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v3.22.2.2

Subsequent Events (Details) - Subsequent Event - Term Loan $ in Millions | Oct. 03, 2022 USD ($)
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Subsequent Event [Line Items] |
Debt Instrument, Increase (Decrease) borrowing capacity | $ 50.0
Debt Instrument, Unused Borrowing Capacity, Amount | $ 360.0

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- Definition Debt Instrument, Increase (Decrease) borrowing capacity + References No definition available. + Details
Name: | kbh_DebtInstrumentIncreaseDecreaseBorrowingCapacity
Namespace Prefix: | kbh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DebtInstrumentAxis=kbh_TermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |