Cover Page	3 Months Ended
	Mar. 31, 2022 $ / shares shares
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity Shell Company	false
Entity Interactive Data Current	Yes
Document Period End Date	Mar. 31, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Information [Line Items]
Entity Registrant Name	Dow Inc.
Entity Tax Identification Number	30-1128146
Entity File Number	001-38646
Entity Incorporation, State or Country Code	DE
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Central Index Key	0001751788
Current Fiscal Year End Date	--12-31
Entity Addresses [Line Items]
Entity Address, Address Line One	2211 H.H. Dow Way
Entity Address, City or Town	Midland
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48674
City Area Code	989
Local Phone Number	636-1000
Entity Listings [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	DOW
Security Exchange Name	NYSE
Entity Listing, Par Value Per Share | $ / shares	$ 0.01
Entity Common Stock, Shares Outstanding | shares	728,101,842
The Dow Chemical Company
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity Shell Company	false
Entity Interactive Data Current	Yes
Document Period End Date	Mar. 31, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Information [Line Items]
Entity Registrant Name	The Dow Chemical Company
Entity Tax Identification Number	38-1285128
Entity File Number	001-03433
Entity Incorporation, State or Country Code	DE
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Central Index Key	0000029915
Current Fiscal Year End Date	--12-31
Entity Addresses [Line Items]
Entity Address, Address Line One	2211 H.H. Dow Way
Entity Address, City or Town	Midland
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48674
City Area Code	989
Local Phone Number	636-1000
Entity Listings [Line Items]
Entity Listing, Par Value Per Share | $ / shares	$ 0.01
Entity Common Stock, Shares Outstanding | shares	100
The Dow Chemical Company | 0.500% Notes due March 15, 2027
Entity Listings [Line Items]
Title of 12(b) Security	0.500% Notes due March 15, 2027
Trading Symbol	DOW/27
Security Exchange Name	NYSE
The Dow Chemical Company | 1.125% Notes due March 15, 2032
Entity Listings [Line Items]
Title of 12(b) Security	1.125% Notes due March 15, 2032
Trading Symbol	DOW/32
Security Exchange Name	NYSE
The Dow Chemical Company | 1.875% Notes due March 15, 2040
Entity Listings [Line Items]
Title of 12(b) Security	1.875% Notes due March 15, 2040
Trading Symbol	DOW/40
Security Exchange Name	NYSE
The Dow Chemical Company | 4.625% Notes due October 1, 2044
Entity Listings [Line Items]
Title of 12(b) Security	4.625% Notes due October 1, 2044
Trading Symbol	DOW/44
Security Exchange Name	NYSE