Basis of Presentation and Significant Accounting Policies	9 Months Ended
Aug. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies Basis of Presentation. The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with GAAP have been condensed or omitted. In our opinion, the accompanying unaudited consolidated financial statements contain all adjustments (consisting only of normal recurring accruals) necessary to present fairly our consolidated financial position as of August 31, 2017, the results of our consolidated operations for the three months and nine months ended August 31, 2017 and 2016, and our consolidated cash flows for the nine months ended August 31, 2017 and 2016. The results of our consolidated operations for the three months and nine months ended August 31, 2017 are not necessarily indicative of the results to be expected for the full year due to seasonal variations in operating results and other factors. The consolidated balance sheet at November 30, 2016 has been taken from the audited consolidated financial statements as of that date. These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements for the year ended November 30, 2016, which are contained in our Annual Report on Form 10-K for that period. Unless the context indicates otherwise, the terms “we,” “our,” and “us” used in this report refer to KB Home, a Delaware corporation, and its subsidiaries. Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and judgments that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. Cash and Cash Equivalents. We consider all highly liquid short-term investments purchased with an original maturity of three months or less to be cash equivalents. Our cash equivalents totaled $306.1 million at August 31, 2017 and $396.1 million at November 30, 2016. The majority of our cash and cash equivalents was invested in interest-bearing bank deposit accounts. Comprehensive Income. Our comprehensive income was $50.2 million for the three months ended August 31, 2017 and $39.4 million for the three months ended August 31, 2016. For the nine months ended August 31, 2017 and 2016, our comprehensive income was $96.2 million and $68.1 million, respectively. Our comprehensive income for each of the three-month and nine-month periods ended August 31, 2017 and 2016 was equal to our net income for the respective periods. Recent Accounting Pronouncements Not Yet Adopted. In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”). The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB issued Accounting Standards Update No. 2015-14, “Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date,” which delayed the effective date of ASU 2014-09 by one year. In 2016 and 2017, the FASB issued accounting standards updates that amended several aspects of ASU 2014-09. ASU 2014-09, as amended, is effective for us for annual and interim periods beginning December 1, 2018 (with early adoption permitted beginning in our 2018 fiscal year) and allows for full retrospective or modified retrospective methods of adoption. We expect to adopt ASU 2014-09 under the modified retrospective method in our 2019 first quarter. We are currently evaluating the potential impact of adopting this guidance on our consolidated financial statements and disclosures, and have been involved in industry specific discussions with the FASB on the treatment of certain items. We do not believe the adoption of ASU 2014-09 will have a material impact on the amount or timing of our homebuilding revenues. We are also continuing to evaluate the impact adopting this guidance may have on other aspects of our business. In February 2016, the FASB issued Accounting Standards Update No. 2016-02, “Leases (Topic 842)” (“ASU 2016-02”). ASU 2016-02 will require lessees to recognize on the balance sheet the assets and liabilities for the rights and obligations created by those leases. Under ASU 2016-02, a lessee will be required to recognize assets and liabilities for leases with lease terms of more than 12 months. Lessor accounting remains substantially similar to current GAAP. In addition, disclosures of leasing activities are to be expanded to include qualitative along with specific quantitative information. ASU 2016-02 will be effective for us beginning December 1, 2019 (with early adoption permitted) and mandates a modified retrospective transition method. We are currently evaluating the potential impact of adopting this guidance on our consolidated financial statements. In March 2016, the FASB issued Accounting Standards Update No. 2016-09, “Compensation — Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”). ASU 2016-09 simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 will be effective for us beginning December 1, 2017 (with early adoption permitted). We are currently evaluating the potential impact of adopting this guidance on our consolidated financial statements. In August 2016, the FASB issued Accounting Standards Update No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments” (“ASU 2016-15”). ASU 2016-15 provides guidance on how certain cash receipts and cash payments are to be presented and classified in the statement of cash flows. ASU 2016-15 will be effective for us beginning after December 1, 2018 (with early adoption permitted). We are currently evaluating the potential impact of adopting this guidance on our consolidated financial statements. In November 2016, the FASB issued Accounting Standards Update No. 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash” (“ASU 2016-18”). ASU 2016-18 requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. ASU 2016-18 will be effective for us beginning December 1, 2018 (with early adoption permitted) and will be applied using a retrospective transition method to each period presented. We are currently evaluating the potential impact of adopting this guidance on our consolidated financial statements. Reclassifications. Certain amounts in our consolidated financial statements for prior years have been reclassified to conform to the current period presentation.

Basis of Presentation and Significant Accounting Policies

Basis of Presentation. The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with GAAP have been condensed or omitted.

In our opinion, the accompanying unaudited consolidated financial statements contain all adjustments (consisting only of normal recurring accruals) necessary to present fairly our consolidated financial position as of August 31, 2017, the results of our consolidated operations for the three months and nine months ended August 31, 2017 and 2016, and our consolidated cash flows for the nine months ended August 31, 2017 and 2016. The results of our consolidated operations for the three months and nine months ended August 31, 2017 are not necessarily indicative of the results to be expected for the full year due to seasonal variations in operating results and other factors. The consolidated balance sheet at November 30, 2016 has been taken from the audited consolidated financial statements as of that date. These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements for the year ended November 30, 2016, which are contained in our Annual Report on Form 10-K for that period.

Unless the context indicates otherwise, the terms “we,” “our,” and “us” used in this report refer to KB Home, a Delaware corporation, and its subsidiaries.

Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and judgments that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.

Cash and Cash Equivalents. We consider all highly liquid short-term investments purchased with an original maturity of three months or less to be cash equivalents. Our cash equivalents totaled $306.1 million at August 31, 2017 and $396.1 million at November 30, 2016. The majority of our cash and cash equivalents was invested in interest-bearing bank deposit accounts.

Comprehensive Income. Our comprehensive income was $50.2 million for the three months ended August 31, 2017 and $39.4 million for the three months ended August 31, 2016. For the nine months ended August 31, 2017 and 2016, our comprehensive income was $96.2 million and $68.1 million, respectively. Our comprehensive income for each of the three-month and nine-month periods ended August 31, 2017 and 2016 was equal to our net income for the respective periods.

Recent Accounting Pronouncements Not Yet Adopted. In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”). The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB issued Accounting Standards Update No. 2015-14, “Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date,” which delayed the effective date of ASU 2014-09 by one year. In 2016 and 2017, the FASB issued accounting standards updates that amended several aspects of ASU 2014-09. ASU 2014-09, as amended, is effective for us for annual and interim periods beginning December 1, 2018 (with early adoption permitted beginning in our 2018 fiscal year) and allows for full retrospective or modified retrospective methods of adoption. We expect to adopt ASU 2014-09 under the modified retrospective method in our 2019 first quarter. We are currently evaluating the potential impact of adopting this guidance on our consolidated financial statements and disclosures, and have been involved in industry specific discussions with the FASB on the treatment of certain items. We do not believe the adoption of ASU 2014-09 will have a material impact on the amount or timing of our homebuilding revenues. We are also continuing to evaluate the impact adopting this guidance may have on other aspects of our business.

In February 2016, the FASB issued Accounting Standards Update No. 2016-02, “Leases (Topic 842)” (“ASU 2016-02”). ASU 2016-02 will require lessees to recognize on the balance sheet the assets and liabilities for the rights and obligations created by those leases. Under ASU 2016-02, a lessee will be required to recognize assets and liabilities for leases with lease terms of more than 12 months. Lessor accounting remains substantially similar to current GAAP. In addition, disclosures of leasing activities are to be expanded to include qualitative along with specific quantitative information. ASU 2016-02 will be effective for us beginning December 1, 2019 (with early adoption permitted) and mandates a modified retrospective transition method. We are currently evaluating the potential impact of adopting this guidance on our consolidated financial statements.

In March 2016, the FASB issued Accounting Standards Update No. 2016-09, “Compensation — Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”). ASU 2016-09 simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 will be effective for us beginning December 1, 2017 (with early adoption permitted). We are currently evaluating the potential impact of adopting this guidance on our consolidated financial statements.

In August 2016, the FASB issued Accounting Standards Update No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments” (“ASU 2016-15”). ASU 2016-15 provides guidance on how certain cash receipts and cash payments are to be presented and classified in the statement of cash flows. ASU 2016-15 will be effective for us beginning after December 1, 2018 (with early adoption permitted). We are currently evaluating the potential impact of adopting this guidance on our consolidated financial statements.

In November 2016, the FASB issued Accounting Standards Update No. 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash” (“ASU 2016-18”). ASU 2016-18 requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. ASU 2016-18 will be effective for us beginning December 1, 2018 (with early adoption permitted) and will be applied using a retrospective transition method to each period presented. We are currently evaluating the potential impact of adopting this guidance on our consolidated financial statements.

Reclassifications. Certain amounts in our consolidated financial statements for prior years have been reclassified to conform to the current period presentation.