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Document and Entity Information
6 Months Ended
May 31, 2016
shares
Document and Entity Information [Abstract]  
Entity Registrant Name KB Home
Trading Symbol KBH
Entity Central Index Key 0000795266
Document Type 10-Q
Document Period End Date May 31, 2016
Amendment Flag false
Document Fiscal Year Focus 2016
Document Fiscal Period Focus Q2
Current Fiscal Year End Date --11-30
Entity Filer Category Large Accelerated Filer
Entity Common Stock Shares Outstanding 84,246,127