Investments in Joint Ventures	9 Months Ended
Investments in Joint Ventures	Sep. 30, 2011
Investments in Joint Ventures [Abstract]
Equity Method Investments Disclosure [Text Block]	INVESTMENTS IN JOINT VENTURES Kennedy-Wilson has a number of joint venture interests, generally ranging from 5% to approximately 50%, which were formed to acquire, manage and/or sell real estate. Kennedy-Wilson has significant influence over these entities, but not control, and accordingly, these investments are accounted for under the equity method. During the nine months ended September 30, 2011, Kennedy-Wilson invested in nine new joint ventures totaling $50.7 million and invested $2.7 million to buy out ownership interests from joint venture partners. During the same period, Kennedy-Wilson made $35.3 million in contributions to existing joint venture investments. Of this amount, $14.2 million, including $0.5 million of noncontrolling interests, was contributed by Kennedy-Wilson to its joint venture in Japan for the purposes of refinancing a large portion of the Japanese multifamily portfolio, $4.5 million was contributed by Kennedy-Wilson to refinance two multifamily projects in Kent, Washington, $3.6 million was contributed to pay down a loan on an existing residential investment in Walnut Creek, California, and $7.0 million was contributed to increase its interest in a project in Northern California. Additionally, during the nine months ended September 30, 2011, Kennedy-Wilson received $21.1 million in distributions from its joint ventures. As of September 30, 2011, Kennedy-Wilson has unfulfilled capital commitments totaling $15.6 million to its joint ventures. As we identify investment opportunities in the future, we may be called upon to contribute additional capital to joint ventures in satisfaction of our capital commitment obligations. Kennedy-Wilson has certain guarantees associated with loans secured by assets held in various joint venture partnerships. The maximum potential amount of future payments (undiscounted) Kennedy-Wilson could be required to make under the guarantees was approximately $21.4 million and $28.4 million as of September 30, 2011 and December 31, 2010, respectively. The guarantees expire through 2015 and Kennedy-Wilson’s performance under the guarantees would be required to the extent there is a shortfall upon liquidation between the principal amount of the loan and the net sales proceeds of the property. Based upon Kennedy-Wilson’s evaluation of guarantees under Estimated Fair Value of Guarantees ASC Subtopic 460-10, the estimated fair value of guarantees made as of September 30, 2011 and December 31, 2010 is immaterial

The entire disclosure for equity investment, or group of investments, for which combined disclosure is appropriate, including: (a) the name of each investee and percentage of ownership of common stock, (b) accounting policies for investments in common stock, (c) difference between the amount at which the investment is carried and the amount of underlying equity in net assets and the accounting treatment of the difference, (d) the total fair value of each identified investment for which a market value is available, (e) summarized information as to assets, liabilities, and results of operations of the investees (for investments in unconsolidated subsidiaries, common stock of joint ventures, or other investments using the equity method), and (f) material effects of possible conversions, exercises, or contingent issuances of the investee. Other disclosures include (a) the names of any investee in which the investor owns 20 percent or more of the voting stock and investment is not accounted for using the equity method, and the reasons why not, and (b) the names of any investee in which the investor owns less than 20 percent of the voting stock and the investment is accounted for using the equity method, and the reasons why it is.