Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 29, 2022
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Annual Report	true
Document Transition Report	false
Period End Date	Dec. 31, 2021
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Current Fiscal Year End Date	--12-31
File Number	333-216180
Registrant Name	CRONA CORP.
Entity Central Index Key	0001696411
Identification Number	35-2574778
Incorporation State Country Code	NV
Address Line1	Strada Jean-Louis Calderon 31
Address City Or Town	Buchares
Address Country	RO
Address Postal Zip Code	030167
City Area Code	403
Local Phone Number	71700107
WellKnown Seasoned Issuer	No
Voluntary Filers	No
Current Reporting Status	Yes
Interactive Data Current	No
Filer Category	Non-accelerated Filer
Small Business	true
Emerging Growth Company	true
Elected Not To Use the Extended Transition Period	false
Shell Company	false
Public Float	$ 0
Common Stock Shares Outstanding		6,087,500
Contact Personnel Email Address	management@corpcrona.com
Auditor Firm Id	3289
Auditor Name	Accell Audit & Compliance, PA
Auditor Location	Tampa, Florida