Basis of Presentation	9 Months Ended
Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION KW Group's unaudited interim consolidated financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in the financial statements prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") may have been condensed or omitted pursuant to SEC rules and regulations, although the Company believes that the disclosures are adequate to make their presentation not misleading. In the Company's opinion, all adjustments, consisting of only normal and recurring items, necessary for a fair presentation of the results of operations for the three and nine months ended September 30, 2017 and 2016 have been included. The results of operations for these periods are not necessarily indicative of results that might be expected for the full year ending December 31, 2017. For further information, your attention is directed to the footnote disclosures found in the Company's Annual Report on Form 10-K for the year ended December 31, 2016. Throughout these unaudited interim consolidated financial statements “KW Group,” is referenced which is defined as the Company and its subsidiaries that are consolidated in its financial statements under U.S. GAAP (including KWE as defined below). All significant intercompany balances and transactions have been eliminated in consolidation. "KW," “KWH,” “Kennedy Wilson,” the “Company,” “we,” “our,” or “us” are also referred to which are defined as Kennedy-Wilson Holdings, Inc. and its wholly-owned subsidiaries. In addition, throughout these unaudited interim consolidated financial statements, “equity partners” is referred to which is defined as the non-wholly owned subsidiaries that are consolidated in the Company's financial statements under U.S. GAAP, including KWE, and third-party equity providers. Kennedy Wilson evaluates its relationships with other entities to identify whether they are variable interest entities ("VIEs") as defined in the ASC Subtopic 810-10, as amended by Accounting Standards Update ("ASU") 2015-02, and to assess whether it is the primary beneficiary of such entities. If the determination is made that Kennedy Wilson is the primary beneficiary, then that entity is included in the consolidated financial statements in accordance with the ASC Subtopic 810-10. The preparation of the accompanying consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosure about contingent assets and liabilities, and reported amounts of revenues and expenses. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. See comment in Note 4 about the preliminary nature of the estimates used in relation to acquisitions. KWE Kennedy Wilson Europe Real Estate Plc (“KWE,” LSE: KWE), a public limited company registered in Jersey formed to invest in real estate and real estate-related assets in Europe, closed its initial public offering ("IPO") on the London Stock Exchange during the quarter ended March 31, 2014. KWE is externally managed by a wholly-owned subsidiary of Kennedy Wilson incorporated in Jersey pursuant to an investment management agreement. Due to the terms provided in the investment management agreement and Kennedy Wilson's equity ownership interest in KWE, pursuant to the guidance set forth in Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Subtopic 810 - Consolidation (“Subtopic 810”), the Company is required to consolidate KWE’s results in its consolidated financial statements. As of September 30, 2017, the Company invested $492.6 million and owned approximately 23.8% of KWE’s total issued share capital. Prior to KWE's formation and for investments that do not meet KWE's investment guidelines, the Company (along with its equity partners) has directly invested in 17 properties and a servicing platform in Europe which had total assets of $1,028.2 million included in the Company's consolidated balance sheet and $295.3 million of equity as of September 30, 2017. As of September 30, 2017, the Company's weighted average ownership in these investments was 64%. On October 20, 2017, the Company completed its acquisition of all of the outstanding shares (other than shares owned by the Company or its subsidiaries or held in treasury) of KWE for $697.2 million in cash and issued 37,226,695 shares of KWH to shareholders of KWE stock. See Subsequent Events footnote for more information on the acquisition.

BASIS OF PRESENTATION

KW Group's unaudited interim consolidated financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in the financial statements prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") may have been condensed or omitted pursuant to SEC rules and regulations, although the Company believes that the disclosures are adequate to make their presentation not misleading. In the Company's opinion, all adjustments, consisting of only normal and recurring items, necessary for a fair presentation of the results of operations for the three and nine months ended September 30, 2017 and 2016 have been included. The results of operations for these periods are not necessarily indicative of results that might be expected for the full year ending December 31, 2017. For further information, your attention is directed to the footnote disclosures found in the Company's Annual Report on Form 10-K for the year ended December 31, 2016. Throughout these unaudited interim consolidated financial statements “KW Group,” is referenced which is defined as the Company and its subsidiaries that are consolidated in its financial statements under U.S. GAAP (including KWE as defined below). All significant intercompany balances and transactions have been eliminated in consolidation. "KW," “KWH,” “Kennedy Wilson,” the “Company,” “we,” “our,” or “us” are also referred to which are defined as Kennedy-Wilson Holdings, Inc. and its wholly-owned subsidiaries.

In addition, throughout these unaudited interim consolidated financial statements, “equity partners” is referred to which is defined as the non-wholly owned subsidiaries that are consolidated in the Company's financial statements under U.S. GAAP, including KWE, and third-party equity providers.

Kennedy Wilson evaluates its relationships with other entities to identify whether they are variable interest entities ("VIEs") as defined in the ASC Subtopic 810-10, as amended by Accounting Standards Update ("ASU") 2015-02, and to assess whether it is the primary beneficiary of such entities. If the determination is made that Kennedy Wilson is the primary beneficiary, then that entity is included in the consolidated financial statements in accordance with the ASC Subtopic 810-10.

The preparation of the accompanying consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosure about contingent assets and liabilities, and reported amounts of revenues and expenses. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. See comment in Note 4 about the preliminary nature of the estimates used in relation to acquisitions.

KWE

Kennedy Wilson Europe Real Estate Plc (“KWE,” LSE: KWE), a public limited company registered in Jersey formed to invest in real estate and real estate-related assets in Europe, closed its initial public offering ("IPO") on the London Stock Exchange during the quarter ended March 31, 2014. KWE is externally managed by a wholly-owned subsidiary of Kennedy Wilson incorporated in Jersey pursuant to an investment management agreement. Due to the terms provided in the investment management agreement and Kennedy Wilson's equity ownership interest in KWE, pursuant to the guidance set forth in Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Subtopic 810 - Consolidation (“Subtopic 810”), the Company is required to consolidate KWE’s results in its consolidated financial statements. As of September 30, 2017, the Company invested $492.6 million and owned approximately 23.8% of KWE’s total issued share capital.

Prior to KWE's formation and for investments that do not meet KWE's investment guidelines, the Company (along with its equity partners) has directly invested in 17 properties and a servicing platform in Europe which had total assets of $1,028.2 million included in the Company's consolidated balance sheet and $295.3 million of equity as of September 30, 2017. As of September 30, 2017, the Company's weighted average ownership in these investments was 64%.

On October 20, 2017, the Company completed its acquisition of all of the outstanding shares (other than shares owned by the Company or its subsidiaries or held in treasury) of KWE for $697.2 million in cash and issued 37,226,695 shares of KWH to shareholders of KWE stock. See Subsequent Events footnote for more information on the acquisition.