(2,272,000,000)	(2,119,000,000)
Pre-separation funding	0	2,801,000,000	0
Spin-off cash	0	(179,000,000)	0
Other	(79,000,000)	(142,000,000)	(143,000,000)
Net cash provided by (used for) financing activities	(6,600,000,000)	(5,032,000,000)	(3,516,000,000)
Effect of foreign exchange rate changes on cash and cash equivalents	16,000,000	(201,000,000)	340,000,000
Net increase (decrease) in cash and cash equivalents	(220,000,000)	2,228,000,000	(784,000,000)
Cash and cash equivalents at beginning of period	9,287,000,000	7,059,000,000	7,843,000,000
Cash and cash equivalents at end of period	$ 9,067,000,000	$ 9,287,000,000	$ 7,059,000,000