Significant Accounting Policies	6 Months Ended
Apr. 30, 2018
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	Significant Accounting Policies Basis of Presentation The accompanying condensed consolidated financial statements include the accounts of Toll Brothers, Inc. (the “Company,” “we,” “us,” or “our”), a Delaware corporation, and its majority-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. Investments in 50% or less owned partnerships and affiliates are accounted for using the equity method unless it is determined that we have effective control of the entity, in which case we would consolidate the entity. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial information. The October 31, 2017 balance sheet amounts and disclosures included herein have been derived from our October 31, 2017 audited financial statements. Since the accompanying condensed consolidated financial statements do not include all the information and footnotes required by U.S. generally accepted accounting principles (“GAAP”) for complete financial statements, we suggest that they be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended October 31, 2017 (“2017 Form 10-K”). In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all adjustments, which are of a normal recurring nature, necessary to present fairly our financial position as of April 30, 2018; the results of our operations for the six-month and three-month periods ended April 30, 2018 and 2017; and our cash flows for the six-month periods ended April 30, 2018 and 2017. The results of operations for such interim periods are not necessarily indicative of the results to be expected for the full year. Reclassification The Condensed Consolidated Statement of Cash Flows for the six months ended April 30, 2017 was restated to reflect a reclassification of approximately $18.0 million of cash flow from “Net cash (used in) provided by operating activities” to “Net cash provided by (used in) investing activities” related to restricted investment activity. In addition, certain other prior period amounts have been reclassified to conform to the fiscal 2018 presentation. Recent Accounting Pronouncements In February 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income” (“ASU 2018-02”). ASU 2018-02 allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act enacted on December 22, 2017 and also requires entities to disclose their accounting policy for releasing income tax effects from accumulated other comprehensive income. We elected to adopt ASU 2018-02 in the first quarter of fiscal 2018, and the adoption did not have a material effect on our consolidated financial statements and disclosures. In March 2017, the FASB issued ASU No. 2017-07, “Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost” (“ASU 2017-07”). ASU 2017-07 requires an employer to report the service cost component of pension and other post-retirement benefit costs in the same line item as other compensation costs arising from services rendered by the pertinent employees while the other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations. We adopted ASU 2017-07 on November 1, 2017, and the adoption did not have a material effect on our consolidated financial statements and disclosures. In March 2016, the FASB issued ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”). ASU 2016-09 simplifies several aspects related to the accounting for share-based payment transactions, including the accounting for income taxes and forfeitures, statutory tax withholding requirements and classification on the statement of cash flows. We adopted ASU 2016-09 on November 1, 2017. Excess tax benefits or deficiencies for stock-based compensation are now reflected in our Condensed Consolidated Statements of Operations and Comprehensive Income as a component of income tax expense, whereas previously they were recognized in equity. We have also elected to account for forfeitures as they occur, rather than estimate expected forfeitures. As a result of adopting ASU 2016-09, the impact of recognizing excess tax benefits and deficiencies in our Condensed Consolidated Statements of Operations and Comprehensive Income resulted in a $4.0 million reduction in our income tax expense in the six-month period ended April 30, 2018. The remaining aspects of adopting ASU 2016-09 did not have a material impact on our financial statements and disclosures. In February 2017, the FASB issued ASU No. 2017-05, “Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets” (“ASU 2017-05”). ASU 2017-05 is meant to clarify the scope of the original guidance within Subtopic 610-20 that was issued in connection with ASU 2014-09, as defined below, which provides guidance for recognizing gains and losses from the transfer of nonfinancial assets in contracts with noncustomers. ASU 2017-05 also added guidance for partial sales of nonfinancial assets. ASU 2017-05 is effective for our fiscal year beginning November 1, 2018 and we are required to adopt ASU 2017-05 concurrent with the adoption of ASU 2014-09. We are currently evaluating the impact that the adoption of ASU 2017-05 may have on our consolidated financial statements and disclosures. In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), which provides guidance for revenue recognition. ASU 2014-09 affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets. ASU 2014-09 supersedes the revenue recognition requirements in Accounting Standards Codification (“ASC”) Topic 605, “Revenue Recognition,” and most industry-specific guidance. ASU 2014-09 also supersedes some cost guidance included in ASC Subtopic 605-35, “Revenue Recognition—Construction-Type and Production-Type Contracts.” The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under the current guidance. These judgments and estimates include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price, and allocating the transaction price to each separate performance obligation. In August 2015, the FASB issued ASU 2015-14 “Revenue from Contracts with Customers” (“ASU 2015-14”), which delays the effective date of ASU 2014-09 by one year. ASU 2014-09, as amended by ASU 2015-14, is effective for our fiscal year beginning November 1, 2018, and, at that time, we expect to adopt the new standard under the modified retrospective approach. We do not believe the adoption of ASU 2014-09 will have a material impact on the amount or timing of our home building revenues. However, we currently expect that the adoption of ASU 2014-09 will result in a reclassification to our current presentation of forfeited customer deposits in our Consolidated Statements of Operations and Comprehensive Income; a reclassification to our current presentation of certain model home costs in our Consolidated Balance Sheets; a change to our current accounting for certain deferred marketing costs as well as incomplete deliverables at the time a home closes; and a change to the timing of recognition of revenues and profits on land sale transactions and certain management fees that we earn from our unconsolidated entities. We are continuing to evaluate the impact the adoption of ASU 2014-09 may have on other aspects of our business and on our consolidated financial statements and disclosures. In February 2016, the FASB issued ASU No. 2016-02, “Leases” (“ASU 2016-02”), which requires an entity to recognize assets and liabilities on the balance sheet for the rights and obligations created by leased assets and provide additional disclosures. ASU 2016-02 is effective for our fiscal year beginning November 1, 2019, and, at that time, we will adopt the new standard using a modified retrospective approach. We are currently evaluating the impact that the adoption of ASU 2016-02 may have on our consolidated financial statements and disclosures.

Significant Accounting Policies

Basis of Presentation

The accompanying condensed consolidated financial statements include the accounts of Toll Brothers, Inc. (the “Company,” “we,” “us,” or “our”), a Delaware corporation, and its majority-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. Investments in 50% or less owned partnerships and affiliates are accounted for using the equity method unless it is determined that we have effective control of the entity, in which case we would consolidate the entity.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial information. The October 31, 2017 balance sheet amounts and disclosures included herein have been derived from our October 31, 2017 audited financial statements. Since the accompanying condensed consolidated financial statements do not include all the information and footnotes required by U.S. generally accepted accounting principles (“GAAP”) for complete financial statements, we suggest that they be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended October 31, 2017 (“2017 Form 10-K”). In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all adjustments, which are of a normal recurring nature, necessary to present fairly our financial position as of April 30, 2018; the results of our operations for the six-month and three-month periods ended April 30, 2018 and 2017; and our cash flows for the six-month periods ended April 30, 2018 and 2017. The results of operations for such interim periods are not necessarily indicative of the results to be expected for the full year.

Reclassification

The Condensed Consolidated Statement of Cash Flows for the six months ended April 30, 2017 was restated to reflect a reclassification of approximately $18.0 million of cash flow from “Net cash (used in) provided by operating activities” to “Net cash provided by (used in) investing activities” related to restricted investment activity. In addition, certain other prior period amounts have been reclassified to conform to the fiscal 2018 presentation.

Recent Accounting Pronouncements

In February 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income” (“ASU 2018-02”). ASU 2018-02 allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act enacted on December 22, 2017 and also requires entities to disclose their accounting policy for releasing income tax effects from accumulated other comprehensive income. We elected to adopt ASU 2018-02 in the first quarter of fiscal 2018, and the adoption did not have a material effect on our consolidated financial statements and disclosures.

In March 2017, the FASB issued ASU No. 2017-07, “Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost” (“ASU 2017-07”). ASU 2017-07 requires an employer to report the service cost component of pension and other post-retirement benefit costs in the same line item as other compensation costs arising from services rendered by the pertinent employees while the other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations. We adopted ASU 2017-07 on November 1, 2017, and the adoption did not have a material effect on our consolidated financial statements and disclosures.

In March 2016, the FASB issued ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”). ASU 2016-09 simplifies several aspects related to the accounting for share-based payment transactions, including the accounting for income taxes and forfeitures, statutory tax withholding requirements and classification on the statement of cash flows. We adopted ASU 2016-09 on November 1, 2017. Excess tax benefits or deficiencies for stock-based compensation are now reflected in our Condensed Consolidated Statements of Operations and Comprehensive Income as a component of income tax expense, whereas previously they were recognized in equity. We have also elected to account for forfeitures as they occur, rather than estimate expected forfeitures. As a result of adopting ASU 2016-09, the impact of recognizing excess tax benefits and deficiencies in our Condensed Consolidated Statements of Operations and Comprehensive Income resulted in a $4.0 million reduction in our income tax expense in the six-month period ended April 30, 2018. The remaining aspects of adopting ASU 2016-09 did not have a material impact on our financial statements and disclosures.

In February 2017, the FASB issued ASU No. 2017-05, “Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets” (“ASU 2017-05”). ASU 2017-05 is meant to clarify the scope of the original guidance within Subtopic 610-20 that was issued in connection with ASU 2014-09, as defined below, which provides guidance for recognizing gains and losses from the transfer of nonfinancial assets in contracts with noncustomers. ASU 2017-05 also added guidance for partial sales of nonfinancial assets. ASU 2017-05 is effective for our fiscal year beginning November 1, 2018 and we are required to adopt ASU 2017-05 concurrent with the adoption of ASU 2014-09. We are currently evaluating the impact that the adoption of ASU 2017-05 may have on our consolidated financial statements and disclosures.

In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), which provides guidance for revenue recognition. ASU 2014-09 affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets. ASU 2014-09 supersedes the revenue recognition requirements in Accounting Standards Codification (“ASC”) Topic 605, “Revenue Recognition,” and most industry-specific guidance. ASU 2014-09 also supersedes some cost guidance included in ASC Subtopic 605-35, “Revenue Recognition—Construction-Type and Production-Type Contracts.” The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under the current guidance. These judgments and estimates include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price, and allocating the transaction price to each separate performance obligation. In August 2015, the FASB issued ASU 2015-14 “Revenue from Contracts with Customers” (“ASU 2015-14”), which delays the effective date of ASU 2014-09 by one year. ASU 2014-09, as amended by ASU 2015-14, is effective for our fiscal year beginning November 1, 2018, and, at that time, we expect to adopt the new standard under the modified retrospective approach. We do not believe the adoption of ASU 2014-09 will have a material impact on the amount or timing of our home building revenues. However, we currently expect that the adoption of ASU 2014-09 will result in a reclassification to our current presentation of forfeited customer deposits in our Consolidated Statements of Operations and Comprehensive Income; a reclassification to our current presentation of certain model home costs in our Consolidated Balance Sheets; a change to our current accounting for certain deferred marketing costs as well as incomplete deliverables at the time a home closes; and a change to the timing of recognition of revenues and profits on land sale transactions and certain management fees that we earn from our unconsolidated entities. We are continuing to evaluate the impact the adoption of ASU 2014-09 may have on other aspects of our business and on our consolidated financial statements and disclosures.

In February 2016, the FASB issued ASU No. 2016-02, “Leases” (“ASU 2016-02”), which requires an entity to recognize assets and liabilities on the balance sheet for the rights and obligations created by leased assets and provide additional disclosures. ASU 2016-02 is effective for our fiscal year beginning November 1, 2019, and, at that time, we will adopt the new standard using a modified retrospective approach. We are currently evaluating the impact that the adoption of ASU 2016-02 may have on our consolidated financial statements and disclosures.