CONSOLIDATED STATEMENT OF SHAREOWNERS' EQUITY (Unaudited) - USD ($) shares in Millions	Total	Common stock, par value	Additional paid-in capital	Treasury stock	Retained earnings	Accumulated other comprehensive loss	Noncontrolling interest
Beginning balance at Dec. 31, 2023			$ 9,062,000,000	$ (38,008,000,000)	$ 47,979,000,000	$ (4,135,000,000)	$ 578,000,000
Treasury stock, beginning balance (in shares) at Dec. 31, 2023				(305.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reacquired stock or repurchases of common stock (in shares)				(3.4)
Reacquired stock or repurchases of common stock	$ 0			$ (671,000,000)
Issued for employee savings and option plans (in shares)				2.8
Issued for employee savings and option plans			202,000,000	$ 135,000,000
Stock compensation expense			53,000,000
Impact of Quantinuum contribution			36,000,000
Net income attributable to Honeywell	1,463,000,000				1,463,000,000
Dividends on common stock					(707,000,000)
Net income attributable to noncontrolling interest	(12,000,000)						12,000,000
Foreign exchange translation adjustment	54,000,000					78,000,000	(24,000,000)
Pension and other postretirement benefit adjustments	(5,000,000)					(5,000,000)
Changes in fair value of cash flow hedges	14,000,000					14,000,000
Dividends paid							(4,000,000)
Contributions from noncontrolling interest holders							29,000,000
Treasury stock, ending balance (in shares) at Mar. 31, 2024				(306.4)
Ending balance at Mar. 31, 2024	$ 17,045,000,000	$ 958,000,000	9,353,000,000	$ (38,544,000,000)	48,735,000,000	(4,048,000,000)	591,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends per share of common stock (in dollars per share)	$ 1.08
Common stock, par value (in shares)	651.2	957.6
Total shareowners' equity (in shares)	651.2	957.6
Beginning balance at Dec. 31, 2024	$ 19,154,000,000		9,695,000,000	$ (39,378,000,000)	50,835,000,000	(3,491,000,000)	535,000,000
Treasury stock, beginning balance (in shares) at Dec. 31, 2024				(307.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reacquired stock or repurchases of common stock (in shares)				(8.9)
Reacquired stock or repurchases of common stock	(200,000,000)			$ (1,902,000,000)
Issued for employee savings and option plans (in shares)				1.8
Issued for employee savings and option plans			187,000,000	$ 80,000,000
Stock compensation expense			61,000,000
Impact of Quantinuum contribution			0
Net income attributable to Honeywell	1,449,000,000				1,449,000,000
Dividends on common stock					(734,000,000)
Net income attributable to noncontrolling interest	(18,000,000)						18,000,000
Foreign exchange translation adjustment	(278,000,000)					(290,000,000)	12,000,000
Pension and other postretirement benefit adjustments	11,000,000					11,000,000
Changes in fair value of cash flow hedges	(18,000,000)					(18,000,000)
Dividends paid							(4,000,000)
Contributions from noncontrolling interest holders							0
Treasury stock, ending balance (in shares) at Mar. 31, 2025				(314.9)
Ending balance at Mar. 31, 2025	$ 18,024,000,000	$ 958,000,000	$ 9,943,000,000	$ (41,200,000,000)	$ 51,550,000,000	$ (3,788,000,000)	$ 561,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends per share of common stock (in dollars per share)	$ 1.13
Common stock, par value (in shares)	642.7	957.6
Total shareowners' equity (in shares)	642.7	957.6