XML 45 R31.htm IDEA: XBRL DOCUMENT
v3.26.1

Initial Public Offering (Details) - $ / shares | Jun. 11, 2025 | Dec. 31, 2025
--- | --- | ---
Disclosure Initial Public Offering Line Items [Line Items] |  |
Aggregate number of shares purchased | 25,300,000 |
Number of Shares Per Unit | 0.5 |
Warrants exercisable period from IPO | 12 months |
Warrants exercisable period after the completion of a Business Combination | 30 days |
Warrants exercisable term | 5 years |
Public warrants |  |
Disclosure Initial Public Offering Line Items [Line Items] |  |
Warrants exercisable period from IPO | 12 months |
Warrants exercisable period after the completion of a Business Combination | 30 days |
Warrants exercisable term | 5 years |
Class A ordinary shares |  |
Disclosure Initial Public Offering Line Items [Line Items] |  |
Share issue price per share |  | $ 10
Number of shares for each warrant | 1 |
Exercise price of warrant | $ 11.5 |
Class A ordinary shares | Public warrants |  |
Disclosure Initial Public Offering Line Items [Line Items] |  |
Exercise price of warrant | $ 11.5 |
Class A ordinary shares | Public Warrant [Member] |  |
Disclosure Initial Public Offering Line Items [Line Items] |  |
Number of shares for each warrant | 1 |
IPO |  |
Disclosure Initial Public Offering Line Items [Line Items] |  |
Share issue price per share | $ 10 |
IPO | Class A ordinary shares |  |
Disclosure Initial Public Offering Line Items [Line Items] |  |
Number of Shares Per Unit | 1 |
Over-Allotment Option |  |
Disclosure Initial Public Offering Line Items [Line Items] |  |
Aggregate number of shares purchased | 3,300,000 |

X
- Definition Represents the warrants exercisable period after the completion of a Business Combination. + References No definition available. + Details
Name: | BLUW_ClassOfWarrantOrRightExercisablePeriodAfterCompletionOfBusinessCombination
Namespace Prefix: | BLUW_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period after the closing of the initial public offering after which public warrants become exercisable. + References No definition available. + Details
Name: | BLUW_ClassOfWarrantOrRightExercisablePeriodFromInitialPublicOffering
Namespace Prefix: | BLUW_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the individual quantitative and descriptive elements that provide details of the entity's initial public offering, including amounts, prices, securities issued, proceeds, underwriting fees, and other related disclosures within the IPO table. + References No definition available. + Details
Name: | BLUW_DisclosureInitialPublicOfferingLineItems
Namespace Prefix: | BLUW_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares in a unit. + References No definition available. + Details
Name: | BLUW_NumberOfSharesPerUnit
Namespace Prefix: | BLUW_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of units issued during period. + References No definition available. + Details
Name: | BLUW_NumberOfUnitsIssuedDuringPeriod
Namespace Prefix: | BLUW_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_WarrantsAndRightsOutstandingTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=BLUW_PublicWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=BLUW_PublicWarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |