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STATEMENTS OF OPERATIONS (Parenthetical)	Dec. 31, 2024 shares
Maximum | Class B ordinary shares
Number of shares subject to forfeiture	750,000

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- Definition

The total number of shares that are subject to forfeiture to the extent of partial exercise of the over-allotment option of underwriter.

+ References

No definition available.

+ Details

Name:	BLUW_NumberOfSharesSubjectToForfeiture
Namespace Prefix:	BLUW_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

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- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: