LONG-TERM DEBT AND CREDIT AGREEMENTS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total long-term debt, including current portion	$ 12,628,000,000	$ 13,924,000,000
Less current portion	(2,872,000,000)	(1,351,000,000)
Total Noncurrent Debt	9,756,000,000	12,573,000,000
Long Term Debt By Maturity [Abstract]
2019	2,872,000,000
2020	1,416,000,000
2021	2,345,000,000
2022	22,000,000
2023	1,756,000,000
Thereafter	4,217,000,000
Total long-term debt, including current portion	12,628,000,000	13,924,000,000
Less current portion	(2,872,000,000)	(1,351,000,000)
Total Long-term debt	9,756,000,000	12,573,000,000
Notes 4.25% due 2021 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 800,000,000	800,000,000
Various interest rates	4.25%
Maturity date of debt instrument	Mar. 01, 2021
Notes 3.35% due 2023 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 300,000,000	300,000,000
Various interest rates	3.35%
Maturity date of debt instrument	Dec. 01, 2023
Notes 5.375% Due 2041 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 417,000,000	417,000,000
Various interest rates	5.375%
Maturity date of debt instrument	Mar. 01, 2041
Industrial development bond obligations, floating rate maturing at various dates through 2037 [Member]
Debt Instrument [Line Items]
Industrial development bond	$ 22,000,000	22,000,000
Maturity date of debt instrument	Dec. 31, 2037
Debentures 6.625% due 2028 [Member]
Debt Instrument [Line Items]
Debentures	$ 201,000,000	201,000,000
Various interest rates	6.625%
Maturity date of debt instrument	Jun. 15, 2028
Debentures 9.065% due 2033 [Member]
Debt Instrument [Line Items]
Debentures	$ 51,000,000	51,000,000
Various interest rates	9.065%
Maturity date of debt instrument	Jun. 01, 2033
Notes 5.70% due 2036 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 441,000,000	441,000,000
Various interest rates	5.70%
Maturity date of debt instrument	Mar. 15, 2036
Notes 5.70% due 2037 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 462,000,000	462,000,000
Various interest rates	5.70%
Maturity date of debt instrument	Mar. 15, 2037
Other including capitalized leases and debt issuance costs, 5.0% weighted average maturing at various dates through 2025 [Member]
Debt Instrument [Line Items]
Other long term debt	$ 353,000,000	288,000,000
Maturity date of debt instrument	Dec. 31, 2023
Debt Weighted Average Interest Rate	0.50%
Two year floating rate Euro notes due 2018 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 0	1,199,000,000
Maturity date of debt instrument	Feb. 22, 2018
Euro notes .65% due 2020 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 1,145,000,000	1,199,000,000
Various interest rates	0.65%
Maturity date of debt instrument	Feb. 21, 2020
Euro notes 1.30% due 2023 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 1,432,000,000	1,499,000,000
Various interest rates	1.30%
Maturity date of debt instrument	Feb. 22, 2023
Euro notes 2.25% due 2028 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 859,000,000	900,000,000
Various interest rates	2.25%
Maturity date of debt instrument	Feb. 22, 2028
Notes 1.40% due 2019 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 1,250,000,000	1,250,000,000
Various interest rates	1.40%
Maturity date of debt instrument	Oct. 30, 2019
Three year floating rate notes due 2019 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 250,000,000	250,000,000
Maturity date of debt instrument	Oct. 30, 2019
Notes 1.85% due 2021 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 1,500,000,000	1,500,000,000
Various interest rates	1.85%
Maturity date of debt instrument	Nov. 01, 2021
Notes 2.50% due 2026 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 1,500,000,000	1,500,000,000
Various interest rates	2.50%
Maturity date of debt instrument	Nov. 01, 2026
Notes 1.8% due 2019 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 750,000,000	750,000,000
Various interest rates	1.80%
Debt Instrument, Issuance Date	Oct. 30, 2017
Maturity date of debt instrument	Oct. 30, 2019
Notes 3.812% due 2047
Debt Instrument [Line Items]
Senior Notes	$ 445,000,000	445,000,000
Various interest rates	3.812%
Debt Instrument, Issuance Date	Nov. 21, 2017
Payments of debt issuance costs	$ 133,000,000
Maturity date of debt instrument	Nov. 21, 2047
Debt Instrument Description	In November of 2017, the Company issued $445 million 3.812% Senior Notes due 2047 (the “Exchange Notes”). The Exchange Notes are senior unsecured and unsubordinated obligations of Honeywell and rank equally with all of Honeywell’s existing and future senior unsecured debt and senior to all of Honeywell’s subordinated debt. The Exchange Notes were issued in partial exchange for the 6.625% Debentures due 2028, the 5.70% Notes due 2036, the 5.70% Notes due 2037 and the 5.375% Notes due 2041. The Company paid $133 million to bondholders in connection with the partial exchange. On January 29, 2018, the Company completed an exchange offer for any and all of its outstanding Exchange Notes, which had not been registered under the Securities Act of 1933, as amended (“Securities Act”) for an equal principal amount of new 3.812% Notes due 2047 which had been registered under the Securities Act (“Registered Notes”). 99.4% of the Exchange Notes were exchanged for Registered Notes, representing 99.4% of the principal amount of the Company’s outstanding 3.812% Notes due 2047.
Debt Instrument Exchange Date	Jan. 29, 2018
Outstanding Principal Amount Exchanged Percentage	99.40%
$450 million Floating Rate Senior Notes due 2019 and $750 million 1.80% Senior Notes due 2019
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	Oct. 30, 2017
Two Year Floating Rate Notes Due 2019 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 450,000,000	$ 450,000,000
Debt Instrument, Issuance Date	Oct. 30, 2017
Maturity date of debt instrument	Oct. 30, 2019
Garrett Pre-separation Funding [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Long-term Debt	$ 1,604,000,000
Debt Instrument, Issuance Date	Sep. 27, 2018
Resideo Pre-separation Funding [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Long-term Debt	$ 1,197,000,000
Debt Instrument, Issuance Date	Oct. 25, 2018
Syndicate Of Banks [Member] | $1.5B 364-Day Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Facility initiation date	Feb. 16, 2018
Facility expiration date	Nov. 09, 2018
Line of credit facility, current borrowing capacity	$ 1,500,000,000
Syndicate Of Banks [Member] | $1.5B Second 364-Day Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Facility initiation date	Apr. 27, 2018
Facility expiration date	Apr. 26, 2019
Line of credit facility, current borrowing capacity	$ 1,500,000,000
Line of credit facility, maximum borrowing capacity	1,500,000,000
Line Of Credit Facility Remaining Borrowing Capacity	$ 1,500,000,000
Syndicate Of Banks [Member] | Five Year Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Facility initiation date	Apr. 27, 2018
Line of credit facility, current borrowing capacity	$ 4,000,000,000
Line of credit facility, maximum borrowing capacity	4,500,000,000
Line Of Credit Facility Remaining Borrowing Capacity	$ 4,000,000,000
Syndicate Of Banks [Member] | Prior Agreement [Member]
Line Of Credit Facility [Line Items]
Facility initiation date	Jul. 10, 2015
Facility expiration date	Apr. 26, 2018
Line of credit facility, current borrowing capacity	$ 4,000,000