CONSOLIDATED STATEMENT OF SHAREOWNERS EQUITY - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]
Balance at beginning of period at Dec. 31, 2018			$ 6,452,000,000	$ (19,771,000,000)	$ 33,978,000,000	$ (3,437,000,000)	$ 178,000,000
Issued for employee savings and option plans			242,000,000	$ 286,000,000
Stock Issued During Period Shares For Employee Savings And Option Plans				7,000,000.0
Stock-based compensation expense			112,000,000
Treasury Stock, Shares beginning balance at Dec. 31, 2018				(228,000,000.0)
Reacquired stock or repurchases of common stock				$ (3,650,000,000)
Reacquired stock or repurchases of common stock, shares				(22,100,000)
Treasury Stock, Shares ending balance at Sep. 30, 2019				(243,100,000)
Net income attributable to Honeywell	$ 4,581,000,000				4,581,000,000
Acquisitions, divestitures, and other							1,000,000
Dividends on common stock					(1,784,000,000)
Foreign exchange translation adjustment	177,000,000					177,000,000	(3,000,000)
Pension and other postretirement benefit adjustments	(59,000,000)					(59,000,000)
Changes in fair value of effective cash flow hedges	24,000,000					24,000,000
Net Income attributable to noncontrolling interest	$ 59,000,000						59,000,000
Dividends Paid							(38,000,000)
Cash dividends per share of common stock	$ 2.460
Balance at end of period at Sep. 30, 2019	$ 18,306,000,000	$ 958,000,000	6,806,000,000	$ (23,135,000,000)	36,775,000,000	(3,295,000,000)	197,000,000
Common Stock, Shares, Issued, Ending Balance at Sep. 30, 2019	957,600,000	957,600,000
Balance at beginning of period at Jun. 30, 2019			6,780,000,000	(22,156,000,000)	35,741,000,000	(3,453,000,000)	190,000,000
Issued for employee savings and option plans			(11,000,000)	$ 21,000,000
Stock Issued During Period Shares For Employee Savings And Option Plans				900,000
Stock-based compensation expense			37,000,000
Treasury Stock, Shares beginning balance at Jun. 30, 2019				(238,100,000)
Reacquired stock or repurchases of common stock				$ (1,000,000,000)
Reacquired stock or repurchases of common stock, shares				(5,900,000)
Treasury Stock, Shares ending balance at Sep. 30, 2019				(243,100,000)
Net income attributable to Honeywell	$ 1,624,000,000				1,624,000,000
Acquisitions, divestitures, and other							1,000,000
Dividends on common stock					(590,000,000)
Foreign exchange translation adjustment	163,000,000					163,000,000	(5,000,000)
Pension and other postretirement benefit adjustments	(20,000,000)					(20,000,000)
Changes in fair value of effective cash flow hedges	15,000,000					15,000,000
Net Income attributable to noncontrolling interest	$ 24,000,000						24,000,000
Dividends Paid							(13,000,000)
Cash dividends per share of common stock	$ 0.820
Balance at end of period at Sep. 30, 2019	$ 18,306,000,000	$ 958,000,000	6,806,000,000	$ (23,135,000,000)	36,775,000,000	(3,295,000,000)	197,000,000
Common Stock, Shares, Issued, Ending Balance at Sep. 30, 2019	957,600,000	957,600,000
Shares outstanding	714,500,000
Balance at beginning of period at Dec. 31, 2019	$ 18,706,000,000		6,876,000,000	(23,836,000,000)	37,693,000,000	(3,197,000,000)	212,000,000
Issued for employee savings and option plans			161,000,000	$ 179,000,000
Stock Issued During Period Shares For Employee Savings And Option Plans				3,700,000
Stock-based compensation expense			118,000,000
Treasury Stock, Shares beginning balance at Dec. 31, 2019				(246,500,000)
Reacquired stock or repurchases of common stock				$ (2,149,000,000)
Reacquired stock or repurchases of common stock, shares				(13,100,000)
Treasury Stock, Shares ending balance at Sep. 30, 2020				(255,900,000)
Net income attributable to Honeywell	3,420,000,000				3,420,000,000
Acquisitions, divestitures, and other							(6,000,000)
Dividends on common stock					(1,910,000,000)
Foreign exchange translation adjustment	(237,000,000)					(237,000,000)	2,000,000
Pension and other postretirement benefit adjustments	(60,000,000)					(60,000,000)
Changes in fair value of effective cash flow hedges	58,000,000					58,000,000
Net Income attributable to noncontrolling interest	$ 66,000,000						66,000,000
Dividends Paid							(35,000,000)
Cash dividends per share of common stock	$ 2.700
Balance at end of period at Sep. 30, 2020	$ 18,313,000,000	$ 958,000,000	7,155,000,000	$ (25,806,000,000)	39,203,000,000	(3,436,000,000)	239,000,000
Common Stock, Shares, Issued, Ending Balance at Sep. 30, 2020	957,600,000	957,600,000
Balance at beginning of period at Jun. 30, 2020			7,104,000,000	(25,685,000,000)	39,080,000,000	(3,310,000,000)	219,000,000
Issued for employee savings and option plans			11,000,000	$ 43,000,000
Stock Issued During Period Shares For Employee Savings And Option Plans				900,000
Stock-based compensation expense			40,000,000
Treasury Stock, Shares beginning balance at Jun. 30, 2020				(255,800,000)
Reacquired stock or repurchases of common stock				$ (164,000,000)
Reacquired stock or repurchases of common stock, shares				(1,000,000.0)
Treasury Stock, Shares ending balance at Sep. 30, 2020				(255,900,000)
Net income attributable to Honeywell	$ 758,000,000				758,000,000
Acquisitions, divestitures, and other							0
Dividends on common stock					(635,000,000)
Foreign exchange translation adjustment	(82,000,000)					(82,000,000)	6,000,000
Pension and other postretirement benefit adjustments	(20,000,000)					(20,000,000)
Changes in fair value of effective cash flow hedges	(24,000,000)					(24,000,000)
Net Income attributable to noncontrolling interest	$ 23,000,000						23,000,000
Dividends Paid							(9,000,000)
Cash dividends per share of common stock	$ 0.900
Balance at end of period at Sep. 30, 2020	$ 18,313,000,000	$ 958,000,000	$ 7,155,000,000	$ (25,806,000,000)	$ 39,203,000,000	$ (3,436,000,000)	$ 239,000,000
Common Stock, Shares, Issued, Ending Balance at Sep. 30, 2020	957,600,000	957,600,000
Shares outstanding	701,700,000