Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Apr. 14, 2021	May 12, 2020
Document And Entity Information
Entity Registrant Name	CANNONAU CORP.
Entity Central Index Key	0001410187
Document Type	10-K
Document Period End Date	Dec. 31, 2020
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Is Entity a Shell Business	false
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Interactive Data Current	Yes
Is Entity Emerging Growth Company?	false
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Public Float			$ 12,721
Entity Common Stock, Shares Outstanding		1,827,350
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020