LONG-TERM DEBT AND CREDIT AGREEMENTS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total long-term debt, including current portion	$ 12,486,000,000	$ 12,628,000,000
Less current portion	(1,376,000,000)	(2,872,000,000)
Total Long-term debt	11,110,000,000	9,756,000,000
Long-term Debt, Fiscal Year Maturity [Abstract]
2020	1,376,000,000
2021	2,375,000,000
2022	1,242,000,000
2023	1,733,000,000
2024	780,000,000
Thereafter	4,980,000,000
Total long-term debt, including current portion	12,486,000,000	12,628,000,000
Less current portion	(1,376,000,000)	(2,872,000,000)
Total Long-term debt	11,110,000,000	9,756,000,000
Notes 1.40% due 2019 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 0	1,250,000,000
Various interest rates	1.40%
Repayments of Debt	$ 1,250,000,000
Three year floating rate notes due 2019 [Member]
Debt Instrument [Line Items]
Senior Notes	0	250,000,000
Repayments of Debt	250,000,000
Two Year Floating Rate Notes Due 2019 [Member]
Debt Instrument [Line Items]
Senior Notes	0	450,000,000
Repayments of Debt	450,000,000
Notes 1.8% due 2019 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 0	750,000,000
Various interest rates	1.80%
Repayments of Debt	$ 750,000,000
Euro notes .65% due 2020 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 1,123,000,000	1,145,000,000
Various interest rates	0.65%
Notes 4.25% due 2021 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 800,000,000	800,000,000
Various interest rates	4.25%
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%
Notes 2.15% Due 2022 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 600,000,000	0
Various interest rates	2.15%
Floating Rate Notes Due 2022 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 600,000,000	0
Euro notes 1.30% due 2023 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 1,404,000,000	1,432,000,000
Various interest rates	1.30%
Notes 3.35% due 2023 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 300,000,000	300,000,000
Various interest rates	3.35%
Notes 2.30& Due 2024 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 750,000,000	0
Various interest rates	2.30%
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%
Euro Notes 2.25% due 2028 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 842,000,000	859,000,000
Various interest rates	2.25%
Notes 2.70% Due 2029 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 750,000,000	0
Various interest rates	2.70%
Notes 5.70% due 2036 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 441,000,000	441,000,000
Various interest rates	5.70%
Notes 5.70% due 2037 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 462,000,000	462,000,000
Various interest rates	5.70%
Notes 5.375% due 2041 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 417,000,000	417,000,000
Various interest rates	5.375%
Notes 3.812% due 2047 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 445,000,000	445,000,000
Various interest rates	3.812%
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
Debentures 6.625% due 2028 [Member]
Debt Instrument [Line Items]
Debentures	$ 201,000,000	201,000,000
Various interest rates	6.625%
Debentures 9.065% due 2033 [Member]
Debt Instrument [Line Items]
Debentures	$ 51,000,000	51,000,000
Various interest rates	9.065%
Other (including finance leases and debt issuance costs), 6.6% weighted average maturing at various dates through 2025 [Member]
Debt Instrument [Line Items]
Other long term debt	$ 278,000,000	$ 353,000,000
Debt, Weighted Average Interest Rate	6.60%
Notes 2019 [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Long-term Debt	$ 2,700,000,000
Payments of Debt Issuance Costs	$ 18,000,000
Debt Instrument, Description	On August 8, 2019, the Company issued $600 million 2.15% Senior Notes due 2022, $600 million Floating Rate Senior Notes due 2022, $750 million 2.30% Senior Notes due 2024 and $750 million 2.70% Senior Notes due 2029 (collectively the "2019 Notes").
Garrett Preseparation Funding [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Long-term Debt	$ 1,604,000,000
Resideo Pre-separation Funding [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Long-term Debt	1,197,000,000
Syndicate Of Banks [Member] | $1.5B Second 364-Day Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of credit facility, current borrowing capacity	1,500,000,000
Line of credit facility, maximum borrowing capacity	$ 1,500,000,000
Borrowing capacity description	On April 26, 2019, the Company entered into a $1.5 billion 364-Day Credit Agreement with a syndicate of banks. This 364-Day Credit Agreement is maintained for general corporate purposes.
Line of Credit Facility, Remaining Borrowing Capacity	$ 1,500,000,000
Syndicate Of Banks [Member] | 5 Year Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of credit facility, current borrowing capacity	4,000,000,000.0
Line of credit facility, maximum borrowing capacity	$ 4,500,000,000
Borrowing capacity description	On April 26, 2019, the Company entered into a $4.0 billion Amended and Restated Five Year Credit Agreement (the “5-Year Credit Agreement”), with a syndicate of banks. The 5-Year Credit Agreement is maintained for general corporate purposes.
Line of Credit Facility, Remaining Borrowing Capacity	$ 4,000,000,000
Syndicate Of Banks [Member] | Prior Agreement [Member]
Line of Credit Facility [Line Items]
Line Of Credit Facility Borrowing Capacity Of Prior Agreement	$ 4,000,000,000.0