S-K 1602(b)(6) Prospectus Summary, Sponsor Compensation - Oceanhawk Acquisition I Sponsor LLC [Member]	May 19, 2026 USD ($) $ / shares shares
Office space, administrative and support services [Member]
SPAC Prospectus Summary, Sponsor Compensation [Line Items]
Price Paid or to be Paid for Securities, Total Amount	$ 10,000
Repayment of loans [Member]
SPAC Prospectus Summary, Sponsor Compensation [Line Items]
Price Paid or to be Paid for Securities, Total Amount	300,000
Working capital loans [Member]
SPAC Prospectus Summary, Sponsor Compensation [Line Items]
Price Paid or to be Paid for Securities, Total Amount	$ 1,500,000
Price Paid or to be Paid for Securities, Per Share (in Dollars per share) \| $ / shares	$ 10
Class B ordinary shares [Member]
SPAC Prospectus Summary, Sponsor Compensation [Line Items]
Price Paid or to be Paid for Securities, Total Amount	$ 25,000
Securities Issued or to be Issued, Shares (in Shares) \| shares	5,750,000
Private Placement Units [Member]
SPAC Prospectus Summary, Sponsor Compensation [Line Items]
Price Paid or to be Paid for Securities, Total Amount	$ 3,000,000
Securities Issued or to be Issued, Shares (in Shares) \| shares	300,000