Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 28, 2022	Jun. 30, 2021
Document Information Line Items
Entity Registrant Name	Shelter Acquisition Corp I
Trading Symbol	SHQA
Document Type	10-K
Current Fiscal Year End Date	--12-31
Entity Public Float			$ 215,662,959.12
Amendment Flag	false
Entity Central Index Key	0001844908
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	Dec. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Document Annual Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	DE
Entity File Number	001-40567
Entity Tax Identification Number	86-1273121
Entity Address, Address Line One	6 Midland Street #1726
Entity Address, City or Town	Quogue
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	11959
City Area Code	(631)
Local Phone Number	553-2164
Title of 12(b) Security	Class A common stock included as part of the units
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Auditor Firm ID	688
Auditor Name	Marcum LLP
Auditor Location	New York, NY
Class A Common Stock
Document Information Line Items
Entity Common Stock, Shares Outstanding		22,164,744
Class B Common Stock
Document Information Line Items
Entity Common Stock, Shares Outstanding		5,541,186