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, 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			127,000,000	$ 116,000,000
Stock Issued During Period Shares For Employee Savings And Option Plans				2,400,000
Stock-based compensation expense			44,000,000
Treasury Stock, Shares beginning balance at Dec. 31, 2019				(246,500,000)
Reacquired stock or repurchases of common stock				$ (1,923,000,000)
Reacquired stock or repurchases of common stock, shares				(11,700,000)
Treasury Stock, Shares ending balance at Mar. 31, 2020				(255,800,000)
Net income attributable to Honeywell	$ 1,581,000,000				1,581,000,000
Acquisitions, divestitures, and other							(6,000,000)
Dividends on common stock					(639,000,000)
Foreign exchange translation adjustment	(276,000,000)					(276,000,000)	(7,000,000)
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 effective cash flow hedges	140,000,000					140,000,000
Net Income attributable to noncontrolling interest	$ 25,000,000						25,000,000
Dividends Paid							(3,000,000)
Contributions from noncontrolling interest holders							0
Cash dividends per share of common stock	$ 0.900
Balance at end of period at Mar. 31, 2020	$ 17,865,000,000	$ 958,000,000	7,047,000,000	$ (25,643,000,000)	38,635,000,000	(3,353,000,000)	221,000,000
Common Stock, Shares, Issued, Ending Balance at Mar. 31, 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			136,000,000	$ 76,000,000
Stock Issued During Period Shares For Employee Savings And Option Plans				1,800,000
Stock-based compensation expense			77,000,000
Treasury Stock, Shares beginning balance at Dec. 31, 2020				(260,800,000)
Reacquired stock or repurchases of common stock				$ (822,000,000)
Reacquired stock or repurchases of common stock, shares				(4,000,000.0)
Treasury Stock, Shares ending balance at Mar. 31, 2021				(263,000,000.0)
Net income attributable to Honeywell	1,427,000,000				1,427,000,000
Acquisitions, divestitures, and other							0
Dividends on common stock					(650,000,000)
Foreign exchange translation adjustment	214,000,000					213,000,000	1,000,000
Pension and other postretirement benefit adjustments	(22,000,000)					(22,000,000)
Changes in fair value of available for sale investments						(3,000,000)
Changes in fair value of effective cash flow hedges	5,000,000					5,000,000
Net Income attributable to noncontrolling interest	$ 21,000,000						21,000,000
Dividends Paid							(1,000,000)
Contributions from noncontrolling interest holders							4,000,000
Cash dividends per share of common stock	$ 0.930
Balance at end of period at Mar. 31, 2021	$ 18,252,000,000	$ 958,000,000	$ 7,505,000,000	$ (27,975,000,000)	$ 40,682,000,000	$ (3,184,000,000)	$ 266,000,000
Common Stock, Shares, Issued, Ending Balance at Mar. 31, 2021	957,600,000	957,600,000
Shares outstanding	694,600,000