Basis of Presentation and Significant Accounting Policies - Summary of Change in Inventories from Spin-Off (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Inventory [Line Items]
Total inventories	$ 6,998,924	$ 5,465,290
Homesite inventory and other related assets
Inventory [Line Items]
Land acquired from Rausch	445,600
Investments in homesite inventory and other related paydowns	1,022,703
Homesite inventory takedowns and other related paydowns	(680,825)
Interest receivable paid-in-kind	2,617
Total inventories	6,998,924
Homesite inventory and other related assets \| Rausch
Inventory [Line Items]
Land acquired from Rausch	1,158,303
Homesite inventory and other related assets \| Lennar
Inventory [Line Items]
Homesite inventory contributed by Lennar in Spin-Off	$ 5,496,126

Homesite inventory contributed.

No definition available.

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Namespace Prefix:	ck0002017206_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Homesite inventory takedowns and other related paydowns.

+ References

No definition available.

+ Details

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Namespace Prefix:	ck0002017206_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Paid-in-kind interest receivable.

+ References

No definition available.

+ Details

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Namespace Prefix:	ck0002017206_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481372/852-10-55-10

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483467/210-10-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents improvements to real estate during development for ultimate sale to third parties. Improvements may consist of project infrastructure and other expenditures necessary to completion of the development project which is generally of a long-term nature.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date, net of valuation allowances and impairment losses, of costs of land expected to be developed in the near term plus capitalized costs of development, for purposes of selling completed units to home buyers or commercial or industrial entities.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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Data Type:	xbrli:monetaryItemType
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- Details

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- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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