CONSOLIDATED STATEMENT OF SHAREOWNERS EQUITY - USD ($)	Total	Common Stock [Member]	Additional paid-in capital [Member]	Treasury stock [Member]	Retained earnings [Member]	Accumulated other comprehensive income (loss) [Member]	Noncontrolling interest [Member]
Balance at beginning of period at Dec. 31, 2019			$ 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			150,000,000	$ 136,000,000
Stock Issued During Period Shares For Employee Savings And Option Plans				2,800,000
Stock-based compensation expense			78,000,000
Treasury Stock, Shares beginning balance at Dec. 31, 2019				(246,500,000)
Reacquired stock or repurchases of common stock				$ (1,985,000,000)
Reacquired stock or repurchases of common stock, shares				(12,100,000)
Treasury Stock, Shares ending balance at Jun. 30, 2020				(255,800,000)
Net income attributable to Honeywell	$ 2,662,000,000				2,662,000,000
Acquisitions, divestitures, and other							(6,000,000)
Dividends on common stock					(1,275,000,000)
Foreign exchange translation adjustment	(155,000,000)					(155,000,000)	(4,000,000)
Pension and other postretirement benefit adjustments	(40,000,000)					(40,000,000)
Changes in fair value of available for sale investments						0
Changes in fair value of cash flow hedges	82,000,000					82,000,000
Net Income attributable to noncontrolling interest	$ 43,000,000						43,000,000
Dividends Paid							(26,000,000)
Contributions from noncontrolling interest holders							0
Cash dividends per share of common stock	$ 1.800
Balance at end of period at Jun. 30, 2020	$ 18,366,000,000	$ 958,000,000	7,104,000,000	$ (25,685,000,000)	39,080,000,000	(3,310,000,000)	219,000,000
Common Stock, Shares, Issued, Ending Balance at Jun. 30, 2020	957,600,000	957,600,000
Balance at beginning of period at Mar. 31, 2020			7,047,000,000	(25,643,000,000)	38,635,000,000	(3,353,000,000)	221,000,000
Issued for employee savings and option plans			23,000,000	$ 20,000,000
Stock Issued During Period Shares For Employee Savings And Option Plans				400,000
Stock-based compensation expense			34,000,000
Treasury Stock, Shares beginning balance at Mar. 31, 2020				(255,800,000)
Reacquired stock or repurchases of common stock				$ (62,000,000)
Reacquired stock or repurchases of common stock, shares				(400,000)
Treasury Stock, Shares ending balance at Jun. 30, 2020				(255,800,000)
Net income attributable to Honeywell	$ 1,081,000,000				1,081,000,000
Acquisitions, divestitures, and other							0
Dividends on common stock					(636,000,000)
Foreign exchange translation adjustment	121,000,000					121,000,000	3,000,000
Pension and other postretirement benefit adjustments	(20,000,000)					(20,000,000)
Changes in fair value of available for sale investments						0
Changes in fair value of cash flow hedges	(58,000,000)					(58,000,000)
Net Income attributable to noncontrolling interest	$ 18,000,000						18,000,000
Dividends Paid							(23,000,000)
Contributions from noncontrolling interest holders							0
Cash dividends per share of common stock	$ 0.900
Balance at end of period at Jun. 30, 2020	$ 18,366,000,000	$ 958,000,000	7,104,000,000	$ (25,685,000,000)	39,080,000,000	(3,310,000,000)	219,000,000
Common Stock, Shares, Issued, Ending Balance at Jun. 30, 2020	957,600,000	957,600,000
Shares outstanding	701,800,000
Balance at beginning of period at Dec. 31, 2020	$ 17,790,000,000		7,292,000,000	(27,229,000,000)	39,905,000,000	(3,377,000,000)	241,000,000
Issued for employee savings and option plans			158,000,000	$ 100,000,000
Stock Issued During Period Shares For Employee Savings And Option Plans				2,200,000
Stock-based compensation expense			116,000,000
Treasury Stock, Shares beginning balance at Dec. 31, 2020				(260,800,000)
Reacquired stock or repurchases of common stock				$ (1,849,000,000)
Reacquired stock or repurchases of common stock, shares				(8,600,000)
Treasury Stock, Shares ending balance at Jun. 30, 2021				(267,200,000)
Net income attributable to Honeywell	2,857,000,000				2,857,000,000
Acquisitions, divestitures, and other							5,000,000
Dividends on common stock					(1,295,000,000)
Foreign exchange translation adjustment	343,000,000					342,000,000	1,000,000
Pension and other postretirement benefit adjustments	(43,000,000)					(43,000,000)
Changes in fair value of available for sale investments						3,000,000
Changes in fair value of cash flow hedges	6,000,000					6,000,000
Net Income attributable to noncontrolling interest	$ 38,000,000						38,000,000
Dividends Paid							(25,000,000)
Contributions from noncontrolling interest holders							4,000,000
Cash dividends per share of common stock	$ 1.860
Balance at end of period at Jun. 30, 2021	$ 18,202,000,000	$ 958,000,000	7,566,000,000	$ (28,978,000,000)	41,467,000,000	(3,075,000,000)	264,000,000
Common Stock, Shares, Issued, Ending Balance at Jun. 30, 2021	957,600,000	957,600,000
Balance at beginning of period at Mar. 31, 2021			7,505,000,000	(27,975,000,000)	40,682,000,000	(3,184,000,000)	266,000,000
Issued for employee savings and option plans			22,000,000	$ 24,000,000
Stock Issued During Period Shares For Employee Savings And Option Plans				400,000
Stock-based compensation expense			39,000,000
Treasury Stock, Shares beginning balance at Mar. 31, 2021				(263,000,000.0)
Reacquired stock or repurchases of common stock				$ (1,027,000,000)
Reacquired stock or repurchases of common stock, shares				(4,600,000)
Treasury Stock, Shares ending balance at Jun. 30, 2021				(267,200,000)
Net income attributable to Honeywell	$ 1,430,000,000				1,430,000,000
Acquisitions, divestitures, and other							5,000,000
Dividends on common stock					(645,000,000)
Foreign exchange translation adjustment	129,000,000					129,000,000	0
Pension and other postretirement benefit adjustments	(21,000,000)					(21,000,000)
Changes in fair value of available for sale investments						0
Changes in fair value of cash flow hedges	1,000,000					1,000,000
Net Income attributable to noncontrolling interest	$ 17,000,000						17,000,000
Dividends Paid							(24,000,000)
Contributions from noncontrolling interest holders							0
Cash dividends per share of common stock	$ 0.930
Balance at end of period at Jun. 30, 2021	$ 18,202,000,000	$ 958,000,000	$ 7,566,000,000	$ (28,978,000,000)	$ 41,467,000,000	$ (3,075,000,000)	$ 264,000,000
Common Stock, Shares, Issued, Ending Balance at Jun. 30, 2021	957,600,000	957,600,000
Shares outstanding	690,400,000