Kennedy-Wilson (KW) 10-Q 10 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Nov. 07, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'Kennedy-Wilson Holdings, Inc.	'
Entity Central Index Key	'0001408100	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	94,807,377

Consolidated_Balance_Sheets_Un

Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Assets	'	'
Cash and cash equivalents	$236.30	$170.20
Cash held by consolidated investments (including $40.6 and $0 of restricted cash)	591.3	8
Accounts receivable (including $8.5 and $11.4 of related party)	42.2	16.6
Loans (including $0 and $4.1 of related party)	266.7	56.8
Real estate and acquired in place lease values, net of accumulated depreciation and amortization	3,839.60	688.1
Unconsolidated investments	504.9	786.1
Other assets	232.3	73
Total assets	5,713.30	1,798.80
Liabilities	'	'
Accounts payable, accrued expenses and other liabilities	253.8	129.1
Investment debt	2,049.80	401.8
Senior notes payable	705.9	409
Junior subordinated debentures	0	40
Total liabilities	3,009.50	979.9
Equity	'	'
Cumulative preferred stock, $0.0001 par value per share: 1,000,000 shares authorized $1,000 per share liquidation preference	0	0
Common stock, 94,807,377 and 82,592,607 shares issued and outstanding as of September 30, 2014 and December 31, 2013	0	0
Additional paid-in capital	991.2	801.3
Accumulated deficit	-22.6	-42.2
Accumulated other comprehensive income	-13.2	9.2
Total Kennedy-Wilson Holdings, Inc. shareholders' equity	955.4	768.3
Noncontrolling interests	1,748.40	50.6
Total equity	2,703.80	818.9
Total liabilities and equity	$5,713.30	$1,798.80

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Assets, Current [Abstract]	'	'
Restricted cash	$40.60	$0
Accounts receivable b related parties	8.5	11.4
Loans b related parties	$0	$4.10
Stockholders' Equity Attributable to Parent [Abstract]	'	'
Common stock, shares issued	94,807,377	82,592,607
Common stock, shares outstanding	94,807,377	82,592,607
Cumulative Preferred Stock Subject to Mandatory Redemption [Member]	'	'
Stockholders' Equity Attributable to Parent [Abstract]	'	'
Preferred stock, par value	$0.00	$0.00
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, liquidation preference per share	$1,000	$1,000

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended				9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Revenue	'		'		'		'
Investment management, property services and research fees (includes $6.2, $15.7, $47.0, and $37.8 of related party fees)	$12.90		$20.90		$65		$54
Rental and hotel	93.5		10.5		161.3		27.3
Sales of real estate	1.6		1.6		19		10.1
Loans and other	5.7		0.5		11.7		1.4
Total revenue	113.7		33.5		257		92.8
Operating expenses	'		'		'		'
Commission and marketing	2		1		3.8		2.8
Rental and hotel operating	37.8		4.2		69.9		11.9
Cost of real estate sold	1.1		0.9		14.6		7.9
Compensation and related	26.8		20.9		79.6		52.8
General and administrative	11.8		5.8		28.3		17.6
Depreciation and amortization	34.7		4.5		67.3		12
Total operating expenses	114.2		37.3		263.5		105
Income from unconsolidated investments	12.1		13.2		45.9		30.1
Operating income	11.6		9.4		39.4		17.9
Non-operating income (expense)	'		'		'		'
Acquisition-related gains	28.9		1.6		199.2		11.1
Acquisition-related expenses	-5.3		0		-16.9		-0.5
Interest expense-investment	-13.8		-2.8		-30.2		-7.4
Interest expense - corporate	-15.9	[1]	-10.3	[1]	-41.1	[1]	-29.7	[1]
Other (expense) income	-1.9		0.1		1		0.5
Income (loss) before (provision for) benefit from income taxes	3.6		-2		151.4		-8.1
(Provision for) benefit from income taxes	-6.6		-0.8		-40.8		1.4
Net income (loss)	-3		-2.8		110.6		-6.7
Net loss (income) attributable to the noncontrolling interests	2.8		0.7		-59.9		2.6
Preferred dividends and accretion of preferred stock issuance costs	-2		-2		-6.1		-6.1
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	($2.20)		($4.10)		$44.60		($10.20)
Basic earnings per share	'		'		'		'
Income (loss) per basic (in dollars per share)	($0.03)		($0.06)		$0.47		($0.15)
Weighted average shares outstanding for basic (in shares)	89,267,838		72,643,000		88,854,215		68,486,876
Diluted earnings per share	'		'		'		'
Income (loss) per diluted (in dollars per share)	($0.03)		($0.06)		$0.47		($0.15)
Weighted average shares outstanding for diluted (in shares)	89,267,838	[2]	72,643,000	[2]	90,169,008	[2]	68,486,876	[2]
Dividends declared per common share (in dollars per share)	$0.09		$0.07		$0.27		$0.21
[1]	Includes early extinguishment of corporate debt
[2]	For the three months ended September 30, 2014, a total of 12,993,531 potentially dilutive securities have not been included in the diluted weighted average shares as they are anti-dilutive. For the three and nine months ended September 30, 2013, a total of 19,315,303 and 19,620,824 potentially dilutive securities have not been included in the diluted weighted average shares as they are anti-dilutive. Potentially anti-dilutive securities include preferred stock, warrants, and unvested restricted stock grants.

Consolidated_Statements_of_Ope1

Consolidated Statements of Operations (Unaudited) Consolidated Statements of Operations (Parenthetical) (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]	'	'	'	'
Investment management, property services, and research feesb related party	$6.20	$15.70	$47	$37.80

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive (Loss) Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net (loss) income	($3)	($2.80)	$110.60	($6.70)
Other comprehensive (loss) income, net of tax:	'	'	'	'
Unrealized foreign currency translation (loss) gain	-89	8.8	-67.1	-9.2
Amounts reclassified out of AOCI during the period	0	0	-7.1	0
Unrealized loss on marketable securities	-1.1	0	-1.1	0
Unrealized forward contract, foreign currency gain (loss)	20.1	-3.6	16.5	2.2
Total other comprehensive (loss) gain for the period	-70	5.2	-58.8	-7
Comprehensive (loss) income	-73	2.4	51.8	-13.7
Comprehensive loss (income) attributable to noncontrolling interests	58	0.7	-23.5	2.6
Comprehensive (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	($15)	$3.10	$28.30	($11.10)

Consolidated_Statement_of_Equi

Consolidated Statement of Equity (Unaudited) (USD $)	Total		Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income [Member]	Noncontrolling Interest [Member]	KWE [Member]	KWE [Member]	KWE [Member]
In Millions, except Share data, unless otherwise specified										Additional Paid-in Capital [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2013	$818.90		'	$0	$801.30	($42.20)	$9.20	$50.60	'	'	'
Balance, common shares (in shares) at Dec. 31, 2013	82,592,607		'	82,592,607	'	'	'	'	'	'	'
Balance, preferred shares (in shares) at Dec. 31, 2013	'		132,550	'	'	'	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'		'	'	'	'	'	'	'	'	'
Issuance of shares, net	190.6		'	'	190.6	'	'	'	'	'	'
Issuance of common stock (in shares)	'		'	9,201,250	'	'	'	'	'	'	'
Common stock issued under Amended and Restated 2009 Equity Participation Plan (in shares)	'		'	3,140,000	'	'	'	'	'	'	'
Shares forfeited	0		'	'	'	'	'	'	'	'	'
Shares forfeited (in shares)	'		'	-2,475	'	'	'	'	'	'	'
Repurchase and retirement of common stock	-2.9		'	'	-2.9	'	'	'	'	'	'
Repurchase and retirement of common stock (in shares)	'		'	-124,005	'	'	'	'	'	'	'
Stock compensation expense	8.7		'	'	8.7	'	'	'	'	'	'
Other comprehensive income:	'		'	'	'	'	'	'	'	'	'
Unrealized foreign currency translation gain, net of tax	-67.4		'	'	'	'	-31	-36.4	'	'	'
Unrealized forward contract foreign currency loss, net of tax	9.7		'	'	'	'	9.7	'	'	'	'
Unrealized loss on marketable securities	-1.1		'	'	'	'	-1.1	'	'	'	'
Preferred stock dividends	-6.1		'	'	'	-6.1	'	'	'	'	'
Common stock dividends	-25	[1]	'	'	'	-25	'	'	'	'	'
Net income	110.6		'	'	'	50.7	'	59.9	'	'	'
Consolidation of noncontrolling interests (Note 4)	291.8		'	'	'	'	'	291.8	'	'	'
Acquisition of KWE shares from noncontrolling interest holders	'		'	'	'	'	'	'	-16.8	'	-16.8
Contributions from noncontrolling interests	12.9		'	'	'	'	'	12.9	1,404.20	-6.5	1,410.70
Distributions to noncontrolling interests	-24.3		'	'	'	'	'	-24.3	'	'	'
Balance at Sep. 30, 2014	2,703.80		'	'	991.2	-22.6	-13.2	1,748.40	'	'	'
Balance, common shares (in shares) at Sep. 30, 2014	94,807,377		'	94,807,377	'	'	'	'	'	'	'
Balance, preferred shares (in shares) at Sep. 30, 2014	'		132,550	'	'	'	'	'	'	'	'
Balance at Mar. 31, 2014	'		'	'	'	'	'	'	'	'	'
Other comprehensive income:	'		'	'	'	'	'	'	'	'	'
Acquisition of KWE shares from noncontrolling interest holders	'		'	'	'	'	'	'	-16.8	'	'
Balance at Sep. 30, 2014	'		'	'	'	'	'	'	'	'	'
Balance, preferred shares (in shares) at Sep. 30, 2014	'		132,550	'	'	'	'	'	'	'	'
[1]	$0.0001 par value per share, 200,000,000 and 125,000,000 shares authorized as of SeptemberB 30, 2014 and 2013, respectively.

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013
Cash flows from operating activities:	'		'
Net (loss) income	$110.60		($6.70)
Adjustments to reconcile net income to net cash provided (used in) by operating activities:	'		'
Net gain from sale of real estate	-4.4		-2.7
Acquisition-related gain	-199.2		-11.1
Depreciation and amortization	67.3		12
Provision for (benefit from) deferred income taxes	40.8		-1
Amortization of deferred loan costs	3.8		1.6
Amortization of discount and accretion of premium on issuance of the senior notes and investment debt	-2.7		-0.9
Income from unconsolidated investments	-46.6		-30.3
Operating distributions from unconsolidated investments	78.9		42.7
Stock-based compensation	8.7		5.5
Change in assets and liabilities:	'		'
Accounts receivable	-18		-11.2
Other assets	0.4		-10.4
Accrued expenses and other liabilities	46.1		-4.6
Net cash from (used in) operating activities	85.7		-17.1
Cash flows from investing activities:	'		'
Additions to loans	-476.4		-30.3
Collections of loans	95.9		43
Net proceeds from sale of real estate	16.3		10.5
Purchases of and additions to real estate	-1,538.20		-115.9
Proceeds from settlement of foreign forward contracts	7.5		0
Purchases of foreign currency options	-2.2		0
Investment in marketable securities	-11.5		0
Proceeds from maturities of short term investments	0		10
Capitalized development costs	0		-1.3
Distributions from unconsolidated investments	99.3		143.3
Contributions to unconsolidated investments	-139.6		-314.3
Net cash used in investing activities	-1,948.90		-255
Cash flows from financing activities:	'		'
Borrowings under senior notes payable	297.2		0
Repayment of junior unsubordinated debt	-40		0
Borrowings under line of credit	90		125
Repayment of line of credit	-90		-125
Borrowings under investment debt	825.1		72.3
Repayment of investment debt	-32.2		-1.1
Debt issue costs	-28.5		-1.8
Issuance of common stock	190.6		276
Repurchase and retirement of common stock	-2.9		0
Repurchase of warrants	0		-1.4
Exercise of warrants	0		4.7
Proceeds from the issuance of KWE shares, net	1,351.10		0
Dividends paid	-28.4	[1]	-16.3	[1]
Change in restricted cash	-42.6		0
Acquisition of KWE shares from noncontrolling interest holders	-16.8		0
Contributions from noncontrolling interests, excluding KWE	12.9		0.9
Distributions to noncontrolling interests	-24.3		-0.4
Net cash provided by financing activities	2,461.20		332.9
Effect of currency exchange rate changes on cash and cash equivalents	10.8		-0.3
Net change in cash and cash equivalents	608.8	[2]	60.5	[2]
Cash and cash equivalents, beginning of period	178.2		120.9
Cash and cash equivalents, end of period	787		181.4
Supplemental cash flow information:	'		'
Interest	74.2		44.1
Income taxes	0.1		2.3
Supplemental disclosure of non-cash investing and financing activities:	'		'
Dividends declared but not paid on common stock	$8.50		$5.70
[1]	Common stock dividends were declared at the end of each quarter and paid in the following quarter. The amount declared and not paid is accrued on the consolidated balance sheet.
[2]	See discussion of non-cash effects in notes to cashflow statement.

Consolidated_Statements_of_Cas1

Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Mar. 28, 2013	Sep. 30, 2013	Feb. 28, 2014
		Six Hundred Fifteen Unit Apartment Complex in Northern CA [Member]	Note Receivable Due 2016	KWE [Member]
		Unit	Notes Receivable [Member]	Property
			Unit
Contribution of interest percentage in portfolio	'	'	'	50.00%
Number of properties held in portfolio contributed to new entity	'	'	'	14
Number of units real estate property	'	615	107	'
Equity method investment, ownership percentage	'	15.00%	'	'
Consolidated investment ownership percentage	'	94.00%	'	'
Note receivable, ownership percentage sold	'	'	50.00%	'
Notes receivable, decrease from deconsolidation	$96	'	'	'
Mortgage loans, decrease from deconsolidation	$78.70	'	'	'

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2014
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 we believe that the disclosures are adequate to make their presentation not misleading. In our 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, 2014 and 2013 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, 2014. For further information, your attention is directed to the footnote disclosures found in our Annual Report on Form 10-K for the year ended December 31, 2013. Throughout this unaudited interim consolidated financial statements we refer to “KW Group,” which we define as the Company and its subsidiaries that are consolidated in its financial statements under U.S. GAAP (including KWE).  All significant intercompany balances and transactions have been eliminated in consolidation. We also refer to “KWH,” “Kennedy Wilson,” the “Company,” “we,” “our,” or “us” which we define as Kennedy-Wilson Holdings, Inc. and its wholly-owned subsidiaries.
	Kennedy Wilson Europe Real Estate Plc (“KWE,” LSE: KWE), a Jersey investment company 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, raising approximately $1.7 billion in gross proceeds. 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.  Additionally, the Company invested $145.2 million of cash and contributed $58.3 million of assets acquired by the Company as part of the IPO. Subsequent to the IPO, the Company acquired an additional one million ordinary shares for $16.8 million and owned approximately 13.3% of KWE’s total issued share capital as of September 30, 2014.
	In addition, throughout these unaudited interim consolidated financial statements, we refer to our “equity partners,” which we define as the subsidiaries that we consolidate in our financial statements under U.S. GAAP (other than wholly-owned subsidiaries), including KWE, and affiliated third-party equity providers.
	In addition, Kennedy Wilson evaluates its relationships with other entities to identify whether they are variable interest entities ("VIEs") as defined in the FASB ASC Subtopic 810-10 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.

Summary_of_Significant_Account

Summary of Significant Accounting Policies and Adoption of New Accounting Pronouncements	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND ADOPTION OF NEW ACCOUNTING PRONOUNCEMENTS	'
	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND ADOPTION OF NEW ACCOUNTING PRONOUNCEMENTS
	REVENUE RECOGNITION—Performance fees or carried interests are allocated to the general partner, special limited partner or asset manager of our real estate funds and loan pool participations based on the cumulative performance of the funds and loan pools and are subject to preferred return thresholds of the limited partners and participants. At the end of each reporting period, we calculate the performance fee that would be due to the general partner, special limited partner or asset manager's interests for a fund or loan pool, pursuant to the fund agreement or participation agreements, as if the fair value of the underlying investments were realized as of such date, irrespective of whether such amounts have been realized. As the fair value of underlying investments varies between reporting periods, it is necessary to make adjustments to amounts recorded as performance fees to reflect either (a) positive performance resulting in an increase in the performance fee allocated to the general partner or asset manager or (b) negative performance that would cause the amount due to us to be less than the amount previously recognized as revenue, resulting in a negative adjustment to performance fees allocated to the general partner or asset manager. A majority of the performance fees are recognized in investment management revenue, and substantially all of the carried interest is recognized in income from unconsolidated investments in our consolidated statements of operations. Total performance fees recognized from inception through September 30, 2014 that may be reversed in future periods if there is negative fund or loan pool performance totaled $7.3 million. Performance fees accrued as of September 30, 2014 and December 31, 2013 were $7.3 million and $6.1 million, respectively, and are included in accounts receivable in the accompanying consolidated balance sheet.
	REAL ESTATE ACQUISITIONS—The purchase price of acquired properties is recorded to land, buildings and building improvements and intangible lease value (value of above-market and below-market leases, acquired in-place lease values, and tenant relationships, if any) based on their respective estimated fair values in accordance with ASC Subtopics 805-10 Business Combinations. Acquisition-related costs are expensed as incurred. The ownership of the other interest holders in consolidated subsidiaries is reflected as noncontrolling interests.
	The valuations of real estate are based on management estimates of the real estate assets using income and market approaches. The indebtedness securing the real estate is valued, in part, based on third party valuations and management estimates also using an income approach.
	NONCONTROLLING INTERESTS—Noncontrolling interests are reported within equity as a separate component of Kennedy Wilson's equity in accordance with ASC Subtopic 810-10, Noncontrolling Interests in Consolidated Financial Statements. Revenues, expenses, gains, losses, net income (loss), and other comprehensive income are reported in the consolidated statements of operations at the consolidated amounts and net income (loss) and comprehensive income attributable to noncontrolling interests are separately stated.
	FOREIGN CURRENCIES—The financial statements of subsidiaries located outside the United States are measured using the local currency as this is their functional currency. The assets and liabilities of these subsidiaries are translated at the rates of exchange at the balance sheet date, and income and expenses are translated at the average monthly rate. The foreign currencies include the euro, the British pound sterling, and the Japanese yen. Cumulative translation adjustments, to the extent not included in cumulative net income, are included in the consolidated statement of equity as a component of accumulated other comprehensive income.
	DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES—All derivative instruments are recognized as either assets or liabilities in the balance sheet at their respective fair values. For derivatives designated in hedging relationships, changes in fair value of cash flow hedges or net investment hedges are recognized in accumulated other comprehensive income, to the extent the derivative is effective at offsetting the changes in the item being hedged until the hedged item affects earnings. Changes in fair value for fair value hedges are recognized in earnings.
	INCOME TAXES—Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. In accordance with ASC Subtopic 740-10 Accounting for Uncertainty in Income Taxes, the effect of income tax positions is recognized only if those positions are more likely than not to be sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs.
	RECENT ACCOUNTING PRONOUNCEMENTS—On April 10, 2014, the FASB issued ASU 2014-08, which amends the definition of discontinued operations and requires additional disclosures for disposal transactions that do not meet the revised discontinued operations criteria. ASU 2014-08 is required to be adopted for fiscal years beginning after December 15, 2014, with early adoption permitted. Our early adoption of this pronouncement on January 1, 2014 did not have a material impact on KW Group's consolidated financial statements.
	In May 2014, the FASB issued an accounting standard update that will use a five step model to recognize revenue from customer contracts in an effort to increase consistency and comparability throughout global capital markets and across industries. The model will identify the contract, identify any separate performance obligations in the contract, determine the transaction price, allocate the transaction price and recognize revenue when the performance obligation is satisfied. The new standard will replace most existing revenue recognition in GAAP when it becomes effective for the Company on January 1, 2017. We have not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.
	The FASB did not issue any other ASCs during the first nine months of 2014 that we expect to be applicable and have a material impact on our financial position or results of operations.
	RECLASSIFICATIONS—Certain balances included in prior year's financial statements have been reclassified to conform with the current year's presentation.

Loans

Loans	9 Months Ended
	Sep. 30, 2014
Receivables [Abstract]	'
LOANS	'
	LOANS
	The following table summarizes KW Group's investment in loans at September 30, 2014 and December 31, 2013:
		September 30,		December 31,
	(Dollars in millions)	2014		2013
	Loans	$	266.7	$	52.7
	Loans — related parties	—		4.1
	Total loans	$	266.7	$	56.8
	During the first quarter of 2014, Kennedy Wilson acquired the loans secured by a five-star hotel located in Dublin, Ireland for $152.4 million. During the third quarter of 2014, Kennedy Wilson converted the loans into a 100% direct ownership interest in the hotel. See note 4 for further discussion. During the quarter ended March 31, 2014, Kennedy Wilson foreclosed on a 133,000 square foot retail center and an adjacent 2.4 acre vacant lot in Van Nuys, CA that had a loan balance of $30.4 million, and converted it into real estate.
	During the second quarter of 2014, KWE acquired five real estate loans under receivership which are secured against five properties located across England for $156.3 million. As of September 30, 2014, due to foreign currency fluctuations, the loans had a balance of $152.8 million. Also during the second quarter of 2014, KWE acquired subordinated notes secured by 20 commercial properties located throughout England and Scotland for $62.2 million. The subordinated notes were paid off in the third quarter. See note 4 for further discussion.
	During the third quarter of 2014, KWE acquired the loans secured by 13 properties throughout Ireland for $97.0 million. Also during the third quarter of 2014, loans that Kennedy Wilson held on a building in Maui, HI and two related-party funds were paid off.
	Loan income
	KW Group recognized interest income on loans of $5.7 million and $11.2 million during the three and nine months ended September 30, 2014, respectively, and $0.5 million and $1.3 million during the three and nine months ended September 30, 2013, respectively.

Real_Estate_and_InPlace_Lease_

Real Estate and In-Place Lease Value	9 Months Ended
	Sep. 30, 2014
Real Estate [Abstract]	'
Real Estate and In-Place Lease Value	'
	REAL ESTATE AND IN-PLACE LEASE VALUE
	The following table summarizes KW Group's investment in consolidated real estate properties at September 30, 2014 and December 31, 2013:
			September 30,				December 31,
	(Dollars in millions)		2014				2013
	Land		$	955.3			$	187.8
	Buildings		2,657.50				484.1
	Building improvements		48.4				12.7
	In-place lease value		267				29.8
			3,928.20				714.4
	Less accumulated depreciation and amortization		(88.6		)		(26.3		)
	Real estate, net		$	3,839.60			$	688.1
	Real property, including land, buildings, and building improvement, are included in real estate and are generally stated at cost. Buildings and building improvements are depreciated on a straight-line method over their estimated lives not to exceed 40 years. Acquired in-place lease values are recorded at their estimated fair value and depreciated over their respective weighted-average lease term which was 7.4 years at September 30, 2014.
	Consolidated Acquisitions
	The purchase of property is recorded to land, buildings, building improvements, and intangible lease value (including the value of above-market and below-market leases, acquired in-place lease values, and tenant relationships, if any) based on their respective estimated fair values. The purchase price generally approximates the fair value of the properties as acquisitions are generally transacted with third-party willing sellers.
	During the nine months ended September 30, 2014, KW Group acquired the following properties:
	(Dollars in millions)				At Acquisition(1)
	Date acquired	Type	Description	Location	Land			Building			Intangible assets			Investment debt			KWH Shareholders' Equity
	1/20/14	Commercial (2)	Portfolio of 14 commercial, retail, and industrial properties	United Kingdom	$	28.9		$	47.1		$	41.4		$	—		$	58.7
	2/20/14	Hotel	193 room hotel	Western U.S.	1.3			8.3			—			—			6.9
	2/28/14	Multifamily	24 apartment units, 2 penthouse units, and 1,000 square feet of retail	Ireland	0.6			15.1			0.4			9.6			6.5
	3/28/14	Commercial (3)	26 commercial properties throughout England and Scotland	United Kingdom	54			132			54			—			29.3
	3/31/14	Multifamily(4)	281 completed apartments and a partially completed residential block and 725k square feet of commercial space,	Ireland	32.7			80.9			1.2			78.9			35.9
	4/1/14	Commercial	98k square foot retail center	Western U.S.	2.4			5.8			0.4			6			1.9
	4/30/14	Multifamily	203 unit apartment building	Western U.S.	2.7			24			0.3			13.3			13.3
	6/25/14	Multifamily(3)	81 unit apartment building	Ireland	4.8			15			0.4			—			2.7
	6/26/14	Commercial(3)	13 commercial properties	Ireland	104.9			344.3			52.3			273.1			30.1
	6/27/14	Commercial(3)(5)	21 commercial properties throughout England and Scotland	United Kingdom	106.8			300.7			127			—			70.6
	6/30/14	Multifamily	542 unit apartment building	Western U.S.	38.3			57.5			0.6			77.2			18.6
	7/7/14	Hotel(3)	138 room hotel and golf course	Ireland	6.3			28.6			—			—			4.6
	7/29/14	Multifamily	3 property portfolio with 1,212 units	Western U.S.	21.3			106.2			1.4			86.7			42.2
	8/8/14	Hotel(3)	209 room hotel and two golf courses	United Kingdom	11.9			35.2			—			—			6.3
	8/28/14	Multifamily	118 unit apartment building	Western U.S.	2.1			18.6			0.1			13.5			7.3
	9/5/14	Commercial(3)	130k square foot retail center	Ireland	7			33.3			16.1			—			7.5
					$	426		$	1,252.60		$	295.6		$	558.3		$	342.4
	(1) Excludes acquisition expenses and net other assets
	(2) On February 28, 2014, the Company contributed its 50% interest in this portfolio to KWE as part of the Company's investment in KWE's initial public offering.
	(3) These portfolios of properties were directly acquired and held by KWE. Kennedy Wilson owns approximately 13.3% of the total issued share capital of KWE.
	(4) This asset was sold to KWE on June 24, 2014.
	(5) KWE recognized an acquisition-related gain of $15.5 million on the transaction due to its ability to acquire the underlying real estate at a discount to its fair value. See loans converted to real estate section below.
	Consolidation of previously unconsolidated investments
	On March 31, 2014, Kennedy Wilson and one of its equity partners amended and restated existing operating agreements governing six separate joint ventures that hold real estate-related investments located in the U.K. and Ireland.  Kennedy Wilson has an approximate 50% ownership interest in these investments.
	Additionally, on June 30, 2014, Kennedy Wilson and one of its equity partners amended and restated the existing operating agreement of KW Residential ("KWR") which governs 50 multifamily properties in and around Tokyo, Japan comprising approximately 2,400 units. Kennedy Wilson has an approximate 41% ownership interest in these investments.
	These joint ventures were previously accounted for on an equity method basis due to substantive participation of the equity partners in the operational control over the real estate assets.  The operating agreements of the investments were amended and restated to give Kennedy Wilson full operational control over the real estate assets while the equity partners retained only certain protective rights. Given that Kennedy Wilson now controls the joint ventures and the ultimate real estate assets held by the joint ventures under the amended and restated operating agreements, a change to the accounting treatment of these joint ventures from the equity method to consolidated treatment pursuant to ASC 810 Consolidation.
	As a result of gaining control, the assets and liabilities of these properties were consolidated in KW Group's financial statements at fair value in accordance with FASB ASC Topic 805 Business Combinations.  As the fair value of our interests in these properties were in excess of our carrying value, acquisition-related gains in the accompanying consolidated statement of operations for the nine months ended September 30, 2014 as further detailed below were recorded.  See Note 6 - Fair Value Measurements for further detail of the methodology used to determine the fair value of the assets and liabilities acquired in these transactions.
	The following table summarizes the assets and liabilities assumed as a result of gaining control of these properties and the acquisition-related gains recognized:
	(Dollars in millions)
	Property	Type	Location	Cash			Real estate and acquired in-place lease values			Accounts receivable and other assets			Accounts payable, accrued expenses, and other liabilities			Investment debt			Noncontrolling interests		Acquisition related gain(1)
	Three multifamily properties	Multifamily	Ireland	$	3.6		$	248.5		$	0.9		$	5.4		$	114.3		$	66.6	$	39.3
	Two office properties	Commercial	Ireland	4.3			223.9			7.6			4.9			75.2			77.9		33.5
	Two commercial properties and loans secured by real estate	Commercial & Loans	U.K.	9.6			195			5.6			8.1			100.8			62		11.9
	50 multifamily properties	Multifamily	Japan	21			501.2			14.3			4.6			283.7			146.8		66.7
				$	38.5		$	1,168.60		$	28.4		$	23		$	574		$	353.3	$	151.4
	(1) $63.1 million was allocated to noncontrolling interest expense for the portion the acquisition related gain that relates to our equity partners ownership in the properties.
	Loans converted to real estate
	During the quarter ended March 31, 2014, Kennedy Wilson foreclosed on a 133,000 square foot retail center and an adjacent 2.4 acre vacant lot in Van Nuys, CA. During the quarter ended September 30, 2014, Kennedy Wilson foreclosed on the notes secured by the iconic Shelbourne Hotel in Dublin, Ireland.
	As a result of the foreclosures and taking title to the properties, the assets and liabilities of the retail center and hotel were consolidated in KW Group's financial statements at fair value under FASB ASC Topic 805 - Business Combinations and the vacant lot was consolidated in KW Group's financial statements at fair market value. As the fair value of the assets was in excess of the basis in the previously held mortgage notes, Kennedy Wilson recognized a $3.7 million acquisition-related gain on the retail center and vacant land and a $28.6 million acquisition-related gain on the hotel.
	KWE acquired subordinated notes on a portfolio of commercial properties in the United Kingdom during the second quarter of 2014 and used its position as a debt holder to secure the transaction. KWE recognized an acquisition-related gain of $15.5 million on the transaction due to its ability to acquire the underlying real estate at a discount to its fair value.
	Pro forma results of operations
	The results of operations of the assets acquired have been included in our consolidated financial statements since the date of their acquisition. KW Group's unaudited pro forma results have been prepared for comparative purposes only and do not purport to be indicative of the results of operations that would have occurred had this acquisition been consummated at the beginning of the periods presented.
	The unaudited pro forma data presented below assumes that the acquisitions during the nine months ended September 30, 2014 occurred as of January 1, 2013.
			Unaudited								Unaudited
			Three Months Ended September 30,								Nine Months Ended September 30,
	(Dollars in millions, except for per share data)		2014				2013				2014				2013
Pro forma revenues		$	127.6			$	96.6			$	379.3			$	281.8
Pro forma income from unconsolidated investments		9.8				(0.9		)		35.8				(3.4		)
Pro forma net income (loss) attributable to Kennedy-Wilson Holdings, Inc. common shareholders (1)		(1.1		)		(12.1		)		(32.6		)		(21.7		)
Pro forma net income (loss) per share:
Basic		$	(0.01	)		$	(0.17	)		$	(0.37	)		$	(0.32	)
Diluted		$	(0.01	)		$	(0.17	)		$	(0.37	)		$	(0.32	)
(1) Excludes the effects of acquisition-related gains.

Unconsolidated_Investments

Unconsolidated Investments	9 Months Ended
	Sep. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]	'
Unconsolidated Investments	'
	UNCONSOLIDATED INVESTMENTS
	KW Group has unconsolidated investments through real estate related joint ventures and loan pool participations. The following table details its investments in joint ventures and loan pool participations as of September 30, 2014 and December 31, 2013:
			September 30,				December 31,
	(Dollars in millions)		2014				2013
	Investments in joint ventures		$	447.4			$	751.4
	Investments in loan pool participations		57.5				34.7
	Total		$	504.9			$	786.1
	Investments in Joint Ventures
	Kennedy Wilson has a number of joint venture interests, generally ranging from 5% to 50%, that were formed to acquire, manage, develop, service and/or sell real estate and invest in loan pools and discounted loan portfolios. Kennedy Wilson has significant influence over these entities, but not control, and accordingly, these investments are accounted for under the equity method.
	Joint Venture Holdings
	As of September 30, 2014 and December 31, 2013, Kennedy Wilson's investment in joint ventures totaled $447.4 million and $751.4 million, respectively.
	The following table details our investments in joint ventures by investment type and geographic location as of September 30, 2014:
	(Dollars in millions)	Multifamily			Commercial			Loan			Residential		Other			Total
	Western U.S.	$	145.2		$	105.8		$	50.1		$	67.6	$	—		$	368.7
	United Kingdom	—			37			—			—		—			37
	Spain	—			—			—			—		27			27
	Other	0.2			5			—			0.2		9.3			14.7
	Total	$	145.4		$	147.8		$	50.1		$	67.8	$	36.3		$	447.4
	The following table details our investments in joint ventures by investment type and geographic location as of December 31, 2013:
	(Dollars in millions)	Multifamily			Commercial			Loan			Residential		Other			Total
	Western U.S.	$	133.3		$	160.3		$	50.3		$	48.7	$	8		$	400.6
	Japan	68.8			—			—			—		—			68.8
	United Kingdom	—			104.5			6.3			—		—			110.8
	Ireland	48.2			96.1			—			—		—			144.3
	Spain	—			—			—			—		26.9			26.9
	Total	$	250.3		$	360.9		$	56.6		$	48.7	$	34.9		$	751.4
	Joint Venture Consolidation
	On June 30, 2014, Kennedy Wilson and one of its equity partners amended existing operating agreements governing KWR which was previously accounted for using the equity method. KWR is a joint venture investment in a portfolio of 50 apartment buildings comprised of approximately 2,400 units, located primarily in Tokyo and surrounding areas. Kennedy Wilson owns approximately 41% of KWR, not including any promoted interests. As a result of obtaining control of this investment, KWR was consolidated in KW Group's financial statements as of June 30, 2014. The investment is presented as an unconsolidated investment for prior periods. See Note 4.
	In addition to KWR, on March 31, 2014, Kennedy Wilson and one of its equity partners amended existing operating agreements governing investments for six investments in Europe which were accounted for using the equity method. As a result of obtaining control, the joint venture investments were consolidated in KW Group's financial statements as of March 31, 2014. The investments are presented as an unconsolidated investment for prior periods. See Note 4.
	Contributions to Joint Ventures
	During the nine months ended September 30, 2014, Kennedy Wilson made $114.5 million in contributions to new and existing joint venture investments.
	See the table below for a breakdown of contributions to new joint venture investments for the nine months ended September 30, 2014:
		Multifamily						Commercial					Residential
	(Dollars in millions)	Amount			No. of Properties			Amount			No. of Properties		Amount			No. of Properties			Total		No. of Properties
	Western U.S.	$	4		1			$	—		—		$	17		2			$	21	3
	United Kingdom(1)	—			—			57.2			14		—			—			57.2		14
	Total contributions	$	4		1			$	57.2		14		$	17		2			$	78.2	17
	(1) Kennedy Wilson's contribution in a joint venture investment that was subsequently contributed into KWE as part of its initial investment. See note 1.
	In addition to the capital contributions above, Kennedy Wilson contributed $36.3 million to existing joint ventures to fund our share of a development project, capital expenditures and for working capital needs.
	Distributions from Joint Ventures and Investments in Loan Pools
	During the nine months ended September 30, 2014, Kennedy Wilson received $178.2 million in operating and investing distributions from its joint ventures and loan pools. Investing distributions resulted from the refinancing of property level debt and asset sales. Operating distributions resulted from operating cash flow generated by the joint venture investments.
	The following table details cash distributions by investment type and geographic location for the nine months ended September 30, 2014:
		Multifamily						Commercial					Residential and Other						Loan Pools				Total
	(Dollars in millions)	Operating			Investing			Operating			Investing		Operating			Investing			Operating		Investing		Operating			Investing
	Western U.S.	$	7		$	1.5		$	18.9		42.6		5.6			$	4.7		$	0.3	$	2.5	$	31.8		$	51.3
	Japan	1.7			—			—			—		—			—			—		—		1.7			—
	United Kingdom	—			—			9			10.4		—			—			5.2		6.3		14.2			16.7
	Ireland	—			—			31.2			30.3		—			—			—		—		31.2			30.3
	Spain	—			—			—			—		—			1			—		—		—			1
	Total	$	8.7		$	1.5		$	59.1		$	83.3	$	5.6		$	5.7		$	5.5	$	8.8	$	78.9		$	99.3
	Variable Interest Entities
	We determine the appropriate accounting method with respect to all investments that are not VIEs based on the control-based framework (controlled entities are consolidated) provided by the consolidations guidance in FASB ASC Topic 810. Kennedy Wilson's determination considers specific factors cited under FASB ASC Topic 810-20 Control of Partnerships and Similar Entities which presumes that control is held by the general partner (and managing member equivalents in limited liability companies). Limited partners' substantive participation rights may overcome this presumption of control. We account for joint ventures where it is deemed that we do not have control through the equity method of accounting while entities we control are consolidated in KW Group's financial statements.
	Capital Commitments
	As of September 30, 2014, Kennedy Wilson has unfulfilled capital commitments totaling $34.5 million to five of its joint ventures. We may be called upon to contribute additional capital to joint ventures in satisfaction of such capital commitment obligations.
	Guarantees
	Kennedy Wilson has certain guarantees associated with loans secured by consolidated assets or assets held directly or in various joint ventures. As of September 30, 2014, the maximum potential amount of future payments (undiscounted) Kennedy Wilson could be required to make under the guarantees was approximately $54.9 million which is approximately 1% of investment level debt of Kennedy Wilson and its equity partners. The guarantees expire through 2021, 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 sale proceeds from the property. Based on our evaluation of guarantees under FASB ASC Subtopic 460-10 Estimated Fair Value of Guarantees, the estimated fair value of guarantees made as of September 30, 2014 and December 31, 2013 was immaterial.
	Investments in loan pool participation
	As of September 30, 2014 and December 31, 2013, KW Group's investment in loan pool participations totaled $57.5 million and $34.7 million, respectively.
	The following table represents the demographics of KW Group's investment in the loan pools including the initial unpaid principal balance ("UPB") and the UPB as of September 30, 2014.
	(Dollars in millions)				Kennedy Wilson Ownership		Unpaid Principal Balance							Kennedy Wilson Initial Equity Invested				Investment Balance at September 30, 2014			Expected Accretion Over Total Estimated Collection Period
	Acquisition Date		Location				Initial(1)				September 30, 2014(1)													Accreted to Date
	February 2010(2)		Western U.S.		15.00%		$	342.4			$	—		$	11.2			$	0.5		$	4.5		$	4.6
	Apr-12		Western U.S.		75.00%		43.4				2.8			30.9				2.4			4.3			4
Aug-12		Ireland		10.00%		458				324.3			7				8.5			1.8			1.3
Dec-12		United Kingdom		5.00%		631.2				104.9			19.3				2.8			2.2			2
Apr-13		United Kingdom		10.00%		189.2				105.8			13				5.8			5.1			1.7
Aug-13		United Kingdom		20.00%		138.7				138.7			7.5				8.5			4.7			1.6
May 2014(3)		United Kingdom		4.40%		105.8				105.8			30.3				29			2.3			0.6
Total						$	1,908.70			$	782.3		$	119.2			$	57.5		$	24.9		$	15.8
(1) Estimated foreign exchange rate is £0.62=1 USD and €0.79 =1 USD as of September 30, 2014.
(2) Equity invested represents guarantee claims against note holders in loan pool.
(3) This loan portfolio was directly acquired and held by KWE. Kennedy Wilson owns approximately 13.3% of the total issued share capital of KWE.
The following table presents the income from unconsolidated investments for loan pools and foreign currency gain and (loss) recognized by KW Group during the three and nine months ended September 30, 2014 and 2013 for the loan pools that were outstanding:
	Three Months Ended September 30,								Nine Months Ended September 30,
(Dollars in millions)	2014				2013				2014			2013
Income from unconsolidated investments - loan pools	$	2.3			$	3.7			$	7		$	9.1
Unrealized foreign currency translation (loss) gain	(2.9		)		2.1				(2.5		)	(2.9		)
Total	$	(0.6	)		$	5.8			$	4.5		$	6.2

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
FAIR VALUE MEASUREMENTS	'
	FAIR VALUE MEASUREMENTS
	The following table presents fair value measurements (including items that are required to be measured at fair value and items for which the fair value option has been elected) as of September 30, 2014:
	(Dollars in millions)	Level 1				Level 2				Level 3				Total
	Marketable securities	$	13.6			$	—			$	—			$	13.6
	Unconsolidated investments	—				—				90.4				90.4
	Currency forward contract	—				22.7				—				22.7
	Currency option contract	—				2.6				—				2.6
	Total	$	13.6			$	25.3			$	90.4			$	129.3
	The following table presents fair value measurements (including items that are required to be measured at fair value and items for which the fair value option has been elected) as of December 31, 2013:
	(Dollars in millions)	Level 1				Level 2				Level 3				Total
	Marketable securities	$	4			$	—			$	—			$	4
	Unconsolidated investments	—				—				81.1				81.1
	Currency forward contract	—				(9.6		)		—				(9.6		)
	Total	$	4			$	(9.6	)		$	81.1			$	75.5
	Marketable Securities
	Marketable securities include Kennedy Wilson's investment in publicly traded equity securities. The amount above excludes Kennedy Wilson's 13.3 million shares in KWE as the investment is eliminated due to the consolidation of KWE's results in KW Group's financial statements. Based on the September 30, 2014 share price, Kennedy Wilson's investment in KWE had a market value of $234.0 million.
	Fair Value and Fair Value Option - Unconsolidated Investments
	We record our investments in KW Property Fund III, L.P. and Kennedy Wilson Real Estate Fund IV, L.P. (the "Funds") based upon the net assets that would be allocated to its interests in the Funds assuming the Funds were to liquidate their investments at fair value as of the reporting date. Kennedy Wilson’s investment balance in the Funds was $27.7 million and $33.5 million at September 30, 2014 and December 31, 2013, respectively, which is included in unconsolidated investments in the accompanying consolidated balance sheets. As of September 30, 2014, Kennedy Wilson had unfunded capital commitments to the Funds in the amount of $4.2 million.
	We elected to use the fair value option ("FV Option") for three unconsolidated investment entities to more accurately reflect the timing of the value created in the underlying investments and report those results in current operations. Kennedy Wilson's investment balance in the FV Option investments was $62.7 million and $47.6 million at September 30, 2014 and December 31, 2013, respectively, which is included in unconsolidated investments in the accompanying balance sheets.
	In estimating fair value of real estate held by the Funds and the three FV Option investments, we consider significant unobservable inputs such as capitalization and discount rates.
	The following table summarizes our investments in unconsolidated investments held at fair value by type:
	(Dollars in millions)	30-Sep-14				31-Dec-13
	Funds	$	27.7			$	33.5
	FV Option	62.7				47.6
	Total	$	90.4			$	81.1
	The following table presents changes in Level 3 investments for the three and nine months ended September 30, 2014 and 2013:
		Three Months Ended September 30,								Nine Months Ended September 30,
	(Dollars in millions)	2014				2013				2014				2013
	Beginning balance	$	78.5			$	74			$	81.1			$	68.4
	Contributions	16.9				1				19.3				6.9
	Distributions	(5.0		)		(0.8		)		(10.0		)		(1.1		)
	Ending balance	$	90.4			$	74.2			$	90.4			$	74.2
	There was no material change in unrealized gains and losses on Level 3 investments during the three and nine months ended September 30, 2014 and 2013 for investments still held as of September 30, 2014.
	Unobservable inputs for real estate
	The table below describes the range of unobservable inputs for real estate assets:
		Estimated Rates Used for
		Capitalization Rates		Discount Rates
	Office	6.00% - 7.50%		7.00% - 9.75%
	Retail	6.00% - 10.00%		9.00% - 12.00%
	Hotel	6.50%		7.50% - 8.00%
	Multifamily	4.40% - 6.75%		4.90% - 9.00%
	Loan	n/a		1.75% - 12.00%
	Land and condominium units	n/a		8.00% - 12.00%
	In valuing real estate, related assets and indebtedness, we consider significant inputs such as the term of the debt, value of collateral, market loan-to-value ratios, market interest rates and spreads, and credit quality of investment entities. The credit spreads used for these types of investments range from 0.76% to 12.00%.
	The accuracy of estimating fair value for investments utilizing unobservable inputs cannot be determined with precision and cannot be substantiated by comparison to quoted prices in active markets. As such, estimated fair value may not be realized in a current sale or immediate settlement of the asset or liability. Additionally, there are inherent uncertainties in any fair value measurement technique, and changes in the underlying assumptions used, including cap rates, discount rates, liquidity risks, and estimates of future cash flows, could significantly affect the fair value measurement amounts.
	Currency forward and option contracts
	KW Group have currency forward and option contracts to manage their exposure to currency fluctuations between its functional currency (U.S. dollars) and the functional currency (euros, GBP, and JPY) of certain of their wholly-owned and consolidated subsidiaries. To accomplish this objective, KW Group hedged these exposures by entering into currency forward and option contracts to partially hedge KW Group's exposure to its net investment in certain foreign operations caused by currency fluctuations. The currency forward and option contracts are valued based on the difference between the contract rate and the forward rate at maturity of the foreign currency applied to the notional value in that foreign currency discounted at a market rate for similar risks. Although we have determined that the majority of the inputs used to value its derivative fall within Level 2 of the fair value hierarchy, the counterparty risk adjustments associated with the derivative utilize Level 3 inputs. However, as of September 30, 2014, KW Group assessed the significance of the impact of the counterparty valuation adjustments on the overall valuation of its derivative positions and determined that the counterparty valuation adjustments are not significant to the overall valuation of its derivative. As a result, we have determined that our derivative valuation in its entirety be classified in Level 2 of the fair value hierarchy.
	Changes in fair value are recorded in other comprehensive income in the accompanying consolidated statements of comprehensive income (loss) as the portion of the currency forward and option contracts used to hedge currency exposure of its certain consolidated subsidiaries qualifies as a net investment hedge under FASB ASC Topic 815. The fair value of the derivative instruments held as of September 30, 2014 are reported in other assets for hedge assets and included in accrued expenses and other liabilities for hedge liabilities on the balance sheet. See note 12 for a complete discussion on other comprehensive income including currency forward and option contracts and foreign currency translations.
	The table below details the currency forward and option contracts KW Group had as of September 30, 2014:
	(Dollars in millions)											Change in Unrealized Gains (Losses)
	Currency Hedged	Type	Underlying Currency	Notional Amount	Trade Date	Settlement/Expiration Date	Forward Rate/Strike Price	Fair Value				Three Months Ended September 30, 2014				Nine Months Ended September 30, 2014
	EUR	Forward	USD	€ 93.50	5/31/2012 - 6/25/2014	6/4/2015 - 6/27/2019	1.240 - 1.4471	$	3.7			$	9			$	9.1
	GBP	Forward	USD	£95.5	2/13/2014 - 8/27/2014	8/13/2015 - 2/27/2019	1.6356 - 1.6491	1.6				4.4				1.6
	EUR(1)	Forward	GBP	€ 185.00	6/18/2014 - 8/26/2014	8/27/2015 - 8/28/2019	0.8021 - 0.8621	4.7				6				4.8
	Yen(2)	Forward	USD	¥7,500.0	2/6/13	2/8/16	91.645	12.7				8.7				8.7
	Yen(2)(3)	Option	USD	¥10,953.0	9/18/14	3/27/2015 - 6/26/2015	108.45 -110.62	2.6				0.4				0.4
	Total(4)							$	25.3			$	28.5			$	24.6
	(1) Hedge is held by KWE on its wholly-owned subsidiaries.
	(2) Hedge is held by KWR on its wholly-owned subsidiaries.
	(3) For the three and nine months ended September 30, 2014, $0.1 million recognized through results of operations due to portion of hedge not designated as a net investment hedge.
	(4) Hedges are presented gross in the consolidated balance sheet. Hedge assets are included in other assets and hedge liabilities are included in other liabilities.
	In order to manage currency fluctuations between KWR's functional currency (U.S. dollar) and the functional currency of KWR's wholly owned subsidiaries (Japanese yen), KWR entered into forward and option foreign currency contracts to hedge a portion of its currency risk. Due to the consolidation of KWR, the hedge asset relating to the forward and option foreign currency contracts was consolidated in KW Group's financial statements at fair value.
	In order to manage currency fluctuations between KWE's functional currency (GBP) and the functional currency of certain KWE's wholly owned subsidiaries (Euro), KWE entered into forward foreign currency contracts to hedge a portion of its currency risk. Due to the consolidation of KWE, the hedge asset relating to the forward foreign currency contracts was consolidated at fair value.
Fair value of financial instruments
The carrying amounts of cash and cash equivalents, accounts receivable including related party receivables, accounts payable, accrued expenses and other liabilities, accrued salaries and benefits, and deferred and accrued income taxes approximate fair value due to their short-term maturities. The carrying value of loans (excluding related party loans as they are presumed not to be an arm’s length transaction) approximates fair value as the terms are similar to loans with similar characteristics available in the market.
We account for our debt liabilities at face value plus net unamortized debt premiums and any fair value adjustments as part of business combinations. The fair value as of September 30, 2014 and December 31, 2013 for the senior notes payable, investment debt and junior subordinated debentures were estimated to be approximately $2,794.5 million and $878.2 million, respectively, based on a comparison of the yield that would be required in a current transaction, taking into consideration the risk of the underlying collateral and our credit risk to the current yield of a similar security, compared to their carrying value of $2,755.7 million and $850.8 million at September 30, 2014 and December 31, 2013, respectively.

Other_Assets

Other Assets	9 Months Ended
	Sep. 30, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]	'
OTHER ASSETS	'
	OTHER ASSETS
	Other assets consist of the following:
	(Dollars in millions)	September 30, 2014		31-Dec-13
	Above-market leases, net of accumulated amortization of $4.0 million at September 30, 2014	78.9		—
	Deposits and other, net of accumulated amortization of $1.7 million and	22.6		13
	$1.2 million at September 30, 2014 and December 31, 2013, respectively
	Loan fees, net of accumulated amortization of $7.9 million and $4.5 million at September 30, 2014 and December 31, 2013, respectively	33.9		14.1
	Hedge Assets	25.3		—
	Goodwill	23.9		23.9
	Office furniture and equipment net of accumulated depreciation of $4.4 million and $2.2 million at September 30, 2014 and December 31, 2013, respectively	21.4		10.4
	Marketable securities(1)	13.6		4
	Prepaid expenses	12.7		7.6
	Other Assets	$	232.3	$	73
	(1) The amount above excludes Kennedy Wilson's 13.3 million shares in KWE as the investment is eliminated due to the consolidation of KWE's results. Based on the closing price of KWE shares on September 30, 2014, the fair value of Kennedy Wilson's investment in KWE is $234.0 million.

Investment_Debt

Investment Debt	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
INVESTMENT DEBT	'
	INVESTMENT DEBT
	Investment debt at September 30, 2014 and December 31, 2013 consists of the following:
	(Dollars in millions)			Carrying Amount of Investment Debt as of (1)
	Types of Property Pledged as Collateral	Region		September 30,		December 31,
				2014		2013
	Multifamily (1)	Western U.S.		$	449.1	$	261
	Commercial	Western U.S.		133.6		110.4
	Hotels	Western U.S		36.4		28
	Multifamily (1)	Japan		262.4		—
	Commercial	Japan		2.4		2.4
	Commercial (1)	Ireland		320.5		—
	Multifamily (1)(3)	Ireland		173.3		—
	Hotels(1)	Ireland		76.1		—
	Commercial (1)(4)	United Kingdom		596		—
	Investment debt(2)			$	2,049.80	$	401.8
	(1) The investment debt balances include the unamortized debt premiums. Debt premiums represent the excess of the fair value of debt over the principal value of debt assumed in various acquisitions and are amortized into interest expense over the remaining term of the related debt in a manner that approximates the effective interest method. The unamortized loan premium as of September 30, 2014 and December 31, 2013 was $21.3 million and $5.3 million, respectively.
	(2) The investment debt had a weighted average interest rate of 3.29% and 4.13% per annum at September 30, 2014 and December 31, 2013. As of September 30, 2014, 54% of our property level debt is fixed rate, 32% is floating rate with interest caps and 14% is floating rate without interest caps. As of December 31, 2013, 86% of our property level debt is fixed rate, 7% is floating rate with interest caps and 7% is floating rate without interest caps.
	(3) Includes $60.2 million of investment debt on properties that were directly acquired and held by KWE. Kennedy Wilson owns approximately 13.3% of the total issued share capital of KWE.
	(4) Includes $757.5 million of investment debt on properties that were directly acquired and held by KWE. Kennedy Wilson owns approximately 13.3% of the total issued share capital of KWE.
	During the nine months ended September 30, 2014, 19 mortgage loans were consolidated, 12 acquisitions were partially financed with mortgages, and two existing investments were partially financed with mortgages. See note 4 for more detail on the acquisitions and the investment debt associated with them.
	The aggregate maturities of investment debt subsequent to September 30, 2014 are as follows:
	(Dollars in millions)
	2014	$	7.4
	2015	124.1
	2016	60.8
	2017	206.1
	2018	330.3
	Thereafter	1,299.80
		2,028.50
	Debt premium	21.3
		$	2,049.80

Senior_Notes

Senior Notes	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
SENIOR NOTES	'
	SENIOR NOTES
				September 30, 2014							December 31, 2013
	(Dollars in millions)					Unamortized							Unamortized
		Interest Rate	Maturity Date	Face Value		Net Premium/(Discount)			Carrying Value		Face Value		Net Premium/(Discount)		Carrying Value
	2042 Notes	7.75%	12/1/42	$	55	$	—		$	55	$	55	$	—	$	55
	2024 Notes	5.88%	4/1/24	300		(2.7		)	297.3		—		—		—
	2019 Notes	8.75%	4/1/19	350		3.6			353.6		350		4		354
	Senior Notes			$	705	$	0.9		$	705.9	$	405	$	4	$	409
	In March 2014, Kennedy Wilson completed a public offering of $300.0 million aggregate principal amount of 5.875% Senior Notes, due 2024. The 2024 notes were issued and sold at a public offering price of 99.068% of their principal amount by Kennedy-Wilson, Inc. (the “Issuer”), a wholly owned subsidiary of Kennedy Wilson.
	The indentures governing the 2019 Notes, 2024 Notes, and 2042 Notes contain various restrictive covenants, including, among others, limitations on our ability and the ability of certain of our subsidiaries to incur or guarantee additional indebtedness, to make restricted payments, pay dividends or make any other distributions from restricted subsidiaries, redeem or repurchase capital stock, sell assets or subsidiary stock, engage in transactions with affiliates, create or permit liens on assets, enter into sale/leaseback transactions, and enter into consolidations or mergers. The indentures limit the Issuer's ability and the ability of its restricted subsidiaries to incur additional indebtedness if, on the date of such incurrence and after giving effect to the new indebtedness, the maximum balance sheet leverage ratio (as defined in the indenture) is greater than 1.50 to 1.00. This ratio is measured at the time of incurrence of additional indebtedness. As of September 30, 2014, the balance sheet leverage ratio was 0.74 to 1.00. See Note 16 for the guarantor and non-guarantor financial statements.

Line_of_Credit

Line of Credit	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
LINE OF CREDIT	'
	LINE OF CREDIT
	KWH Facility
	Kennedy-Wilson, Inc. has an unsecured revolving credit facility ("KWH Facility") with U.S. Bank and East-West Bank and Bank of Ireland that bears interest at a rate equal to LIBOR plus 2.75% and has a maturity date of October 1, 2016. In July 2014 Kennedy-Wilson, Inc. increased its unsecured corporate line of credit facility from $140.0 million to $300.0 million. The increase was driven by the admission of Bank of America, N.A., Deutsche Bank AG New York Branch and J.P. Morgan Chase Bank, N.A. to the existing lender syndicate and an increased commitment from The Governor and Company of the Bank of Ireland.
	The revolving loan agreement that governs the unsecured credit facility was updated due to the increase in the facility. The updated facility requires Kennedy-Wilson, Inc. to maintain (i) a minimum rent, adjusted fixed charge coverage ratio (as defined in the revolving loan agreement) of not less than 1.50 to 1.00, measured on a four quarter rolling average basis and (ii) maximum balance sheet leverage (as defined in the revolving loan agreement) of not greater than 1.50 to 1.00, measured at the end of each calendar quarter; (iii) an effective tangible net worth (as defined in the revolving loan agreement) equal to or greater than $500.0 million plus 50% of any equity offerings after March 31, 2014, measured at the end of each calendar quarter; and (iv) unrestricted cash, cash equivalents and publicly traded marketable securities in the aggregate amount of at least $40.0 million.
	As of September 30, 2014, Kennedy-Wilson, Inc.'s adjusted fixed charge coverage ratio was 3.54 to 1.00, its balance sheet leverage ratio was 0.79 to 1.00, and its effective tangible net worth and its unrestricted cash, cash equivalents and publicly traded marketable securities were $897.6 million and $800.6 million, respectively, and Kennedy-Wilson, Inc. was in compliance with these covenants. The revolving loan agreement also provides that any subsidiary guarantors under our 2019 Notes and 2042 Notes must provide guarantees of the loans drawn on our unsecured revolving credit facility.  See Note 9 for a discussion of our senior notes.
	During the nine months ended September 30, 2014, the Company drew and repaid $90.0 million on its unsecured credit facility to fund acquisitions. The maximum amount drawn on the unsecured credit facility at any one point during the nine months ended September 30, 2014 was $90.0 million. As of September 30, 2014, the unsecured credit facility was undrawn and $300.0 million was still available.
	KWE Facility
	In August 2014, KWE entered into a three year unsecured floating rate revolving debt facility ("KWE Facility") of approximately $365 million (£225 million) with a syndicate of banks. The facility was undrawn as of September 30, 2014. The KWE Facility requires KWE to maintain (i) a maximum consolidated leverage ratio (as defined in the revolving loan agreement) not to exceed 60%; (ii) minimum net asset value not to fall below IFRS NAV (as defined in the KWE Facility agreement) of £744.4 million plus 75% of equity proceeds received by subsidiaries; (iii) a minimum fixed charge coverage ratio where consolidated EBITDA to consolidated fixed charges not to be less than 1.5 to 1.0 for the last four quarters; (iv) minimum unsecured interest where property level net operating income ("NOI") and loan asset NOI to interest expense on unsecured debtors not to be less than 1.9 to 1.0 for the last four quarters; and (v) a maximum secured recourse indebtedness for consolidated secured recourse debt to not exceed 2.5% of total asset value at any time.

Junior_Subordinated_Debentures

Junior Subordinated Debentures	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
JUNIOR SUBORDINATED DEBENTURES	'
	JUNIOR SUBORDINATED DEBENTURES
	In September 2014, Kennedy Wilson extinguished its junior subordinated debt with a face value of $40.0 million for $41.5 million which resulted in a $1.5 million loss on early extinguishment of corporate debt.

Stockholders_Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2014
Equity [Abstract]	'
STOCKHOLDERS' EQUITY	'
	STOCKHOLDERS' EQUITY
	Common Stock
	In January 2014, Kennedy Wilson completed an offering of 9.2 million shares of its common stock, which raised $190.6 million of net proceeds.
	Dividend Distributions
	During the following periods, Kennedy Wilson declared and paid the following cash distributions on its common and preferred stock:
		Nine Months Ended September 30, 2014						Nine Months Ended September 30, 2013
	(Dollars in millions)	Declared			Paid			Declared			Paid
	Preferred Stock
	Series A (1)	$	4.5		$	4.5		$	4.5		$	4.5
	Series B (2)	1.6			1.6			1.6			1.6
	Total Preferred Stock	6.1			6.1			6.1			6.1
	Common Stock (3)	25			22.3			16			10.2
	Total (4)	$	31.1		$	28.4		$	22.1		$	16.3
	(1) 6.00% Series A, 100,000 shares issued and outstanding as of September 30, 2014 and 2013, mandatorily convertible on May 19, 2015, or earlier at the option of the holders thereof.
	(2) 6.45% Series B, 32,550 shares issued and outstanding as of September 30, 2014 and 2013, mandatorily convertible on November 3, 2018, or earlier at the option of the holders thereof, or, in certain circumstances, at our election on or after May 3, 2017.
	(3) $0.0001 par value per share, 200,000,000 and 125,000,000 shares authorized as of September 30, 2014 and 2013, respectively.
	(4) Common stock dividends were declared at the end of each quarter and paid in the following quarter. The amount declared and not paid is accrued on the consolidated balance sheet.
	Stock-based Compensation
	During the three months ended September 30, 2014 and 2013, KW Group recognized $5.3 million and $2.0 million of compensation expense related to the vesting of restricted stock grants. During the nine months ended September 30, 2014 and 2013, KW Group recognized $8.7 million and $5.4 million of compensation expense related to the vesting of restricted stock grants. The increase for the three and nine months ended September 30, 2014 is due to 3,140,000 shares issued under Kennedy Wilson's Amended and Restated 2009 Equity Participation Plan during the quarter ended September 30, 2014.
	Accumulated Other Comprehensive Income
	The following table summarizes the changes in each component of accumulated other comprehensive income (loss), net of taxes:
		Foreign Currency Translation			Forward Contract Foreign Currency			Marketable Securities			Total Accumulated Other Comprehensive Income
	(Dollars in millions)
	Balance at December 31, 2013	$	4.3		$	4.9		$	—		$	9.2
	Unrealized gains (losses), arising during the period	(107.5		)	24.3			(1.9		)	(85.1		)
	Amounts reclassified out of AOCI during the period(1)	(0.3		)	(6.8		)	—			(7.1		)
	Taxes on unrealized gains (losses), arising during the period	40.4			(7.8		)	0.8			33.4
	Noncontrolling interest	36.4			—			—			36.4
	Balance at September 30, 2014	$	(26.7	)	$	14.6		$	(1.1	)	$	(13.2	)
	(1) Amounts reclassified out of accumulated other comprehensive income relate to the consolidation of investments previously accounted for under the equity method. Pursuant to FASB ASC 805-10, Business Combinations, these amounts are included in the calculation of gain or loss as of the acquisition date. Please refer to Note 4 - Real Estate for further discussion on consolidated acquisitions.
	The functional currencies for our interests in foreign operations include the euro, the British pound sterling, and the Japanese yen. The related amounts on KW Group's balance sheets are translated into U.S. dollars at the exchange rates at the respective financial statement date, while amounts on its statements of operations are translated at the average exchange rates during the respective period. The increase in the unrealized gains on foreign currency translation is a result of the strengthening of the U.S. dollar against the euro, the British pound and the Japanese yen during the nine months ended September 30, 2014.
	In order to manage currency fluctuations, KW Group entered into forward and option foreign currency contracts to hedge a portion of its Japanese yen-based investments. KW Group also has currency forward contracts to manage its exposure to currency fluctuations between its functional currency (U.S. dollars) and the functional currency (euros and GBP) of certain of its wholly-owned and consolidated subsidiaries. See note 6 for a more detailed discussion of KW Group's forward and option currency contracts.
	Noncontrolling Interests
	Noncontrolling interests consist of the ownership interests of noncontrolling shareholders in consolidated subsidiaries,
	and are presented separately on KW Group's balance sheet. As of September 30, 2014 and December 31, 2013 KW Group had noncontrolling interest of $1.7 billion and $50.6 million, respectively.
	Kennedy Wilson currently owns approximately 13.3% of KWE’s total issued share capital as of September 30, 2014.  Due to the terms provided in the investment management agreement between KWE and a wholly-owned subsidiary of Kennedy Wilson, the results of KWE are consolidated in KW Group's financial statements.  See Note 1 for additional details.  Due to KWE's IPO in February 2014, KW Group recorded a $1.4 billion increase to non-controlling interest, net of issuance costs, relating to the equity of the noncontrolling shareholders of KWE.  Kennedy Wilson’s share of the issuance costs was $6.5 million.
	As further discussed in Note 4, the assets and liabilities of seven operating properties were consolidated in KW Group’s financial statements and an increase of $291.8 million was recorded to noncontrolling interests relating to the equity of the noncontrolling shareholders of these properties.  See note 4.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
EARNINGS PER SHARE	'
	EARNINGS PER SHARE
	Under FASB ASC Topic 260-10-45 Earnings Per Share, the Company uses the two-class method to calculate earnings per share. Basic earnings per share is calculated based on dividends declared (“distributed earnings”) and the rights of common shares and participating securities in any undistributed earnings, which represents net income remaining after deduction of dividends declared during the period. Participating securities, which include unvested restricted stock, are included in the computation of earnings per share pursuant to the two-class method. The undistributed earnings are allocated to all outstanding common shares and participating securities based on the relative percentage of each security to the total number of outstanding securities. Basic earnings per common share and participating securities represent the summation of the distributed and undistributed earnings per common share and participating security divided by the total weighted average number of common shares outstanding and the total weighted average number of participating securities outstanding during the respective periods. We only present the earnings per share attributable to the common shareholders.
	Net losses, after deducting the dividends to participating securities, are allocated in full to the common shares since the participating security holders do not have an obligation to share in the losses, based on the contractual rights and obligations of the participating securities. Because KW Group incurred losses for the three months ended September 30, 2014 and the three and nine months ended September 30, 2013, all potentially dilutive instruments are anti-dilutive and have been excluded from our computation of weighted average dilutive shares outstanding for that period. The following is a summary of the elements used in calculating basic and diluted income (loss) per share for the three and nine months ended September 30, 2014 and 2013:
		Three Months Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions, except share and per share amounts)	2014			2013			2014			2013
	Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	(2.2	)	$	(4.1	)	$	44.6		$	(10.2	)
	Net income and dividends allocated to participating securities	(0.5		)	—			(2.6		)	—
	Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders, net of allocation to participating securities	(2.7		)	(4.1		)	42			(10.2		)
	Dividends declared on common shares	(8.1		)	(15.2		)	(24.1		)	(5.5		)
	Undistributed (losses) earnings attributable to Kennedy-Wilson Holdings, Inc. common shareholders, net of allocation to participating securities	$	(10.8	)	$	(19.3	)	$	17.9		$	(15.7	)
	Distributed earnings per share	$	0.09		$	0.07		$	0.27		$	0.21
	Undistributed (losses) earnings per share	(0.12		)	(0.13		)	0.2			(0.36		)
	(Loss) income per basic	(0.03		)	(0.06		)	0.47			(0.15		)
	(Loss) income per diluted	$	(0.03	)	$	(0.06	)	$	0.47		$	(0.15	)
	Weighted average shares outstanding for basic	89,267,838			72,643,000			88,854,215			68,486,876
	Weighted average shares outstanding for diluted(1)	89,267,838			72,643,000			90,169,008			68,486,876
	Dividends declared per common share	$	0.09		$	0.07		$	0.27		$	0.21
	(1) For the three months ended September 30, 2014, a total of 12,993,531 potentially dilutive securities have not been included in the diluted weighted average shares as they are anti-dilutive. For the three and nine months ended September 30, 2013, a total of 19,315,303 and 19,620,824 potentially dilutive securities have not been included in the diluted weighted average shares as they are anti-dilutive. Potentially anti-dilutive securities include preferred stock, warrants, and unvested restricted stock grants.

Segment_Information

Segment Information	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
SEGMENT INFORMATION	'
	SEGMENT INFORMATION
	Kennedy Wilson's business is defined by two core segments: KW Investments and KW Services. KW Investments invests in multifamily, commercial, residential and hotel properties as well as loans secured by real estate. KW Services provides a full array of real estate-related services to investors and lenders, with a strong focus on financial institution-based clients and publicly traded companies. Kennedy Wilson’s segment disclosure with respect to the determination of segment profit or loss and segment assets is based on these services and investments.
	There have been no changes in the basis of segmentation or in the basis of measurement of segment profit or loss since the December 31, 2013 financial statements.
	KW INVESTMENTS—Kennedy Wilson invests its capital in real estate assets and loans secured by real estate either on its own or with equity partners through joint ventures, separate accounts, and commingled funds. For investments with equity partners we are typically the general partner or investment manager in these investments with a promoted interest in the profits of our investments beyond our ownership percentage. Kennedy Wilson has an average ownership interest across all investments of approximately 45%. Our equity partners include publicly traded companies, financial institutions, foundations, endowments, high net worth individuals and other institutional investors.
	KW SERVICES—KW Services offers a comprehensive line of real estate services for the full lifecycle of real estate ownership to clients that include publicly traded companies, financial institutions, institutional investors, insurance companies, developers, builders and government agencies. KW Services has four main lines of business: investment management, property services, research and auction and conventional sales. These four business lines generate revenue for us through fees and commissions. Related party fee revenue primarily consists of fees earned on investments in which entities in the KW Group also have an ownership interest.
	We manage over 70.2 million square feet of properties for institutional clients and individual investors in the United States, Europe, and Japan, which includes assets we have ownership in and third party assets. With 25 offices throughout the United States, the United Kingdom, Ireland, Spain, Jersey and Japan, we have the capabilities and resources to provide property services to real estate owners as well as the experience, as a real estate investor, to understand client concerns. The managers of KW Services have an extensive track record in their respective lines of business and the real estate community as a whole. Their knowledge and relationships is an excellent driver of business through the services business as well as on the investment front.
	Additionally, KW Services plays a critical role in supporting the company's investment strategy by providing local market intelligence and real-time data for evaluating investments, generating proprietary transaction flow and creating value through efficient implementation of asset management or repositioning strategies.
	The following tables summarize income activity by segment and corporate for the three and nine months ended September 30, 2014 and 2013 and balance sheet data as of September 30, 2014 and December 31, 2013:
		Three Months Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions)	2014			2013			2014			2013
	Investments
	Rental and hotel	$	93.5		$	10.5		$	161.3		27.3
	Sale of real estate	1.6			1.6			19			10.1
	Loan and other	5.7			0.5			11.7			1.4
	Total revenue	100.8			12.6			192			38.8
	Depreciation and amortization	(34.7		)	(4.5		)	(67.3		)	(12.0		)
	Operating expenses	(55.2		)	(13.7		)	(130.2		)	(45.0		)
	Income from unconsolidated investments	11.4			13.2			43.1			30.1
	Operating income	22.3			7.6			37.6			11.9
	Acquisition-related gains	28.9			1.6			199.2			11.1
	Acquisition-related expenses	(5.3		)	—			(16.9		)	(0.5		)
	Interest expense - investment	(13.8		)	(2.8		)	(30.2		)	(7.4		)
	Other	(2.1		)	1			0.8			0.3
	Net income	30			7.4			190.5			15.4
	Net (income) loss attributable to the noncontrolling interests	0.1			0.7			(62.6		)	2.6
	Net income attributable to Kennedy-Wilson Holdings, Inc common shareholders	$	30.1		$	8.1		$	127.9		$	18
		Three Months Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions)	2014			2013			2014			2013
	Services
	Investment management, property services and research fees (includes $8.3, $15.7, $48.9, and $37.8 of related party fees)	$	12.9		$	20.9		$	65		$	54
	Total revenue	12.9			20.9			65			54
	Operating expenses	(14.5		)	(13.3		)	(40.4		)	(31.5		)
	Income from unconsolidated investments	0.7			—			2.8			—
	Operating (loss) income	(0.9		)	7.6			27.4			22.5
	Net loss attributable to the noncontrolling interests	2.7			—			2.7			—
	Net income attributable to Kennedy-Wilson Holdings, Inc common shareholders	$	1.8		$	7.6		$	30.1		$	22.5
		Three Months Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions)	2014			2013			2014			2013
	Corporate
	Operating expenses	$	(9.7	)	$	(5.8	)	$	(25.6	)	$	(16.5	)
	Operating loss	(9.7		)	(5.8		)	(25.6		)	(16.5		)
	Interest expense-corporate	(15.9		)	(10.3		)	(41.1		)	(29.7		)
	Other	—			0.1			—			0.2
	Loss before (provision for) benefit from income taxes	(25.6		)	(16.0		)	(66.7		)	(46.0		)
	(Provision for) benefit from income taxes	(6.6		)	(0.8		)	(40.8		)	1.4
	Net loss	(32.2		)	(16.8		)	(107.5		)	(44.6		)
	Preferred dividends and accretion of preferred stock issuance costs	(2.0		)	(2.0		)	(6.1		)	(6.1		)
	Net loss attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	(34.2	)	$	(18.8	)	$	(113.6	)	$	(50.7	)
		Three Months Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions)	2014			2013			2014			2013
	Consolidated
	Investment management, property services and research fees (includes $8.3, $15.7, $48.9, and $37.8 of related party fees)	$	12.9		$	20.9		$	65		54
	Rental and hotel	93.5			10.5			161.3			27.3
	Sale of real estate	1.6			1.6			19			10.1
	Loans and other	5.7			0.5			11.7			1.4
	Total revenue	113.7			33.5			257			92.8
	Operating expenses	(79.5		)	(32.8		)	(196.2		)	(93.0		)
	Depreciation and amortization	(34.7		)	(4.5		)	(67.3		)	(12.0		)
	Total operating expenses	(114.2		)	(37.3		)	(263.5		)	(105.0		)
	Income from unconsolidated investments	12.1			13.2			45.9			30.1
	Operating income	11.6			9.4			39.4			17.9
	Acquisition-related gain	28.9			1.6			199.2			11.1
	Acquisition-related expenses	(5.3		)	—			(16.9		)	(0.5		)
Interest expense - investment	(13.8		)	(2.8		)	(30.2		)	(7.4		)
Interest expense - corporate	(15.9		)	(10.3		)	(41.1		)	(29.7		)
Other	(1.9		)	0.1			1			0.5
Income (loss) before benefit from income taxes	3.6			(2.0		)	151.4			(8.1		)
(Provision for) benefit from income taxes	(6.6		)	(0.8		)	(40.8		)	1.4
Net income (loss)	(3.0		)	(2.8		)	110.6			(6.7		)
Net (income) loss attributable to the noncontrolling interests	2.8			0.7			(59.9		)	2.6
Preferred dividends and accretion of preferred stock issuance costs	(2.0		)	(2.0		)	(6.1		)	(6.1		)
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	(2.2	)	$	(4.1	)	$	44.6		$	(10.2	)
(Dollars in millions)	30-Sep-14			31-Dec-13
Total Assets
Investments	$	5,381.70		$	1,607.50
Services	49.4			49.3
Corporate	282.2			142
Total assets	$	5,713.30		$	1,798.80

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
INCOME TAXES	'
	INCOME TAXES
	In determining quarterly provisions for income taxes, we use an effective tax rate based on actual year-to-date income and statutory tax rates. The effective tax rate also reflects our assessment of potential exposure for uncertain tax positions.
	The fluctuations between periods in our effective tax rate are mainly due to varying levels of income and amounts attributable to foreign sourced income and noncontrolling interests. Permanent differences that impact our effective rate as compared to the U.S. federal statutory rate of 34% were not materially different in amount for all periods. The difference between the U.S. federal rate of 34% and our effective rate is attributable to the taxation of foreign sourced income being taxed at rates lower than the U.S. domestic rate and income attributable to noncontrolling interests. Our subsidiaries in Ireland, United Kingdom, Spain and Jersey are subject to corporate tax rates of 12.5%, 21.0%, 30.0%, and 0.0% respectively.
	During the nine months ended September 30, 2014, we generated a book loss of $9.6 million related to operations in the United Kingdom, Ireland, Spain and Jersey. A foreign tax benefit of $0.5 million attributable to Kennedy Wilson is included in the consolidated tax provision for income taxes related to the portion of income earned directly by subsidiaries in the United Kingdom and Ireland for the nine months ended ended September 30, 2014. U.S. domestic taxes have not been provided for in the consolidated tax provision on amounts earned directly by these subsidiaries since it is our plan to indefinitely reinvest amounts earned by these subsidiaries in the United Kingdom and Ireland operations. If these subsidiaries' cumulative earnings were repatriated to the United States additional U.S. domestic taxes of $2.8 million attributable to Kennedy Wilson would be incurred. Additionally, approximately $550 million of KW Group's consolidated cash and cash equivalents held by consolidated subsidiaries is held by our subsidiaries in the United Kingdom and Ireland and $21 million is held by our subsidiaries in Japan.

Guarantor_and_NonGuarantor_Fin

Guarantor and Non-Guarantor Financial Statements	9 Months Ended
	Sep. 30, 2014
Guarantor and Nonguarantor Financial Statements [Abstract]	'
GUARANTOR AND NON-GARANTOR FINANCIAL STATEMENTS	'
	GUARANTOR AND NON-GUARANTOR FINANCIAL STATEMENTS
	The following consolidating financial information and condensed consolidating financial information include:
	(1) Condensed consolidating balance sheets as of September 30, 2014 and December 31, 2013; consolidating statements of operations for the three and nine months ended September 30, 2014 and 2013; consolidating statements of comprehensive income for the three and nine months ended September 30, 2014 and 2013; and condensed consolidating statements of cash flows for the three and nine months ended September 30, 2014 and 2013, of (a) Kennedy-Wilson Holdings, Inc., as the parent, (b) Kennedy-Wilson, Inc., as the subsidiary issuer, (c) the guarantor subsidiaries, (d) the non-guarantor subsidiaries and (e) Kennedy-Wilson Holdings, Inc. on a consolidated basis; and
	(2) Elimination entries necessary to consolidate Kennedy-Wilson Holdings, Inc., as the parent, with Kennedy-Wilson, Inc. and its guarantor and non-guarantor subsidiaries.
	Kennedy Wilson owns 100% of all of the guarantor subsidiaries, and, as a result, in accordance with Rule 3-10(d) of Regulation S-X promulgated by the SEC, no separate financial statements are required for these subsidiaries as of and for the three and nine months ended September 30, 2014 or 2013.
	CONDENSED CONSOLIDATING BALANCE SHEET
	AS OF SEPTEMBER 30, 2014
	(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
	Assets
	Cash and cash equivalents	$	—		$	71		$	46.8		$	118.5		$	—		$	236.3
	Cash held by consolidated investments	—			—			—			591.3			—			591.3
	Accounts receivable	—			—			21.2			21			—			42.2
	Loans	—			38.4			15.5			250.6			(37.8		)	266.7
	Real estate and acquired in place lease values, net of accumulated depreciation and amortization	—			—			345.4			3,494.20			—			3,839.60
	Unconsolidated investments	—			9.3			334.5			161.1			—			504.9
	Other assets	—			29.1			44.5			158.7			—			232.3
	Investments in and advances to consolidated subsidiaries	964.9			1,650.80			1,061.30			—			(3,677.0		)	—
	Total assets	$	964.9		$	1,798.60		$	1,869.20		$	4,795.40		$	(3,714.8	)	$	5,713.30
	Liabilities and equity
	Liabilities
	Accounts payable, accrued expenses and other liabilities	$	9.5		$	127.8		$	23.2		$	93.3		$	—		$	253.8
	Senior notes payable	—			705.9			—			—			—			705.9
	Investment debt	—			—			194.8			1,892.80			(37.8		)	2,049.80
	Total liabilities	9.5			833.7			218			1,986.10			(37.8		)	3,009.50
	Equity
	Kennedy-Wilson Holdings, Inc. shareholders' equity	955.4			964.9			1,650.80			1,061.30			(3,677.0		)	955.4
	Noncontrolling interests	—			—			0.4			1,748.00			—			1,748.40
	Total equity	955.4			964.9			1,651.20			2,809.30			(3,677.0		)	2,703.80
	Total liabilities and equity	$	964.9		$	1,798.60		$	1,869.20		$	4,795.40		$	(3,714.8	)	$	5,713.30
	CONDENSED CONSOLIDATING BALANCE SHEET
	AS OF DECEMBER 31, 2013
	(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
	Assets
	Cash and cash equivalents	$	—		$	48.2		$	77.2		$	44.8		$	—		$	170.2
	Cash held by consolidated investments	—			—			—			8			—			8
	Accounts receivable	—			1.1			7			8.5			—			16.6
	Intercompany receivables	—			9			—			—			(9.0		)	—
	Loans receivable	—			59.7			53.7			0.8			(57.4		)	56.8
	Real estate and acquired in place lease values, net of accumulated depreciation	—			—			145.3			542.8			—			688.1
	Unconsolidated investments	—			7.5			598			180.6			—			786.1
	Investments in and advances to consolidated subsidiaries	775.1			1,141.90			326.6			—			(2,243.6		)	—
	Other assets	—			20.9			31.4			20.7			—			73
	Total assets	$	775.1		$	1,288.30		$	1,239.20		$	806.2		$	(2,310.0	)	$	1,798.80
	Liabilities
	Accounts payable, accrued expense and other liabilities	$	6.8		$	64.2		$	22.9		$	35.2		$	—		129.1
	Intercompany payables	—			—			—			9			(9.0		)	—
	Senior notes payable	—			409			—			—			—			409
	Intercompany loans payable	—			—			—			57.4			(57.4		)	—
	Investment debt	—			—			74.4			327.4			—			401.8
	Junior subordinated debentures	—			40			—			—			—			40
	Total liabilities	6.8			513.2			97.3			429			(66.4		)	979.9
	Equity
	Kennedy-Wilson Holdings, Inc. shareholders' equity	768.3			775.1			1,141.90			326.6			(2,243.6		)	768.3
	Noncontrolling interests	—			—			—			50.6			—			50.6
	Total equity	768.3			775.1			1,141.90			377.2			(2,243.6		)	818.9
	Total liabilities and equity	$	775.1		$	1,288.30		$	1,239.20		$	806.2		$	(2,310.0	)	$	1,798.80
	CONSOLIDATING STATEMENT OF OPERATIONS
	FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2014
	(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
	Revenue
	Investment management, property services and research fees	$	—		$	(0.5	)	$	14.1		$	(0.7	)	$	—		$	12.9
	Rental and hotel	—			—			5.6			87.9			—			93.5
	Sale of real estate	—			—			0.1			1.5			—			1.6
Loans and other	—			0.1			(2.8		)	8.4			—			5.7
Total revenue	—			(0.4		)	17			97.1			—			113.7
Operating expenses
Commission and marketing	—			—			1.6			0.4			—			2
Rental and hotel operating	—			—			(5.5		)	43.3			—			37.8
Cost of real estate sold	—			—			—			1.1			—			1.1
Compensation and related	5.3			8.8			10.7			2			—			26.8
General and administrative	—			3.8			7.5			0.5			—			11.8
Depreciation and amortization	—			0.2			3.1			31.4			—			34.7
Total operating expenses	5.3			12.8			17.4			78.7			—			114.2
Income from unconsolidated subsidiaries	—			2.1			4.2			5.8			—			12.1
Income from consolidated subsidiaries	2.3			35.7			30.2			—			(68.2		)	—
Operating income (loss)	(3.0		)	24.6			34			24.2			(68.2		)	11.6
Non-operating income (expense)
Acquisition-related gains	—			—			—			28.9			—			28.9
Acquisition-related expenses	—			—			(0.1		)	(5.2		)	—			(5.3		)
Interest expense-investment	—			—			(3.5		)	(10.3		)	—			(13.8		)
Interest expense-corporate	—			(15.9		)	—			—			—			(15.9		)
Other income / (expense)	—			(0.2		)	—			(1.7		)	—			(1.9		)
Income (loss) before benefit from income taxes	(3.0		)	8.5			30.4			35.9			(68.2		)	3.6
(Provision for) benefit from income taxes	—			(6.1		)	5.1			(5.6		)	—			(6.6		)
Net income (loss)	(3.0		)	2.4			35.5			30.3			(68.2		)	(3.0		)
Net (income) loss attributable to the noncontrolling interests	—			—			—			2.8			—			2.8
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc.	(3.0		)	2.4			35.5			33.1			(68.2		)	(0.2		)
Preferred dividends and accretion of preferred stock issuance costs	(2.0		)	—			—			—			—			(2.0		)
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	(5.0	)	$	2.4		$	35.5		$	33.1		$	(68.2	)	$	(2.2	)
CONSOLIDATING STATEMENT OF OPERATIONS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2014
(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
Revenue
Investment management, property services and research fees	$	—		$	—		$	62.6		$	2.4		$	—		$	65
Rental and hotel	—			—			12			149.3			—			161.3
Sale of real estate	—			—			0.7			18.3			—			19
Loans and other	—			0.2			1.5			10			—			11.7
Total revenue	—			0.2			76.8			180			—			257
Operating expenses
Commission and marketing	—			—			3			0.8			—			3.8
Rental and hotel operating	—			—			(3.1		)	73			—			69.9
Cost of real estate sold	—			—			0.7			13.9			—			14.6
Compensation and related	8.7			39			27			4.9			—			79.6
General and administrative	—			9.4			11.5			7.4			—			28.3
Depreciation and amortization	—			0.7			7.9			58.7			—			67.3
Total operating expenses	8.7			49.1			47			158.7			—			263.5
Income from unconsolidated subsidiaries	—			3.3			35.1			7.5			—			45.9
Income from consolidated subsidiaries	119.3			245.2			183.1			—			(547.6		)	—
Operating income (loss)	110.6			199.6			248			28.8			(547.6		)	39.4
Non-operating income (expense)
Acquisition-related gains	—			(7.0		)	3.7			202.5			—			199.2
Acquisition-related expenses	—			—			(1.7		)	(15.2		)	—			(16.9		)
Interest expense-investment	—			—			(3.5		)	(26.7		)	—			(30.2		)
Interest expense-corporate	—			(41.1		)	—			—			—			(41.1		)
Other income / (expense)	—			—			1.5			(0.5		)	—			1
Income (loss) before benefit from income taxes	110.6			151.5			248			188.9			(547.6		)	151.4
(Provision for) benefit from income taxes	—			(32.2		)	(3.0		)	(5.6		)	—			(40.8		)
Net income (loss)	110.6			119.3			245			183.3			(547.6		)	110.6
Net (income) loss attributable to the noncontrolling interests	—			—			—			(59.9		)	—			(59.9		)
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc.	110.6			119.3			245			123.4			(547.6		)	50.7
Preferred dividends and accretion of preferred stock issuance costs	(6.1		)	—			—			—			—			(6.1		)
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	104.5		$	119.3		$	245		$	123.4		$	(547.6	)	$	44.6
CONSOLIDATING STATEMENT OF OPERATIONS
FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2013
(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
Revenue
Investment management, property services, and research fees	$	—		$	—		$	7.3		$	13.6		$	—		$	20.9
Rental and hotel	—			0.2			1.5			8.8			—			10.5
Sale of real estate	—			—			1.6			—			—			1.6
Loans and other	—			—			0.5			—			—			0.5
Total revenue	—			0.2			10.9			22.4			—			33.5
Operating expenses
Commission and marketing	—			—			0.8			0.2			—			1
Rental and hotel operating	—			—			1			3.2			—			4.2
Cost of real estate sold	—			—			0.9			—			—			0.9
Compensation and related	2			11.5			3.8			3.6			—			20.9
General and administrative	—			2			1.4			2.4			—			5.8
Depreciation and amortization	—			0.1			1.3			3.1						4.5
Total operating expenses	2			13.6			9.2			12.5			—			37.3
Income from unconsolidated investments, net of depreciation and amortization	—			0.3			19.5			(6.6		)	—			13.2
Income from consolidated subsidiaries	(0.7		)	23.6			2.8			—			(25.7		)	—
Operating income (expense)	(2.7		)	10.5			24			3.3			(25.7		)	9.4
Non-operating income (expense)
Acquisition-related gains	—			—			—			1.6			—			1.6
Interest expense-investment	—			—			(0.2		)	(2.6		)				(2.8		)
Interest expense-corporate	—			(10.3		)	—			—			—			(10.3		)
Other income	—			0.1			—			—			—			0.1
(Loss) income before benefit from income taxes	(2.7		)	0.3			23.8			2.3			(25.7		)	(2.0		)
Benefit from (provision for) income taxes	—			(1.1		)	—			0.3			—			(0.8		)
Net (loss) income	(2.7		)	(0.8		)	23.8			2.6			(25.7		)	(2.8		)
Net income attributable to the noncontrolling interests	—			—			(0.1		)	0.8			—			0.7
Preferred dividends and accretion of preferred stock issuance costs	(2.0		)	—			—			—			—			(2.0		)
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	(4.7	)	$	(0.8	)	$	23.7		$	3.4		$	(25.7	)	$	(4.1	)
CONSOLIDATING STATEMENT OF OPERATIONS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2013
(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
Revenue
Investment management, property services, and research fees	$	—		$	0.6		$	21.5		$	31.9		$	—		$	54
Rental and hotel	—			0.2			4.7			22.4			—			27.3
Sale of real estate	—			—			10.1			—			—			10.1
Loans and other	—			—			1.4			—			—			1.4
Total revenue	—			0.8			37.7			54.3			—			92.8
Operating expenses
Commission and marketing	—			0.4			2.2			0.2			—			2.8
Rental and hotel operating	—			—			2.6			9.3			—			11.9
Cost of real estate sold	—			—			7.9			—			—			7.9
Compensation and related	5.5			25.1			10.8			11.4			—			52.8
General and administrative	0.3			6.4			3.5			7.4			—			17.6
Depreciation and amortization	—			0.4			3.6			8			—			12
Total operating expenses	5.8			32.3			30.6			36.3			—			105
Income from unconsolidated investments, net of depreciation and amortization	—			0.3			39.7			(9.9		)	—			30.1
Income from consolidated subsidiaries	(0.8		)	58.3			12.3			—			(69.8		)	—
Operating income (expense)	(6.6		)	27.1			59.1			8.1			(69.8		)	17.9
Non-operating income (expense)
Acquisition-related gains	—			—			—			11.1			—			11.1
Acquisition-related expense	—			—			(0.2		)	(0.3		)	—			(0.5		)
Interest expense-investment	—			—			(0.7		)	(6.7		)	—			(7.4		)
Interest expense-corporate				(29.7		)	—			—			—			(29.7		)
Other income	—			0.4			0.1			—			—			0.5
(Loss) income before benefit from income taxes	(6.6		)	(2.2		)	58.3			12.2			(69.8		)	(8.1		)
Benefit from (provision for) income taxes	—			1.4			—			—			—			1.4
Net (loss) income	(6.6		)	(0.8		)	58.3			12.2			(69.8		)	(6.7		)
Net income attributable to the noncontrolling interests	—			—			(0.1		)	2.7			—			2.6
Preferred dividends and accretion of preferred stock issuance costs	(6.1		)	—			—			—			—			(6.1		)
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	(12.7	)	$	(0.8	)	$	58.2		$	14.9		$	(69.8	)	$	(10.2	)
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2014
(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
Net (loss) income	$	(3.0	)	$	2.4		$	35.5		$	30.3		$	(68.2	)	$	(3.0	)
Other comprehensive income (loss), net of tax:
Unrealized foreign currency translation (loss) gain	(89.0		)	(89.0		)	(21.4		)	(12.6		)	123			(89.0		)
Amounts reclassified out of AOCI during the period	—			—			9.5			(9.5		)	—			—
Loss on marketable securities	(1.1		)	(1.1		)	—			—			1.1			(1.1		)
Unrealized forward contract foreign currency (loss) gain	20.1			20.1			6.5			11.3			(37.9		)	20.1
Total other comprehensive (loss) income for the period	$	(70.0	)	$	(70.0	)	$	(5.4	)	$	(10.8	)	$	86.2		$	(70.0	)
Comprehensive income	$	(73.0	)	$	(67.6	)	$	30.1		$	19.5		$	18		$	(73.0	)
Comprehensive (income) loss attributable to noncontrolling interests	—			—			—			58			—			58
Comprehensive income attributable to Kennedy-Wilson Holdings, Inc.	$	(73.0	)	$	(67.6	)	$	30.1		$	77.5		$	18		$	(15.0	)
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2013
(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
Net (loss) income	$	(2.7	)	$	(0.8	)	$	23.8		$	2.6		$	(25.7	)	$	(2.8	)
Other comprehensive income (loss), net of tax:
Unrealized foreign currency translation gains	8.8			8.8			6.4			2.3			(17.5		)	8.8
Unrealized forward contract foreign currency loss	(3.6		)	(3.6		)	0.1			—			3.5			(3.6		)
Total other comprehensive income for the period	$	5.2		$	5.2		$	6.5		$	2.3		$	(14.0	)	$	5.2
Comprehensive (loss) income	$	2.5		$	4.4		$	30.3		$	4.9		$	(39.7	)	$	2.4
Comprehensive income attributable to noncontrolling interests	—			—			(0.1		)	0.8			—			0.7
Comprehensive (loss) income attributable to Kennedy-Wilson Holdings, Inc.	$	2.5		$	4.4		$	30.2		$	5.7		$	(39.7	)	$	3.1
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2014
(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
Net income (loss)	$	110.6		$	119.3		$	245		$	183.3		$	(547.6	)	$	110.6
Other comprehensive income (loss), net of tax:
Unrealized foreign currency translation (loss) gain	(67.1		)	(67.1		)	2.5			(16.5		)	81.1			(67.1		)
Amounts reclassified out of AOCI during the period	(7.1		)	(7.1		)	1.2			(8.3		)	14.2			(7.1		)
Loss on marketable securities	(1.1		)	(1.1		)	—			—			1.1			(1.1		)
Unrealized forward contract foreign currency (loss) gain	16.5			16.5			5.3			10.1			(31.9		)	16.5
Total other comprehensive (loss) income for the period	$	(58.8	)	$	(58.8	)	$	9		$	(14.7	)	$	64.5		$	(58.8	)
Comprehensive income	$	51.8		$	60.5		$	254		$	168.6		$	(483.1	)	$	51.8
Comprehensive (income) loss attributable to noncontrolling interests	—			—			—			(23.5		)	—			(23.5		)
Comprehensive income attributable to Kennedy-Wilson Holdings, Inc.	$	51.8		$	60.5		$	254		$	145.1		$	(483.1	)	$	28.3
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2013
(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
Net (loss) income	$	(6.6	)	$	(0.8	)	$	58.3		$	12.2		$	(69.8	)	$	(6.7	)
Other comprehensive income (loss), net of tax:
Unrealized foreign currency translation gains	(9.2		)	(9.2		)	(11.6		)	(0.3		)	21.1			(9.2		)
Unrealized forward contract foreign currency loss	2.2			2.2			5.4			—			(7.6		)	2.2
Total other comprehensive income for the period	$	(7.0	)	$	(7.0	)	$	(6.2	)	$	(0.3	)	$	13.5		$	(7.0	)
Comprehensive (loss) income	$	(13.6	)	$	(7.8	)	$	52.1		$	11.9		$	(56.3	)	$	(13.7	)
Comprehensive income attributable to noncontrolling interests	—			—			(0.2		)	2.8			—			2.6
Comprehensive (loss) income attributable to Kennedy-Wilson Holdings, Inc.	$	(13.6	)	$	(7.8	)	$	51.9		$	14.7		$	(56.3	)	$	(11.1	)
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2014
(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Consolidated Total
Net cash provided by (used in) operating activities	$	(0.1	)	$	(25.7	)	$	73.7		$	37.8		$	85.7
Cash flows from investing activities:
Additions to loans	—			—			(5.8		)	(470.6		)	(476.4		)
Collections of loans	—			—			15.1			80.8			95.9
Net proceeds from sale of real estate	—			—			—			16.3			16.3
Purchases of and additions to real estate	—			(0.6		)	(71.6		)	(1,466.0		)	(1,538.2		)
Proceeds from settlement of foreign forward contracts	—			—			—			7.5			7.5
Purchases of foreign currency options	—			—			—			(2.2		)	(2.2		)
Distributions from unconsolidated investments	—			0.3			51.6			47.4			99.3
Contributions to unconsolidated investments	—			(2.0		)	(47.9		)	(89.7		)	(139.6		)
Investment in marketable securities	—			—			(11.5		)	—			(11.5		)
(Investments in) distributions from consolidated subsidiaries, net	(159.3		)	(198.4		)	(65.0		)	422.7			—
Net cash (used in) provided by investing activities	(159.3		)	(200.7		)	(135.1		)	(1,453.8		)	(1,948.9		)
Cash flows from financing activities:
Borrowings under line of credit	—			90			—			—			90
Repayment of line of credit	—			(90.0		)	—			—			(90.0		)
Borrowings under investment debt	—			—			31.5			793.6			825.1
Borrowings under senior notes payable	—			297.2			—			—			297.2
Debt issue costs	—			(7.8		)	(0.6		)	(20.1		)	(28.5		)
Repayment of investment debt	—			(40.0		)	(0.1		)	(32.1		)	(72.2		)
Issuance of common stock	190.6			—			—			—			190.6
Dividends paid	(28.4		)	—			—			—			(28.4		)
Repurchase and retirement of common stock	(2.9		)	—			—			—			(2.9		)
Proceeds from issuance of KWE shares	—			—			—			1,351.10			1,351.10
Restricted cash	—			—			—			(42.6		)	(42.6		)
Acquisition of KWE shares from noncontrolling interest holders	—			—			—			(16.8		)	(16.8		)
Contributions from noncontrolling interests	—			—			—			12.9			12.9
Distributions to noncontrolling interests	—			—			—			(24.3		)	(24.3		)
Net cash provided by financing activities	159.3			249.4			30.8			2,021.70			2,461.20
Effect of currency exchange rate changes on cash and cash equivalents	—			—			—			10.8			10.8
Net change in cash and cash equivalents	(0.1		)	23			(30.6		)	616.5			608.8
Cash and cash equivalents, beginning of year	—			48.2			77.2			52.8			178.2
Cash and cash equivalents, end of period	$	(0.1	)	$	71.2		$	46.6		$	669.3		$	787
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2013
(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Consolidated Total
Net cash (used in) provided by operating activities	$	0.2		$	(62.2	)	$	36.5		$	8.4		$	(17.1	)
Cash flows from investing activities:
Additions to loans	—			(8.2		)	(22.1		)	—			(30.3		)
Collections of loans	—			4.9			38			0.1			43
Net proceeds from sale of real estate	—			—			10.1			0.4			10.5
Purchases of and additions to real estate	—			—			(31.3		)	(84.6		)	(115.9		)
Capitalized Development Costs	—			(1.3		)	—			—			(1.3		)
Proceeds from maturities to short term investments	—			10			—			—			10
Distributions from unconsolidated investments	—			0.4			135.7			7.2			143.3
Contributions to unconsolidated investments	—			(2.3		)	(214.6		)	(97.4		)	(314.3		)
(Investment in) distributions from consolidated subsidiaries, net	(263.2		)	178.7			8.1			76.4			—
Net cash (used in) provided by investing activities	(263.2		)	182.2			(76.1		)	(97.9		)	(255.0		)
Cash flows from financing activities:
Borrowings under line of credit	—			125			—			—			125
Repayment of lines of credit	—			(125.0		)	—			—			(125.0		)
Borrowings under investment debt	—			—			18.7			53.6			72.3
Repayment of investment debt	—			—			—			(1.1		)	(1.1		)
Debt issue costs	—			(1.3		)	(0.1		)	(0.4		)	(1.8		)
Issuance of common stock	276			—			—			—			276
Repurchase of warrants	(1.4		)	—			—			—			(1.4		)
Dividends paid	(16.3		)	—			—			—			(16.3		)
Contributions from noncontrolling interests	—			—			—			0.9			0.9
Intercompany receivables, net	—			(21.9		)	—			21.9			—
Distributions to noncontrolling interests	—			—			—			(0.4		)	(0.4		)
Exercise of warrants	4.7			—			—			—			4.7
Net cash provided by (used in) financing activities	263			(23.2		)	18.6			74.5			332.9
Effect of currency exchange rate changes on cash and cash equivalents	—			0.2			(10.4		)	9.9			(0.3		)
Net change in cash and cash equivalents	—			97			(31.4		)	(5.1		)	60.5
Cash and cash equivalents, beginning of period	—			64.5			38.5			17.9			120.9
Cash and cash equivalents, end of period	$	—		$	161.5		$	7.1		$	12.8		$	181.4

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2014
Subsequent Events [Abstract]	'
SUBSEQUENT EVENTS	'
	SUBSEQUENT EVENTS
	In October 2014, Kennedy Wilson drew $50.0 million on its unsecured credit facility. There is $250.0 million remaining available to be drawn on the credit facility.
	In October 2014, KWE completed a secondary offering of approximately $565 million of ordinary shares. Kennedy Wilson acquired approximately $75 million of KWE’s ordinary shares maintaining its 13.3% ownership in KWE. In total, Kennedy Wilson owns approximately 18.0 million shares of KWE with a cost basis of $297.6 million.
	The Company evaluated subsequent events through the date these financial statements were issued.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies and Adoption of New Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
REVENUE RECOGNITION	'
	REVENUE RECOGNITION—Performance fees or carried interests are allocated to the general partner, special limited partner or asset manager of our real estate funds and loan pool participations based on the cumulative performance of the funds and loan pools and are subject to preferred return thresholds of the limited partners and participants. At the end of each reporting period, we calculate the performance fee that would be due to the general partner, special limited partner or asset manager's interests for a fund or loan pool, pursuant to the fund agreement or participation agreements, as if the fair value of the underlying investments were realized as of such date, irrespective of whether such amounts have been realized. As the fair value of underlying investments varies between reporting periods, it is necessary to make adjustments to amounts recorded as performance fees to reflect either (a) positive performance resulting in an increase in the performance fee allocated to the general partner or asset manager or (b) negative performance that would cause the amount due to us to be less than the amount previously recognized as revenue, resulting in a negative adjustment to performance fees allocated to the general partner or asset manager. A majority of the performance fees are recognized in investment management revenue, and substantially all of the carried interest is recognized in income from unconsolidated investments in our consolidated statements of operations. Total performance fees recognized from inception through September 30, 2014 that may be reversed in future periods if there is negative fund or loan pool performance totaled $7.3 million. Performance fees accrued as of September 30, 2014 and December 31, 2013 were $7.3 million and $6.1 million, respectively, and are included in accounts receivable in the accompanying consolidated balance sheet.
REAL ESTATE ACQUISITIONS	'
	REAL ESTATE ACQUISITIONS—The purchase price of acquired properties is recorded to land, buildings and building improvements and intangible lease value (value of above-market and below-market leases, acquired in-place lease values, and tenant relationships, if any) based on their respective estimated fair values in accordance with ASC Subtopics 805-10 Business Combinations. Acquisition-related costs are expensed as incurred. The ownership of the other interest holders in consolidated subsidiaries is reflected as noncontrolling interests.
	The valuations of real estate are based on management estimates of the real estate assets using income and market approaches. The indebtedness securing the real estate is valued, in part, based on third party valuations and management estimates also using an income approach.
NONCONTROLLING INTERESTS	'
	NONCONTROLLING INTERESTS—Noncontrolling interests are reported within equity as a separate component of Kennedy Wilson's equity in accordance with ASC Subtopic 810-10, Noncontrolling Interests in Consolidated Financial Statements. Revenues, expenses, gains, losses, net income (loss), and other comprehensive income are reported in the consolidated statements of operations at the consolidated amounts and net income (loss) and comprehensive income attributable to noncontrolling interests are separately stated.
FOREIGN CURRENCIES	'
	FOREIGN CURRENCIES—The financial statements of subsidiaries located outside the United States are measured using the local currency as this is their functional currency. The assets and liabilities of these subsidiaries are translated at the rates of exchange at the balance sheet date, and income and expenses are translated at the average monthly rate. The foreign currencies include the euro, the British pound sterling, and the Japanese yen. Cumulative translation adjustments, to the extent not included in cumulative net income, are included in the consolidated statement of equity as a component of accumulated other comprehensive income.
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDING ACTIVITIES	'
	DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES—All derivative instruments are recognized as either assets or liabilities in the balance sheet at their respective fair values. For derivatives designated in hedging relationships, changes in fair value of cash flow hedges or net investment hedges are recognized in accumulated other comprehensive income, to the extent the derivative is effective at offsetting the changes in the item being hedged until the hedged item affects earnings. Changes in fair value for fair value hedges are recognized in earnings.
INCOME TAXES	'
	INCOME TAXES—Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. In accordance with ASC Subtopic 740-10 Accounting for Uncertainty in Income Taxes, the effect of income tax positions is recognized only if those positions are more likely than not to be sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs.
RECENT ACCOUNTING PRONOUNCEMENTS	'
	RECENT ACCOUNTING PRONOUNCEMENTS—On April 10, 2014, the FASB issued ASU 2014-08, which amends the definition of discontinued operations and requires additional disclosures for disposal transactions that do not meet the revised discontinued operations criteria. ASU 2014-08 is required to be adopted for fiscal years beginning after December 15, 2014, with early adoption permitted. Our early adoption of this pronouncement on January 1, 2014 did not have a material impact on KW Group's consolidated financial statements.
	In May 2014, the FASB issued an accounting standard update that will use a five step model to recognize revenue from customer contracts in an effort to increase consistency and comparability throughout global capital markets and across industries. The model will identify the contract, identify any separate performance obligations in the contract, determine the transaction price, allocate the transaction price and recognize revenue when the performance obligation is satisfied. The new standard will replace most existing revenue recognition in GAAP when it becomes effective for the Company on January 1, 2017. We have not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.
	The FASB did not issue any other ASCs during the first nine months of 2014 that we expect to be applicable and have a material impact on our financial position or results of operations.
RECLASSIFICATIONS	'
	RECLASSIFICATIONS—Certain balances included in prior year's financial statements have been reclassified to conform with the current year's presentation.

Loans_Tables

Loans (Tables)	9 Months Ended
	Sep. 30, 2014
Receivables [Abstract]	'
Schedule of Loans	'
	The following table summarizes KW Group's investment in loans at September 30, 2014 and December 31, 2013:
		September 30,		December 31,
	(Dollars in millions)	2014		2013
	Loans	$	266.7	$	52.7
	Loans — related parties	—		4.1
	Total loans	$	266.7	$	56.8

Real_Estate_and_InPlace_Lease_1

Real Estate and In-Place Lease Value (Tables)	9 Months Ended
	Sep. 30, 2014
Real Estate [Abstract]	'
Schedule of Investment in Consolidated Real Estate Properties	'
	The following table summarizes KW Group's investment in consolidated real estate properties at September 30, 2014 and December 31, 2013:
			September 30,				December 31,
	(Dollars in millions)		2014				2013
	Land		$	955.3			$	187.8
	Buildings		2,657.50				484.1
	Building improvements		48.4				12.7
	In-place lease value		267				29.8
			3,928.20				714.4
	Less accumulated depreciation and amortization		(88.6		)		(26.3		)
	Real estate, net		$	3,839.60			$	688.1
Schedule of Business Acquisitions, by Acquisition	'
	The following table summarizes the assets and liabilities assumed as a result of gaining control of these properties and the acquisition-related gains recognized:
	(Dollars in millions)
	Property	Type	Location	Cash			Real estate and acquired in-place lease values			Accounts receivable and other assets			Accounts payable, accrued expenses, and other liabilities			Investment debt			Noncontrolling interests		Acquisition related gain(1)
	Three multifamily properties	Multifamily	Ireland	$	3.6		$	248.5		$	0.9		$	5.4		$	114.3		$	66.6	$	39.3
	Two office properties	Commercial	Ireland	4.3			223.9			7.6			4.9			75.2			77.9		33.5
	Two commercial properties and loans secured by real estate	Commercial & Loans	U.K.	9.6			195			5.6			8.1			100.8			62		11.9
	50 multifamily properties	Multifamily	Japan	21			501.2			14.3			4.6			283.7			146.8		66.7
				$	38.5		$	1,168.60		$	28.4		$	23		$	574		$	353.3	$	151.4
	(1) $63.1 million was allocated to noncontrolling interest expense for the portion the acquisition related gain that relates to our equity partners ownership in the properties.
	During the nine months ended September 30, 2014, KW Group acquired the following properties:
	(Dollars in millions)				At Acquisition(1)
	Date acquired	Type	Description	Location	Land			Building			Intangible assets			Investment debt			KWH Shareholders' Equity
	1/20/14	Commercial (2)	Portfolio of 14 commercial, retail, and industrial properties	United Kingdom	$	28.9		$	47.1		$	41.4		$	—		$	58.7
	2/20/14	Hotel	193 room hotel	Western U.S.	1.3			8.3			—			—			6.9
	2/28/14	Multifamily	24 apartment units, 2 penthouse units, and 1,000 square feet of retail	Ireland	0.6			15.1			0.4			9.6			6.5
	3/28/14	Commercial (3)	26 commercial properties throughout England and Scotland	United Kingdom	54			132			54			—			29.3
	3/31/14	Multifamily(4)	281 completed apartments and a partially completed residential block and 725k square feet of commercial space,	Ireland	32.7			80.9			1.2			78.9			35.9
	4/1/14	Commercial	98k square foot retail center	Western U.S.	2.4			5.8			0.4			6			1.9
	4/30/14	Multifamily	203 unit apartment building	Western U.S.	2.7			24			0.3			13.3			13.3
	6/25/14	Multifamily(3)	81 unit apartment building	Ireland	4.8			15			0.4			—			2.7
	6/26/14	Commercial(3)	13 commercial properties	Ireland	104.9			344.3			52.3			273.1			30.1
	6/27/14	Commercial(3)(5)	21 commercial properties throughout England and Scotland	United Kingdom	106.8			300.7			127			—			70.6
	6/30/14	Multifamily	542 unit apartment building	Western U.S.	38.3			57.5			0.6			77.2			18.6
	7/7/14	Hotel(3)	138 room hotel and golf course	Ireland	6.3			28.6			—			—			4.6
	7/29/14	Multifamily	3 property portfolio with 1,212 units	Western U.S.	21.3			106.2			1.4			86.7			42.2
	8/8/14	Hotel(3)	209 room hotel and two golf courses	United Kingdom	11.9			35.2			—			—			6.3
	8/28/14	Multifamily	118 unit apartment building	Western U.S.	2.1			18.6			0.1			13.5			7.3
	9/5/14	Commercial(3)	130k square foot retail center	Ireland	7			33.3			16.1			—			7.5
					$	426		$	1,252.60		$	295.6		$	558.3		$	342.4
	(1) Excludes acquisition expenses and net other assets
	(2) On February 28, 2014, the Company contributed its 50% interest in this portfolio to KWE as part of the Company's investment in KWE's initial public offering.
	(3) These portfolios of properties were directly acquired and held by KWE. Kennedy Wilson owns approximately 13.3% of the total issued share capital of KWE.
	(4) This asset was sold to KWE on June 24, 2014.
	(5) KWE recognized an acquisition-related gain of $15.5 million on the transaction due to its ability to acquire the underlying real estate at a discount to its fair value. See loans converted to real estate section below.
Business Acquisition, Pro Forma Information	'
	The unaudited pro forma data presented below assumes that the acquisitions during the nine months ended September 30, 2014 occurred as of January 1, 2013.
			Unaudited								Unaudited
			Three Months Ended September 30,								Nine Months Ended September 30,
	(Dollars in millions, except for per share data)		2014				2013				2014				2013
	Pro forma revenues		$	127.6			$	96.6			$	379.3			$	281.8
	Pro forma income from unconsolidated investments		9.8				(0.9		)		35.8				(3.4		)
	Pro forma net income (loss) attributable to Kennedy-Wilson Holdings, Inc. common shareholders (1)		(1.1		)		(12.1		)		(32.6		)		(21.7		)
	Pro forma net income (loss) per share:
	Basic		$	(0.01	)		$	(0.17	)		$	(0.37	)		$	(0.32	)
	Diluted		$	(0.01	)		$	(0.17	)		$	(0.37	)		$	(0.32	)

Unconsolidated_Investments_Tab

Unconsolidated Investments (Tables)	9 Months Ended
	Sep. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]	'
Schedule of Investments in Unconsolidated Joint Ventures	'
	KW Group has unconsolidated investments through real estate related joint ventures and loan pool participations. The following table details its investments in joint ventures and loan pool participations as of September 30, 2014 and December 31, 2013:
			September 30,				December 31,
	(Dollars in millions)		2014				2013
	Investments in joint ventures		$	447.4			$	751.4
	Investments in loan pool participations		57.5				34.7
	Total		$	504.9			$	786.1
Schedule of Joint Ventures by Location and Investment Type	'
	The following table details our investments in joint ventures by investment type and geographic location as of September 30, 2014:
	(Dollars in millions)	Multifamily			Commercial			Loan			Residential		Other			Total
	Western U.S.	$	145.2		$	105.8		$	50.1		$	67.6	$	—		$	368.7
	United Kingdom	—			37			—			—		—			37
	Spain	—			—			—			—		27			27
	Other	0.2			5			—			0.2		9.3			14.7
	Total	$	145.4		$	147.8		$	50.1		$	67.8	$	36.3		$	447.4
	The following table details our investments in joint ventures by investment type and geographic location as of December 31, 2013:
	(Dollars in millions)	Multifamily			Commercial			Loan			Residential		Other			Total
	Western U.S.	$	133.3		$	160.3		$	50.3		$	48.7	$	8		$	400.6
	Japan	68.8			—			—			—		—			68.8
	United Kingdom	—			104.5			6.3			—		—			110.8
	Ireland	48.2			96.1			—			—		—			144.3
	Spain	—			—			—			—		26.9			26.9
	Total	$	250.3		$	360.9		$	56.6		$	48.7	$	34.9		$	751.4
Schedule of New Joint Venture Investments	'
	See the table below for a breakdown of contributions to new joint venture investments for the nine months ended September 30, 2014:
		Multifamily						Commercial					Residential
	(Dollars in millions)	Amount			No. of Properties			Amount			No. of Properties		Amount			No. of Properties			Total		No. of Properties
	Western U.S.	$	4		1			$	—		—		$	17		2			$	21	3
	United Kingdom(1)	—			—			57.2			14		—			—			57.2		14
	Total contributions	$	4		1			$	57.2		14		$	17		2			$	78.2	17
	(1) Kennedy Wilson's contribution in a joint venture investment that was subsequently contributed into KWE as part of its initial investment. See note 1.
Schedule of Joint Venture Cash Distributions by Investment Type and Geographic Location	'
	The following table details cash distributions by investment type and geographic location for the nine months ended September 30, 2014:
		Multifamily						Commercial					Residential and Other						Loan Pools				Total
	(Dollars in millions)	Operating			Investing			Operating			Investing		Operating			Investing			Operating		Investing		Operating			Investing
	Western U.S.	$	7		$	1.5		$	18.9		42.6		5.6			$	4.7		$	0.3	$	2.5	$	31.8		$	51.3
	Japan	1.7			—			—			—		—			—			—		—		1.7			—
	United Kingdom	—			—			9			10.4		—			—			5.2		6.3		14.2			16.7
	Ireland	—			—			31.2			30.3		—			—			—		—		31.2			30.3
	Spain	—			—			—			—		—			1			—		—		—			1
	Total	$	8.7		$	1.5		$	59.1		$	83.3	$	5.6		$	5.7		$	5.5	$	8.8	$	78.9		$	99.3
Schedule of Investment in Loan Pools	'
	The following table represents the demographics of KW Group's investment in the loan pools including the initial unpaid principal balance ("UPB") and the UPB as of September 30, 2014.
	(Dollars in millions)				Kennedy Wilson Ownership		Unpaid Principal Balance							Kennedy Wilson Initial Equity Invested				Investment Balance at September 30, 2014			Expected Accretion Over Total Estimated Collection Period
	Acquisition Date		Location				Initial(1)				September 30, 2014(1)													Accreted to Date
	February 2010(2)		Western U.S.		15.00%		$	342.4			$	—		$	11.2			$	0.5		$	4.5		$	4.6
	Apr-12		Western U.S.		75.00%		43.4				2.8			30.9				2.4			4.3			4
	Aug-12		Ireland		10.00%		458				324.3			7				8.5			1.8			1.3
	Dec-12		United Kingdom		5.00%		631.2				104.9			19.3				2.8			2.2			2
	Apr-13		United Kingdom		10.00%		189.2				105.8			13				5.8			5.1			1.7
	Aug-13		United Kingdom		20.00%		138.7				138.7			7.5				8.5			4.7			1.6
	May 2014(3)		United Kingdom		4.40%		105.8				105.8			30.3				29			2.3			0.6
	Total						$	1,908.70			$	782.3		$	119.2			$	57.5		$	24.9		$	15.8
	(1) Estimated foreign exchange rate is £0.62=1 USD and €0.79 =1 USD as of September 30, 2014.
	(2) Equity invested represents guarantee claims against note holders in loan pool.
	(3) This loan portfolio was directly acquired and held by KWE. Kennedy Wilson owns approximately 13.3% of the total issued share capital of KWE.
Schedule of Interest Income and Foreign Currency Gain (Loss) Recognized in Loan Pool Participations	'
	The following table presents the income from unconsolidated investments for loan pools and foreign currency gain and (loss) recognized by KW Group during the three and nine months ended September 30, 2014 and 2013 for the loan pools that were outstanding:
		Three Months Ended September 30,								Nine Months Ended September 30,
	(Dollars in millions)	2014				2013				2014			2013
	Income from unconsolidated investments - loan pools	$	2.3			$	3.7			$	7		$	9.1
	Unrealized foreign currency translation (loss) gain	(2.9		)		2.1				(2.5		)	(2.9		)
	Total	$	(0.6	)		$	5.8			$	4.5		$	6.2

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Schedule of Fair Value Measurements	'
	The following table presents fair value measurements (including items that are required to be measured at fair value and items for which the fair value option has been elected) as of September 30, 2014:
	(Dollars in millions)	Level 1				Level 2				Level 3				Total
	Marketable securities	$	13.6			$	—			$	—			$	13.6
	Unconsolidated investments	—				—				90.4				90.4
	Currency forward contract	—				22.7				—				22.7
	Currency option contract	—				2.6				—				2.6
	Total	$	13.6			$	25.3			$	90.4			$	129.3
	The following table presents fair value measurements (including items that are required to be measured at fair value and items for which the fair value option has been elected) as of December 31, 2013:
	(Dollars in millions)	Level 1				Level 2				Level 3				Total
	Marketable securities	$	4			$	—			$	—			$	4
	Unconsolidated investments	—				—				81.1				81.1
	Currency forward contract	—				(9.6		)		—				(9.6		)
	Total	$	4			$	(9.6	)		$	81.1			$	75.5
Schedule of Investments in Joint Ventures Held at Fair Value	'
	The following table summarizes our investments in unconsolidated investments held at fair value by type:
	(Dollars in millions)	30-Sep-14				31-Dec-13
	Funds	$	27.7			$	33.5
	FV Option	62.7				47.6
	Total	$	90.4			$	81.1
Schedule of Changes in Level 3 Investments	'
	The following table presents changes in Level 3 investments for the three and nine months ended September 30, 2014 and 2013:
		Three Months Ended September 30,								Nine Months Ended September 30,
	(Dollars in millions)	2014				2013				2014				2013
	Beginning balance	$	78.5			$	74			$	81.1			$	68.4
	Contributions	16.9				1				19.3				6.9
	Distributions	(5.0		)		(0.8		)		(10.0		)		(1.1		)
	Ending balance	$	90.4			$	74.2			$	90.4			$	74.2
Schedule of the Funds and Fair Value Option Investments, Significant Inputs	'
	The table below describes the range of unobservable inputs for real estate assets:
		Estimated Rates Used for
		Capitalization Rates		Discount Rates
	Office	6.00% - 7.50%		7.00% - 9.75%
	Retail	6.00% - 10.00%		9.00% - 12.00%
	Hotel	6.50%		7.50% - 8.00%
	Multifamily	4.40% - 6.75%		4.90% - 9.00%
	Loan	n/a		1.75% - 12.00%
	Land and condominium units	n/a		8.00% - 12.00%
Schedule of Currency Forward Contracts	'
	The table below details the currency forward and option contracts KW Group had as of September 30, 2014:
	(Dollars in millions)											Change in Unrealized Gains (Losses)
	Currency Hedged	Type	Underlying Currency	Notional Amount	Trade Date	Settlement/Expiration Date	Forward Rate/Strike Price	Fair Value				Three Months Ended September 30, 2014				Nine Months Ended September 30, 2014
	EUR	Forward	USD	€ 93.50	5/31/2012 - 6/25/2014	6/4/2015 - 6/27/2019	1.240 - 1.4471	$	3.7			$	9			$	9.1
	GBP	Forward	USD	£95.5	2/13/2014 - 8/27/2014	8/13/2015 - 2/27/2019	1.6356 - 1.6491	1.6				4.4				1.6
	EUR(1)	Forward	GBP	€ 185.00	6/18/2014 - 8/26/2014	8/27/2015 - 8/28/2019	0.8021 - 0.8621	4.7				6				4.8
	Yen(2)	Forward	USD	¥7,500.0	2/6/13	2/8/16	91.645	12.7				8.7				8.7
	Yen(2)(3)	Option	USD	¥10,953.0	9/18/14	3/27/2015 - 6/26/2015	108.45 -110.62	2.6				0.4				0.4
	Total(4)							$	25.3			$	28.5			$	24.6
	(1) Hedge is held by KWE on its wholly-owned subsidiaries.
	(2) Hedge is held by KWR on its wholly-owned subsidiaries.
	(3) For the three and nine months ended September 30, 2014, $0.1 million recognized through results of operations due to portion of hedge not designated as a net investment hedge.
	(4) Hedges are presented gross in the consolidated balance sheet. Hedge assets are included in other assets and hedge liabilities are included in other liabilities.

Other_Assets_Tables

Other Assets (Tables)	9 Months Ended
	Sep. 30, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]	'
Schedule of Other Assets	'
	Other assets consist of the following:
	(Dollars in millions)	September 30, 2014		31-Dec-13
	Above-market leases, net of accumulated amortization of $4.0 million at September 30, 2014	78.9		—
	Deposits and other, net of accumulated amortization of $1.7 million and	22.6		13
	$1.2 million at September 30, 2014 and December 31, 2013, respectively
	Loan fees, net of accumulated amortization of $7.9 million and $4.5 million at September 30, 2014 and December 31, 2013, respectively	33.9		14.1
	Hedge Assets	25.3		—
	Goodwill	23.9		23.9
	Office furniture and equipment net of accumulated depreciation of $4.4 million and $2.2 million at September 30, 2014 and December 31, 2013, respectively	21.4		10.4
	Marketable securities(1)	13.6		4
	Prepaid expenses	12.7		7.6
	Other Assets	$	232.3	$	73
	(1) The amount above excludes Kennedy Wilson's 13.3 million shares in KWE as the investment is eliminated due to the consolidation of KWE's results. Based on the closing price of KWE shares on September 30, 2014, the fair value of Kennedy Wilson's investment in KWE is $234.0 million.

Investment_Debt_Tables

Investment Debt (Tables)	9 Months Ended
	Sep. 30, 2014
Debt Instrument [Line Items]	'
Schedule of Maturities of Mortgage Loans and Notes Payable	'
	The aggregate maturities of investment debt subsequent to September 30, 2014 are as follows:
	(Dollars in millions)
	2014	$	7.4
	2015	124.1
	2016	60.8
	2017	206.1
	2018	330.3
	Thereafter	1,299.80
		2,028.50
	Debt premium	21.3
		$	2,049.80
Mortgage Loans and Notes Payable [Member]	'
Debt Instrument [Line Items]	'
Schedule of Mortgage Loans and Notes Payable	'
	Investment debt at September 30, 2014 and December 31, 2013 consists of the following:
	(Dollars in millions)			Carrying Amount of Investment Debt as of (1)
	Types of Property Pledged as Collateral	Region		September 30,		December 31,
				2014		2013
	Multifamily (1)	Western U.S.		$	449.1	$	261
	Commercial	Western U.S.		133.6		110.4
	Hotels	Western U.S		36.4		28
	Multifamily (1)	Japan		262.4		—
	Commercial	Japan		2.4		2.4
	Commercial (1)	Ireland		320.5		—
	Multifamily (1)(3)	Ireland		173.3		—
	Hotels(1)	Ireland		76.1		—
	Commercial (1)(4)	United Kingdom		596		—
	Investment debt(2)			$	2,049.80	$	401.8
	(1) The investment debt balances include the unamortized debt premiums. Debt premiums represent the excess of the fair value of debt over the principal value of debt assumed in various acquisitions and are amortized into interest expense over the remaining term of the related debt in a manner that approximates the effective interest method. The unamortized loan premium as of September 30, 2014 and December 31, 2013 was $21.3 million and $5.3 million, respectively.
	(2) The investment debt had a weighted average interest rate of 3.29% and 4.13% per annum at September 30, 2014 and December 31, 2013. As of September 30, 2014, 54% of our property level debt is fixed rate, 32% is floating rate with interest caps and 14% is floating rate without interest caps. As of December 31, 2013, 86% of our property level debt is fixed rate, 7% is floating rate with interest caps and 7% is floating rate without interest caps.
	(3) Includes $60.2 million of investment debt on properties that were directly acquired and held by KWE. Kennedy Wilson owns approximately 13.3% of the total issued share capital of KWE.
	(4) Includes $757.5 million of investment debt on properties that were directly acquired and held by KWE. Kennedy Wilson owns approximately 13.3% of the total issued share capital of KWE.

Senior_Notes_Tables

Senior Notes (Tables) (Senior Notes [Member])	9 Months Ended
	Sep. 30, 2014
Senior Notes [Member]	'
Debt Instrument [Line Items]	'
Schedule of Senior Notes	'
				September 30, 2014							December 31, 2013
	(Dollars in millions)					Unamortized							Unamortized
		Interest Rate	Maturity Date	Face Value		Net Premium/(Discount)			Carrying Value		Face Value		Net Premium/(Discount)		Carrying Value
	2042 Notes	7.75%	12/1/42	$	55	$	—		$	55	$	55	$	—	$	55
	2024 Notes	5.88%	4/1/24	300		(2.7		)	297.3		—		—		—
	2019 Notes	8.75%	4/1/19	350		3.6			353.6		350		4		354
	Senior Notes			$	705	$	0.9		$	705.9	$	405	$	4	$	409

Stockholders_Equity_Tables

Stockholders Equity (Tables)	9 Months Ended
	Sep. 30, 2014
Equity [Abstract]	'
Schedule of Dividends Declared and Paid	'
	During the following periods, Kennedy Wilson declared and paid the following cash distributions on its common and preferred stock:
		Nine Months Ended September 30, 2014						Nine Months Ended September 30, 2013
	(Dollars in millions)	Declared			Paid			Declared			Paid
	Preferred Stock
	Series A (1)	$	4.5		$	4.5		$	4.5		$	4.5
	Series B (2)	1.6			1.6			1.6			1.6
	Total Preferred Stock	6.1			6.1			6.1			6.1
	Common Stock (3)	25			22.3			16			10.2
	Total (4)	$	31.1		$	28.4		$	22.1		$	16.3
	(1) 6.00% Series A, 100,000 shares issued and outstanding as of September 30, 2014 and 2013, mandatorily convertible on May 19, 2015, or earlier at the option of the holders thereof.
	(2) 6.45% Series B, 32,550 shares issued and outstanding as of September 30, 2014 and 2013, mandatorily convertible on November 3, 2018, or earlier at the option of the holders thereof, or, in certain circumstances, at our election on or after May 3, 2017.
	(3) $0.0001 par value per share, 200,000,000 and 125,000,000 shares authorized as of September 30, 2014 and 2013, respectively.
	(4) Common stock dividends were declared at the end of each quarter and paid in the following quarter. The amount declared and not paid is accrued on the consolidated balance sheet.
Schedule of Accumulated Other Comprehensive Income (Loss)	'
	The following table summarizes the changes in each component of accumulated other comprehensive income (loss), net of taxes:
		Foreign Currency Translation			Forward Contract Foreign Currency			Marketable Securities			Total Accumulated Other Comprehensive Income
	(Dollars in millions)
	Balance at December 31, 2013	$	4.3		$	4.9		$	—		$	9.2
	Unrealized gains (losses), arising during the period	(107.5		)	24.3			(1.9		)	(85.1		)
	Amounts reclassified out of AOCI during the period(1)	(0.3		)	(6.8		)	—			(7.1		)
	Taxes on unrealized gains (losses), arising during the period	40.4			(7.8		)	0.8			33.4
	Noncontrolling interest	36.4			—			—			36.4
	Balance at September 30, 2014	$	(26.7	)	$	14.6		$	(1.1	)	$	(13.2	)
	(1) Amounts reclassified out of accumulated other comprehensive income relate to the consolidation of investments previously accounted for under the equity method. Pursuant to FASB ASC 805-10, Business Combinations, these amounts are included in the calculation of gain or loss as of the acquisition date. Please refer to Note 4 - Real Estate for further discussion on consolidated acquisitions.

Earnings_Per_Share_Earnings_Pe

Earnings Per Share Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted	'
	The following is a summary of the elements used in calculating basic and diluted income (loss) per share for the three and nine months ended September 30, 2014 and 2013:
		Three Months Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions, except share and per share amounts)	2014			2013			2014			2013
	Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	(2.2	)	$	(4.1	)	$	44.6		$	(10.2	)
	Net income and dividends allocated to participating securities	(0.5		)	—			(2.6		)	—
	Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders, net of allocation to participating securities	(2.7		)	(4.1		)	42			(10.2		)
	Dividends declared on common shares	(8.1		)	(15.2		)	(24.1		)	(5.5		)
	Undistributed (losses) earnings attributable to Kennedy-Wilson Holdings, Inc. common shareholders, net of allocation to participating securities	$	(10.8	)	$	(19.3	)	$	17.9		$	(15.7	)
	Distributed earnings per share	$	0.09		$	0.07		$	0.27		$	0.21
	Undistributed (losses) earnings per share	(0.12		)	(0.13		)	0.2			(0.36		)
	(Loss) income per basic	(0.03		)	(0.06		)	0.47			(0.15		)
	(Loss) income per diluted	$	(0.03	)	$	(0.06	)	$	0.47		$	(0.15	)
	Weighted average shares outstanding for basic	89,267,838			72,643,000			88,854,215			68,486,876
	Weighted average shares outstanding for diluted(1)	89,267,838			72,643,000			90,169,008			68,486,876
	Dividends declared per common share	$	0.09		$	0.07		$	0.27		$	0.21
	(1) For the three months ended September 30, 2014, a total of 12,993,531 potentially dilutive securities have not been included in the diluted weighted average shares as they are anti-dilutive. For the three and nine months ended September 30, 2013, a total of 19,315,303 and 19,620,824 potentially dilutive securities have not been included in the diluted weighted average shares as they are anti-dilutive. Potentially anti-dilutive securities include preferred stock, warrants, and unvested restricted stock grants.

Segment_Information_Tables

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Schedule of Segment Reporting Information, by Segment	'
	The following tables summarize income activity by segment and corporate for the three and nine months ended September 30, 2014 and 2013 and balance sheet data as of September 30, 2014 and December 31, 2013:
		Three Months Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions)	2014			2013			2014			2013
	Investments
	Rental and hotel	$	93.5		$	10.5		$	161.3		27.3
	Sale of real estate	1.6			1.6			19			10.1
	Loan and other	5.7			0.5			11.7			1.4
	Total revenue	100.8			12.6			192			38.8
	Depreciation and amortization	(34.7		)	(4.5		)	(67.3		)	(12.0		)
	Operating expenses	(55.2		)	(13.7		)	(130.2		)	(45.0		)
	Income from unconsolidated investments	11.4			13.2			43.1			30.1
	Operating income	22.3			7.6			37.6			11.9
	Acquisition-related gains	28.9			1.6			199.2			11.1
	Acquisition-related expenses	(5.3		)	—			(16.9		)	(0.5		)
	Interest expense - investment	(13.8		)	(2.8		)	(30.2		)	(7.4		)
	Other	(2.1		)	1			0.8			0.3
	Net income	30			7.4			190.5			15.4
	Net (income) loss attributable to the noncontrolling interests	0.1			0.7			(62.6		)	2.6
	Net income attributable to Kennedy-Wilson Holdings, Inc common shareholders	$	30.1		$	8.1		$	127.9		$	18
		Three Months Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions)	2014			2013			2014			2013
	Services
	Investment management, property services and research fees (includes $8.3, $15.7, $48.9, and $37.8 of related party fees)	$	12.9		$	20.9		$	65		$	54
	Total revenue	12.9			20.9			65			54
	Operating expenses	(14.5		)	(13.3		)	(40.4		)	(31.5		)
	Income from unconsolidated investments	0.7			—			2.8			—
	Operating (loss) income	(0.9		)	7.6			27.4			22.5
	Net loss attributable to the noncontrolling interests	2.7			—			2.7			—
	Net income attributable to Kennedy-Wilson Holdings, Inc common shareholders	$	1.8		$	7.6		$	30.1		$	22.5
		Three Months Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions)	2014			2013			2014			2013
	Corporate
	Operating expenses	$	(9.7	)	$	(5.8	)	$	(25.6	)	$	(16.5	)
	Operating loss	(9.7		)	(5.8		)	(25.6		)	(16.5		)
	Interest expense-corporate	(15.9		)	(10.3		)	(41.1		)	(29.7		)
	Other	—			0.1			—			0.2
	Loss before (provision for) benefit from income taxes	(25.6		)	(16.0		)	(66.7		)	(46.0		)
	(Provision for) benefit from income taxes	(6.6		)	(0.8		)	(40.8		)	1.4
	Net loss	(32.2		)	(16.8		)	(107.5		)	(44.6		)
	Preferred dividends and accretion of preferred stock issuance costs	(2.0		)	(2.0		)	(6.1		)	(6.1		)
	Net loss attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	(34.2	)	$	(18.8	)	$	(113.6	)	$	(50.7	)
		Three Months Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions)	2014			2013			2014			2013
	Consolidated
	Investment management, property services and research fees (includes $8.3, $15.7, $48.9, and $37.8 of related party fees)	$	12.9		$	20.9		$	65		54
	Rental and hotel	93.5			10.5			161.3			27.3
	Sale of real estate	1.6			1.6			19			10.1
	Loans and other	5.7			0.5			11.7			1.4
	Total revenue	113.7			33.5			257			92.8
	Operating expenses	(79.5		)	(32.8		)	(196.2		)	(93.0		)
	Depreciation and amortization	(34.7		)	(4.5		)	(67.3		)	(12.0		)
	Total operating expenses	(114.2		)	(37.3		)	(263.5		)	(105.0		)
	Income from unconsolidated investments	12.1			13.2			45.9			30.1
	Operating income	11.6			9.4			39.4			17.9
	Acquisition-related gain	28.9			1.6			199.2			11.1
	Acquisition-related expenses	(5.3		)	—			(16.9		)	(0.5		)
	Interest expense - investment	(13.8		)	(2.8		)	(30.2		)	(7.4		)
	Interest expense - corporate	(15.9		)	(10.3		)	(41.1		)	(29.7		)
	Other	(1.9		)	0.1			1			0.5
	Income (loss) before benefit from income taxes	3.6			(2.0		)	151.4			(8.1		)
	(Provision for) benefit from income taxes	(6.6		)	(0.8		)	(40.8		)	1.4
	Net income (loss)	(3.0		)	(2.8		)	110.6			(6.7		)
	Net (income) loss attributable to the noncontrolling interests	2.8			0.7			(59.9		)	2.6
Preferred dividends and accretion of preferred stock issuance costs	(2.0		)	(2.0		)	(6.1		)	(6.1		)
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	(2.2	)	$	(4.1	)	$	44.6		$	(10.2	)
(Dollars in millions)	30-Sep-14			31-Dec-13
Total Assets
Investments	$	5,381.70		$	1,607.50
Services	49.4			49.3
Corporate	282.2			142
Total assets	$	5,713.30		$	1,798.80

Guarantor_and_NonGuarantor_Fin1

Guarantor and Non-Guarantor Financial Statements (Tables)	9 Months Ended
	Sep. 30, 2014
Guarantor and Nonguarantor Financial Statements [Abstract]	'
Condensed Consolidating Balance Sheet	'
	CONDENSED CONSOLIDATING BALANCE SHEET
	AS OF SEPTEMBER 30, 2014
	(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
	Assets
	Cash and cash equivalents	$	—		$	71		$	46.8		$	118.5		$	—		$	236.3
	Cash held by consolidated investments	—			—			—			591.3			—			591.3
	Accounts receivable	—			—			21.2			21			—			42.2
	Loans	—			38.4			15.5			250.6			(37.8		)	266.7
	Real estate and acquired in place lease values, net of accumulated depreciation and amortization	—			—			345.4			3,494.20			—			3,839.60
	Unconsolidated investments	—			9.3			334.5			161.1			—			504.9
	Other assets	—			29.1			44.5			158.7			—			232.3
	Investments in and advances to consolidated subsidiaries	964.9			1,650.80			1,061.30			—			(3,677.0		)	—
	Total assets	$	964.9		$	1,798.60		$	1,869.20		$	4,795.40		$	(3,714.8	)	$	5,713.30
	Liabilities and equity
	Liabilities
	Accounts payable, accrued expenses and other liabilities	$	9.5		$	127.8		$	23.2		$	93.3		$	—		$	253.8
	Senior notes payable	—			705.9			—			—			—			705.9
	Investment debt	—			—			194.8			1,892.80			(37.8		)	2,049.80
	Total liabilities	9.5			833.7			218			1,986.10			(37.8		)	3,009.50
	Equity
	Kennedy-Wilson Holdings, Inc. shareholders' equity	955.4			964.9			1,650.80			1,061.30			(3,677.0		)	955.4
	Noncontrolling interests	—			—			0.4			1,748.00			—			1,748.40
	Total equity	955.4			964.9			1,651.20			2,809.30			(3,677.0		)	2,703.80
	Total liabilities and equity	$	964.9		$	1,798.60		$	1,869.20		$	4,795.40		$	(3,714.8	)	$	5,713.30
	CONDENSED CONSOLIDATING BALANCE SHEET
	AS OF DECEMBER 31, 2013
	(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
	Assets
	Cash and cash equivalents	$	—		$	48.2		$	77.2		$	44.8		$	—		$	170.2
	Cash held by consolidated investments	—			—			—			8			—			8
	Accounts receivable	—			1.1			7			8.5			—			16.6
	Intercompany receivables	—			9			—			—			(9.0		)	—
	Loans receivable	—			59.7			53.7			0.8			(57.4		)	56.8
	Real estate and acquired in place lease values, net of accumulated depreciation	—			—			145.3			542.8			—			688.1
	Unconsolidated investments	—			7.5			598			180.6			—			786.1
	Investments in and advances to consolidated subsidiaries	775.1			1,141.90			326.6			—			(2,243.6		)	—
	Other assets	—			20.9			31.4			20.7			—			73
	Total assets	$	775.1		$	1,288.30		$	1,239.20		$	806.2		$	(2,310.0	)	$	1,798.80
	Liabilities
	Accounts payable, accrued expense and other liabilities	$	6.8		$	64.2		$	22.9		$	35.2		$	—		129.1
	Intercompany payables	—			—			—			9			(9.0		)	—
	Senior notes payable	—			409			—			—			—			409
	Intercompany loans payable	—			—			—			57.4			(57.4		)	—
	Investment debt	—			—			74.4			327.4			—			401.8
	Junior subordinated debentures	—			40			—			—			—			40
	Total liabilities	6.8			513.2			97.3			429			(66.4		)	979.9
	Equity
	Kennedy-Wilson Holdings, Inc. shareholders' equity	768.3			775.1			1,141.90			326.6			(2,243.6		)	768.3
	Noncontrolling interests	—			—			—			50.6			—			50.6
	Total equity	768.3			775.1			1,141.90			377.2			(2,243.6		)	818.9
	Total liabilities and equity	$	775.1		$	1,288.30		$	1,239.20		$	806.2		$	(2,310.0	)	$	1,798.80
Consolidating Statement of Operations	'
	CONSOLIDATING STATEMENT OF OPERATIONS
	FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2014
	(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
	Revenue
	Investment management, property services and research fees	$	—		$	(0.5	)	$	14.1		$	(0.7	)	$	—		$	12.9
	Rental and hotel	—			—			5.6			87.9			—			93.5
	Sale of real estate	—			—			0.1			1.5			—			1.6
	Loans and other	—			0.1			(2.8		)	8.4			—			5.7
	Total revenue	—			(0.4		)	17			97.1			—			113.7
	Operating expenses
	Commission and marketing	—			—			1.6			0.4			—			2
	Rental and hotel operating	—			—			(5.5		)	43.3			—			37.8
	Cost of real estate sold	—			—			—			1.1			—			1.1
	Compensation and related	5.3			8.8			10.7			2			—			26.8
	General and administrative	—			3.8			7.5			0.5			—			11.8
	Depreciation and amortization	—			0.2			3.1			31.4			—			34.7
	Total operating expenses	5.3			12.8			17.4			78.7			—			114.2
	Income from unconsolidated subsidiaries	—			2.1			4.2			5.8			—			12.1
	Income from consolidated subsidiaries	2.3			35.7			30.2			—			(68.2		)	—
	Operating income (loss)	(3.0		)	24.6			34			24.2			(68.2		)	11.6
	Non-operating income (expense)
	Acquisition-related gains	—			—			—			28.9			—			28.9
	Acquisition-related expenses	—			—			(0.1		)	(5.2		)	—			(5.3		)
	Interest expense-investment	—			—			(3.5		)	(10.3		)	—			(13.8		)
	Interest expense-corporate	—			(15.9		)	—			—			—			(15.9		)
	Other income / (expense)	—			(0.2		)	—			(1.7		)	—			(1.9		)
	Income (loss) before benefit from income taxes	(3.0		)	8.5			30.4			35.9			(68.2		)	3.6
	(Provision for) benefit from income taxes	—			(6.1		)	5.1			(5.6		)	—			(6.6		)
	Net income (loss)	(3.0		)	2.4			35.5			30.3			(68.2		)	(3.0		)
	Net (income) loss attributable to the noncontrolling interests	—			—			—			2.8			—			2.8
	Net income (loss) attributable to Kennedy-Wilson Holdings, Inc.	(3.0		)	2.4			35.5			33.1			(68.2		)	(0.2		)
	Preferred dividends and accretion of preferred stock issuance costs	(2.0		)	—			—			—			—			(2.0		)
	Net income (loss) attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	(5.0	)	$	2.4		$	35.5		$	33.1		$	(68.2	)	$	(2.2	)
	CONSOLIDATING STATEMENT OF OPERATIONS
	FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2014
	(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
	Revenue
	Investment management, property services and research fees	$	—		$	—		$	62.6		$	2.4		$	—		$	65
	Rental and hotel	—			—			12			149.3			—			161.3
	Sale of real estate	—			—			0.7			18.3			—			19
	Loans and other	—			0.2			1.5			10			—			11.7
	Total revenue	—			0.2			76.8			180			—			257
	Operating expenses
	Commission and marketing	—			—			3			0.8			—			3.8
	Rental and hotel operating	—			—			(3.1		)	73			—			69.9
	Cost of real estate sold	—			—			0.7			13.9			—			14.6
	Compensation and related	8.7			39			27			4.9			—			79.6
	General and administrative	—			9.4			11.5			7.4			—			28.3
	Depreciation and amortization	—			0.7			7.9			58.7			—			67.3
	Total operating expenses	8.7			49.1			47			158.7			—			263.5
	Income from unconsolidated subsidiaries	—			3.3			35.1			7.5			—			45.9
	Income from consolidated subsidiaries	119.3			245.2			183.1			—			(547.6		)	—
	Operating income (loss)	110.6			199.6			248			28.8			(547.6		)	39.4
	Non-operating income (expense)
	Acquisition-related gains	—			(7.0		)	3.7			202.5			—			199.2
	Acquisition-related expenses	—			—			(1.7		)	(15.2		)	—			(16.9		)
	Interest expense-investment	—			—			(3.5		)	(26.7		)	—			(30.2		)
	Interest expense-corporate	—			(41.1		)	—			—			—			(41.1		)
	Other income / (expense)	—			—			1.5			(0.5		)	—			1
	Income (loss) before benefit from income taxes	110.6			151.5			248			188.9			(547.6		)	151.4
	(Provision for) benefit from income taxes	—			(32.2		)	(3.0		)	(5.6		)	—			(40.8		)
	Net income (loss)	110.6			119.3			245			183.3			(547.6		)	110.6
	Net (income) loss attributable to the noncontrolling interests	—			—			—			(59.9		)	—			(59.9		)
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc.	110.6			119.3			245			123.4			(547.6		)	50.7
Preferred dividends and accretion of preferred stock issuance costs	(6.1		)	—			—			—			—			(6.1		)
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	104.5		$	119.3		$	245		$	123.4		$	(547.6	)	$	44.6
CONSOLIDATING STATEMENT OF OPERATIONS
FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2013
(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
Revenue
Investment management, property services, and research fees	$	—		$	—		$	7.3		$	13.6		$	—		$	20.9
Rental and hotel	—			0.2			1.5			8.8			—			10.5
Sale of real estate	—			—			1.6			—			—			1.6
Loans and other	—			—			0.5			—			—			0.5
Total revenue	—			0.2			10.9			22.4			—			33.5
Operating expenses
Commission and marketing	—			—			0.8			0.2			—			1
Rental and hotel operating	—			—			1			3.2			—			4.2
Cost of real estate sold	—			—			0.9			—			—			0.9
Compensation and related	2			11.5			3.8			3.6			—			20.9
General and administrative	—			2			1.4			2.4			—			5.8
Depreciation and amortization	—			0.1			1.3			3.1						4.5
Total operating expenses	2			13.6			9.2			12.5			—			37.3
Income from unconsolidated investments, net of depreciation and amortization	—			0.3			19.5			(6.6		)	—			13.2
Income from consolidated subsidiaries	(0.7		)	23.6			2.8			—			(25.7		)	—
Operating income (expense)	(2.7		)	10.5			24			3.3			(25.7		)	9.4
Non-operating income (expense)
Acquisition-related gains	—			—			—			1.6			—			1.6
Interest expense-investment	—			—			(0.2		)	(2.6		)				(2.8		)
Interest expense-corporate	—			(10.3		)	—			—			—			(10.3		)
Other income	—			0.1			—			—			—			0.1
(Loss) income before benefit from income taxes	(2.7		)	0.3			23.8			2.3			(25.7		)	(2.0		)
Benefit from (provision for) income taxes	—			(1.1		)	—			0.3			—			(0.8		)
Net (loss) income	(2.7		)	(0.8		)	23.8			2.6			(25.7		)	(2.8		)
Net income attributable to the noncontrolling interests	—			—			(0.1		)	0.8			—			0.7
Preferred dividends and accretion of preferred stock issuance costs	(2.0		)	—			—			—			—			(2.0		)
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	(4.7	)	$	(0.8	)	$	23.7		$	3.4		$	(25.7	)	$	(4.1	)
CONSOLIDATING STATEMENT OF OPERATIONS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2013
(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
Revenue
Investment management, property services, and research fees	$	—		$	0.6		$	21.5		$	31.9		$	—		$	54
Rental and hotel	—			0.2			4.7			22.4			—			27.3
Sale of real estate	—			—			10.1			—			—			10.1
Loans and other	—			—			1.4			—			—			1.4
Total revenue	—			0.8			37.7			54.3			—			92.8
Operating expenses
Commission and marketing	—			0.4			2.2			0.2			—			2.8
Rental and hotel operating	—			—			2.6			9.3			—			11.9
Cost of real estate sold	—			—			7.9			—			—			7.9
Compensation and related	5.5			25.1			10.8			11.4			—			52.8
General and administrative	0.3			6.4			3.5			7.4			—			17.6
Depreciation and amortization	—			0.4			3.6			8			—			12
Total operating expenses	5.8			32.3			30.6			36.3			—			105
Income from unconsolidated investments, net of depreciation and amortization	—			0.3			39.7			(9.9		)	—			30.1
Income from consolidated subsidiaries	(0.8		)	58.3			12.3			—			(69.8		)	—
Operating income (expense)	(6.6		)	27.1			59.1			8.1			(69.8		)	17.9
Non-operating income (expense)
Acquisition-related gains	—			—			—			11.1			—			11.1
Acquisition-related expense	—			—			(0.2		)	(0.3		)	—			(0.5		)
Interest expense-investment	—			—			(0.7		)	(6.7		)	—			(7.4		)
Interest expense-corporate				(29.7		)	—			—			—			(29.7		)
Other income	—			0.4			0.1			—			—			0.5
(Loss) income before benefit from income taxes	(6.6		)	(2.2		)	58.3			12.2			(69.8		)	(8.1		)
Benefit from (provision for) income taxes	—			1.4			—			—			—			1.4
Net (loss) income	(6.6		)	(0.8		)	58.3			12.2			(69.8		)	(6.7		)
Net income attributable to the noncontrolling interests	—			—			(0.1		)	2.7			—			2.6
Preferred dividends and accretion of preferred stock issuance costs	(6.1		)	—			—			—			—			(6.1		)
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$	(12.7	)	$	(0.8	)	$	58.2		$	14.9		$	(69.8	)	$	(10.2	)
Consolidated Statement of Comprehensive Income	'
	CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
	FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2014
	(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
	Net (loss) income	$	(3.0	)	$	2.4		$	35.5		$	30.3		$	(68.2	)	$	(3.0	)
	Other comprehensive income (loss), net of tax:
	Unrealized foreign currency translation (loss) gain	(89.0		)	(89.0		)	(21.4		)	(12.6		)	123			(89.0		)
	Amounts reclassified out of AOCI during the period	—			—			9.5			(9.5		)	—			—
	Loss on marketable securities	(1.1		)	(1.1		)	—			—			1.1			(1.1		)
	Unrealized forward contract foreign currency (loss) gain	20.1			20.1			6.5			11.3			(37.9		)	20.1
	Total other comprehensive (loss) income for the period	$	(70.0	)	$	(70.0	)	$	(5.4	)	$	(10.8	)	$	86.2		$	(70.0	)
	Comprehensive income	$	(73.0	)	$	(67.6	)	$	30.1		$	19.5		$	18		$	(73.0	)
	Comprehensive (income) loss attributable to noncontrolling interests	—			—			—			58			—			58
	Comprehensive income attributable to Kennedy-Wilson Holdings, Inc.	$	(73.0	)	$	(67.6	)	$	30.1		$	77.5		$	18		$	(15.0	)
	CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
	FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2013
	(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
	Net (loss) income	$	(2.7	)	$	(0.8	)	$	23.8		$	2.6		$	(25.7	)	$	(2.8	)
	Other comprehensive income (loss), net of tax:
	Unrealized foreign currency translation gains	8.8			8.8			6.4			2.3			(17.5		)	8.8
	Unrealized forward contract foreign currency loss	(3.6		)	(3.6		)	0.1			—			3.5			(3.6		)
	Total other comprehensive income for the period	$	5.2		$	5.2		$	6.5		$	2.3		$	(14.0	)	$	5.2
	Comprehensive (loss) income	$	2.5		$	4.4		$	30.3		$	4.9		$	(39.7	)	$	2.4
	Comprehensive income attributable to noncontrolling interests	—			—			(0.1		)	0.8			—			0.7
	Comprehensive (loss) income attributable to Kennedy-Wilson Holdings, Inc.	$	2.5		$	4.4		$	30.2		$	5.7		$	(39.7	)	$	3.1
	CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
	FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2014
	(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
	Net income (loss)	$	110.6		$	119.3		$	245		$	183.3		$	(547.6	)	$	110.6
	Other comprehensive income (loss), net of tax:
	Unrealized foreign currency translation (loss) gain	(67.1		)	(67.1		)	2.5			(16.5		)	81.1			(67.1		)
	Amounts reclassified out of AOCI during the period	(7.1		)	(7.1		)	1.2			(8.3		)	14.2			(7.1		)
	Loss on marketable securities	(1.1		)	(1.1		)	—			—			1.1			(1.1		)
	Unrealized forward contract foreign currency (loss) gain	16.5			16.5			5.3			10.1			(31.9		)	16.5
	Total other comprehensive (loss) income for the period	$	(58.8	)	$	(58.8	)	$	9		$	(14.7	)	$	64.5		$	(58.8	)
	Comprehensive income	$	51.8		$	60.5		$	254		$	168.6		$	(483.1	)	$	51.8
	Comprehensive (income) loss attributable to noncontrolling interests	—			—			—			(23.5		)	—			(23.5		)
	Comprehensive income attributable to Kennedy-Wilson Holdings, Inc.	$	51.8		$	60.5		$	254		$	145.1		$	(483.1	)	$	28.3
	CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
	FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2013
	(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Elimination			Consolidated Total
	Net (loss) income	$	(6.6	)	$	(0.8	)	$	58.3		$	12.2		$	(69.8	)	$	(6.7	)
	Other comprehensive income (loss), net of tax:
	Unrealized foreign currency translation gains	(9.2		)	(9.2		)	(11.6		)	(0.3		)	21.1			(9.2		)
	Unrealized forward contract foreign currency loss	2.2			2.2			5.4			—			(7.6		)	2.2
	Total other comprehensive income for the period	$	(7.0	)	$	(7.0	)	$	(6.2	)	$	(0.3	)	$	13.5		$	(7.0	)
	Comprehensive (loss) income	$	(13.6	)	$	(7.8	)	$	52.1		$	11.9		$	(56.3	)	$	(13.7	)
	Comprehensive income attributable to noncontrolling interests	—			—			(0.2		)	2.8			—			2.6
	Comprehensive (loss) income attributable to Kennedy-Wilson Holdings, Inc.	$	(13.6	)	$	(7.8	)	$	51.9		$	14.7		$	(56.3	)	$	(11.1	)
Condensed Consolidated Statement of Cash Flows	'
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
	FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2014
	(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Consolidated Total
	Net cash provided by (used in) operating activities	$	(0.1	)	$	(25.7	)	$	73.7		$	37.8		$	85.7
	Cash flows from investing activities:
	Additions to loans	—			—			(5.8		)	(470.6		)	(476.4		)
	Collections of loans	—			—			15.1			80.8			95.9
	Net proceeds from sale of real estate	—			—			—			16.3			16.3
	Purchases of and additions to real estate	—			(0.6		)	(71.6		)	(1,466.0		)	(1,538.2		)
	Proceeds from settlement of foreign forward contracts	—			—			—			7.5			7.5
	Purchases of foreign currency options	—			—			—			(2.2		)	(2.2		)
	Distributions from unconsolidated investments	—			0.3			51.6			47.4			99.3
	Contributions to unconsolidated investments	—			(2.0		)	(47.9		)	(89.7		)	(139.6		)
	Investment in marketable securities	—			—			(11.5		)	—			(11.5		)
	(Investments in) distributions from consolidated subsidiaries, net	(159.3		)	(198.4		)	(65.0		)	422.7			—
	Net cash (used in) provided by investing activities	(159.3		)	(200.7		)	(135.1		)	(1,453.8		)	(1,948.9		)
	Cash flows from financing activities:
	Borrowings under line of credit	—			90			—			—			90
	Repayment of line of credit	—			(90.0		)	—			—			(90.0		)
	Borrowings under investment debt	—			—			31.5			793.6			825.1
	Borrowings under senior notes payable	—			297.2			—			—			297.2
	Debt issue costs	—			(7.8		)	(0.6		)	(20.1		)	(28.5		)
	Repayment of investment debt	—			(40.0		)	(0.1		)	(32.1		)	(72.2		)
	Issuance of common stock	190.6			—			—			—			190.6
	Dividends paid	(28.4		)	—			—			—			(28.4		)
	Repurchase and retirement of common stock	(2.9		)	—			—			—			(2.9		)
	Proceeds from issuance of KWE shares	—			—			—			1,351.10			1,351.10
	Restricted cash	—			—			—			(42.6		)	(42.6		)
	Acquisition of KWE shares from noncontrolling interest holders	—			—			—			(16.8		)	(16.8		)
	Contributions from noncontrolling interests	—			—			—			12.9			12.9
	Distributions to noncontrolling interests	—			—			—			(24.3		)	(24.3		)
	Net cash provided by financing activities	159.3			249.4			30.8			2,021.70			2,461.20
	Effect of currency exchange rate changes on cash and cash equivalents	—			—			—			10.8			10.8
	Net change in cash and cash equivalents	(0.1		)	23			(30.6		)	616.5			608.8
	Cash and cash equivalents, beginning of year	—			48.2			77.2			52.8			178.2
	Cash and cash equivalents, end of period	$	(0.1	)	$	71.2		$	46.6		$	669.3		$	787
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
	FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2013
	(Dollars in millions)	Parent			Kennedy-Wilson, Inc.			Guarantor Subsidiaries			Non-guarantor Subsidiaries			Consolidated Total
	Net cash (used in) provided by operating activities	$	0.2		$	(62.2	)	$	36.5		$	8.4		$	(17.1	)
	Cash flows from investing activities:
	Additions to loans	—			(8.2		)	(22.1		)	—			(30.3		)
	Collections of loans	—			4.9			38			0.1			43
	Net proceeds from sale of real estate	—			—			10.1			0.4			10.5
	Purchases of and additions to real estate	—			—			(31.3		)	(84.6		)	(115.9		)
	Capitalized Development Costs	—			(1.3		)	—			—			(1.3		)
	Proceeds from maturities to short term investments	—			10			—			—			10
	Distributions from unconsolidated investments	—			0.4			135.7			7.2			143.3
	Contributions to unconsolidated investments	—			(2.3		)	(214.6		)	(97.4		)	(314.3		)
	(Investment in) distributions from consolidated subsidiaries, net	(263.2		)	178.7			8.1			76.4			—
	Net cash (used in) provided by investing activities	(263.2		)	182.2			(76.1		)	(97.9		)	(255.0		)
	Cash flows from financing activities:
	Borrowings under line of credit	—			125			—			—			125
	Repayment of lines of credit	—			(125.0		)	—			—			(125.0		)
	Borrowings under investment debt	—			—			18.7			53.6			72.3
	Repayment of investment debt	—			—			—			(1.1		)	(1.1		)
	Debt issue costs	—			(1.3		)	(0.1		)	(0.4		)	(1.8		)
	Issuance of common stock	276			—			—			—			276
	Repurchase of warrants	(1.4		)	—			—			—			(1.4		)
	Dividends paid	(16.3		)	—			—			—			(16.3		)
	Contributions from noncontrolling interests	—			—			—			0.9			0.9
	Intercompany receivables, net	—			(21.9		)	—			21.9			—
	Distributions to noncontrolling interests	—			—			—			(0.4		)	(0.4		)
Exercise of warrants	4.7			—			—			—			4.7
Net cash provided by (used in) financing activities	263			(23.2		)	18.6			74.5			332.9
Effect of currency exchange rate changes on cash and cash equivalents	—			0.2			(10.4		)	9.9			(0.3		)
Net change in cash and cash equivalents	—			97			(31.4		)	(5.1		)	60.5
Cash and cash equivalents, beginning of period	—			64.5			38.5			17.9			120.9
Cash and cash equivalents, end of period	$	—		$	161.5		$	7.1		$	12.8		$	181.4

Basis_of_Presentation_Basis_of

Basis of Presentation Basis of Presentation (Details) (KWE [Member], USD $)	3 Months Ended	6 Months Ended	9 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2014	Sep. 30, 2014
KWE [Member]	'	'	'
Noncontrolling Interest [Line Items]	'	'	'
Proceeds from issuance initial public offering	$1,700	'	'
Ordinary shares, initial public offering share subscription, cash	145.2	'	'
Ordinary shares, initial public offering share subscription, contribution of assets	58.3	'	'
Acquired subsequent to initial public offering, shares	'	1,000,000	'
Acquisition of KWE shares from noncontrolling interest holders	'	$16.80	$16.80
Ownership percentage by parent	'	13.30%	13.30%

Summary_of_Significant_Account2

Summary of Significant Accounting Policies and Adoption of New Accounting Pronouncements (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Accounting Policies [Abstract]	'	'
Accrued Performance Fees	$7.30	$6.10

Loans_Details

Loans (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans	$266.70	$56.80
Loans b related parties	0	4.1
Loans Receivable [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans	266.7	52.7
Loans b related parties	0	4.1
Total loans	$266.70	$56.80

Loans_Narrative_Details

Loans (Narrative) (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

3 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Mar. 31, 2014

Sep. 30, 2014

Sep. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Sep. 30, 2014

Mar. 31, 2014

Sep. 30, 2014

Property

Loan

Hotel Acquired in Ireland [Member]

Hotel Acquired in Ireland [Member]

High Tech Properties in England [Member]

High Tech Properties in England [Member]

Commercial Properties in England and Scotland [Member]

Commercial Properties in England and Scotland [Member]

Retail Acquired in California [Member]

Retail Acquired in California [Member]

Vacant Lot Acquired in California [Member]

Vacant Lot Acquired in California [Member]

Loan

Notes Receivable [Member]

Notes Receivable [Member]

Property

Notes Receivable [Member]

Property

Notes Receivable [Member]

sqft

sqft

acre

acre

Loan

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loans acquired

$97

'

$97

'

'

$152.40

'

$156.30

'

$62.20

'

'

'

'

Loan ownership conversion percentage

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

Number of loans

'

'

19

'

'

'

5

'

'

'

'

'

'

'

Number of properties securing loans

13

'

'

'

'

'

5

'

20

'

'

'

'

'

Fair value of loans acquired

152.8

'

152.8

'

'

'

'

'

'

'

30.4

'

'

'

Number of related-party funds paid off

2

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest income on loans

$5.70

$0.50

$11.20

$1.30

'

'

'

'

'

'

'

'

'

'

Square foot of retail center acquired through foreclosure

'

'

'

'

'

'

'

'

'

'

133,000

133,000

'

'

Number of acre lot acquired by foreclosure

'

'

'

'

'

'

'

'

'

'

'

'

2.4

2.4

Real_Estate_and_InPlace_Lease_2

Real Estate and In-Place Lease Value (Narrative) (Details) (USD $)

0 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Mar. 31, 2014

Sep. 30, 2014

Mar. 31, 2014

Sep. 30, 2014

Mar. 31, 2014

Sep. 30, 2014

Mar. 31, 2014

Mar. 31, 2014

Sep. 30, 2014

Sep. 30, 2014

Mar. 31, 2014

Jun. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

JointVenture

JointVenture

Retail Acquired in California [Member]

Retail Acquired in California [Member]

Vacant Lot Acquired in California [Member]

Vacant Lot Acquired in California [Member]

Retail Center and Vacant Land Acquired in California [Member]

Hotel Acquired in California [Member]

Maximum [Member]

Maximum [Member]

Real Estate Investments in United Kingdom and Ireland [Member]

KW Residential, LLC [Member]

Leases, Acquired-in-Place [Member]

KWE [Member]

sqft

sqft

acre

acre

Building and Building Improvements [Member]

ApartmentBuildling

Commercial Acquired in United Kingdom 3 [Member]

apartment_unit

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Buildings and building improvements estimated lives

'

'

'

'

'

'

'

'

'

'40 years

'

'

'

'

Acquired in-place lease estimated useful life

'

'

'

'

'

'

'

'

'

'

'

'

'7 years 4 months 24 days

'

Number of joint venture investments consolidated

6

7

'

'

'

'

'

'

'

'

'

'

'

'

Number of properties acquired

'

'

'

'

'

'

'

'

'

'

'

50

'

'

Number of apartment units acquired

'

'

'

'

'

'

'

'

'

'

'

2,400

'

'

Equity method investment, ownership percentage

'

'

'

'

'

'

'

'

50.00%

'

50.00%

41.00%

'

'

Square foot of retail center acquired through foreclosure

'

'

133,000

133,000

'

'

'

'

'

'

'

'

'

'

Number of acre lot acquired by foreclosure

'

'

'

'

2.4

2.4

'

'

'

'

'

'

'

'

Acquisition-related gain

'

'

'

'

'

'

$3.70

$28.60

'

'

'

'

'

$15.50

Real_Estate_and_InPlace_Lease_3

Real Estate and In-Place Lease Value (Schedule of Investments in Consolidated Properties) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Real Estate [Abstract]	'	'
Land	$955.30	$187.80
Buildings	2,657.50	484.1
Building improvements	48.4	12.7
In-place lease value	267	29.8
Real estate, gross	3,928.20	714.4
Less accumulated depreciation and amortization	-88.6	-26.3
Real estate, net	$3,839.60	$688.10

Real_Estate_and_InPlace_Lease_4

Real Estate and In-Place Lease Value - Schedule of Acquisitions (Details) (USD $)

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Feb. 28, 2014

Sep. 30, 2014

In Millions, unless otherwise specified

Commercial Acquired in United Kingdom 1 [Member]

Hotel Acquired in Western United States [Member]

Multifamily Acquired in Ireland [Member]

Commercial Acquired in United Kingdom 2 [Member]

Multifamily Acquired in Ireland 2 [Member]

Commercial Acquired in Western U.S. 1 [Member]

Multifamily Acquired in Western U.S. 1 [Member]

Multifamily Acquired in Ireland 3 [Member]

Commercial Acquired in Ireland 2 [Member]

Commercial Acquired in United Kingdom 3 [Member]

Multifamily Acquired in Western U.S. 2 [Member]

Hotel Acquired in Ireland 2 [Member]

Multifamily Acquired in Western U.S. 4 [Member]

Hotel Acquired in United Kingdom 4 [Member]

Multifamily Acquired in Western U.S. 5 [Member]

Commercial Acquired in Ireland 3 [Member]

Commercial Acquired in Ireland [Member]

Commercial and Loan Acquired in UK [Member]

KWE [Member]

KWE [Member]

KWE [Member]

Property

room

penthouse_unit

Property

apartment_unit

sqft

Unit

Unit

Property

Property

Unit

room

Property

golf_course

Unit

sqft

Property

Property

Commercial Acquired in United Kingdom 3 [Member]

apartment_unit

sqft

apartment_unit

room

Property

sqft

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Land

$426

[1]

$28.90

[1],[2]

$1.30

[1]

$0.60

[1]

$54

[1],[3]

$32.70

[1],[4]

$2.40

[1]

$2.70

[1]

$4.80

[1],[3]

$104.90

[1],[3]

$106.80

[1],[3],[5]

$38.30

[1]

$6.30

[1],[3]

$21.30

[1]

$11.90

[1],[3]

$2.10

[1]

$7

[1],[3]

'

'

'

'

'

Building

1,252.60

[1]

47.1

[1],[2]

8.3

[1]

15.1

[1]

132

[1],[3]

80.9

[1],[4]

5.8

[1]

24

[1]

15

[1],[3]

344.3

[1],[3]

300.7

[1],[3],[5]

57.5

[1]

28.6

[1],[3]

106.2

[1]

35.2

[1],[3]

18.6

[1]

33.3

[1],[3]

'

'

'

'

'

Intangible assets

295.6

[1]

41.4

[1],[2]

0

[1]

0.4

[1]

54

[1],[3]

1.2

[1],[4]

0.4

[1]

0.3

[1]

0.4

[1],[3]

52.3

[1],[3]

127

[1],[3],[5]

0.6

[1]

0

[1],[3]

1.4

[1]

0

[1],[3]

0.1

[1]

16.1

[1],[3]

'

'

'

'

'

Investment debt

558.3

[1]

0

[1],[2]

0

[1]

9.6

[1]

0

[1],[3]

78.9

[1],[4]

6

[1]

13.3

[1]

0

[1],[3]

273.1

[1],[3]

0

[1],[3],[5]

77.2

[1]

0

[1],[3]

86.7

[1]

0

[1],[3]

13.5

[1]

0

[1],[3]

'

'

'

'

'

KWH Shareholders' Equity

342.4

[1]

58.7

[1],[2]

6.9

[1]

6.5

[1]

29.3

[1],[3]

35.9

[1],[4]

1.9

[1]

13.3

[1]

2.7

[1],[3]

30.1

[1],[3]

70.6

[1],[3],[5]

18.6

[1]

4.6

[1],[3]

42.2

[1]

6.3

[1],[3]

7.3

[1]

7.5

[1],[3]

'

'

'

'

'

Number of properties acquired

'

14

[2]

'

3

26

[3]

'

'

'

'

13

[3]

21

[3],[5]

'

'

3

'

'

'

2

2

'

'

'

Number of rooms acquired

'

'

193

'

'

'

'

'

'

'

'

'

138

[3]

'

209

[3]

'

'

'

'

'

'

'

Number of golf courses acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

[3]

'

'

'

'

'

'

'

Number of apartment units acquired

'

'

'

24

'

281

[4]

'

203

81

[3]

'

'

542

'

1,212

'

118

'

'

'

'

'

'

Number of penthouse units acquired

'

'

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Square feet of property acquired

'

'

'

1,000

'

725,000

[4]

98,000

'

'

'

'

'

'

'

'

'

130,000

[3]

'

'

'

'

'

Contribution of interest percentage in portfolio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

Ownership percentage by parent

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

13.30%

'

'

Acquisition-related gain

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$15.50

[1]

Excludes acquisition expenses and net other assets

[2]

On February 28, 2014, the Company contributed its 50% interest in this portfolio to KWE as part of the Company's investment in KWE's initial public offering.

[3]

These portfolios of properties were directly acquired and held by KWE. Kennedy Wilson owns approximately 13.3% of the total issued share capital of KWE.

[4]

This asset was sold to KWE on June 24, 2014.

[5]

KWE recognized an acquisition-related gain of $15.5 million on the transaction due to its ability to acquire the underlying real estate at a discount to its fair value. See loans converted to real estate section below.

Real_Estate_and_InPlace_Lease_5

Real Estate and In-Place Lease Value - Joint Venture Consolidations (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Real Estate Properties [Line Items]	'
Cash	$38.50
Real estate and acquired in-place lease values	1,168.60
Accounts receivable and other assets	28.4
Accounts payable, accrued expenses, and other liabilities	23
Investment debt	574
Noncontrolling interests	353.3
Acquisition related gain	151.4	[1]
Multifamily Acquired in Ireland [Member]	'
Real Estate Properties [Line Items]	'
Cash	3.6
Real estate and acquired in-place lease values	248.5
Accounts receivable and other assets	0.9
Accounts payable, accrued expenses, and other liabilities	5.4
Investment debt	114.3
Noncontrolling interests	66.6
Acquisition related gain	39.3	[1]
Number of properties acquired	3
Commercial Acquired in Ireland [Member]	'
Real Estate Properties [Line Items]	'
Cash	4.3
Real estate and acquired in-place lease values	223.9
Accounts receivable and other assets	7.6
Accounts payable, accrued expenses, and other liabilities	4.9
Investment debt	75.2
Noncontrolling interests	77.9
Acquisition related gain	33.5	[1]
Number of properties acquired	2
Commercial and Loan Acquired in UK [Member]	'
Real Estate Properties [Line Items]	'
Cash	9.6
Real estate and acquired in-place lease values	195
Accounts receivable and other assets	5.6
Accounts payable, accrued expenses, and other liabilities	8.1
Investment debt	100.8
Noncontrolling interests	62
Acquisition related gain	11.9	[1]
Number of properties acquired	2
Multifamily Acquired in Japan [Member]	'
Real Estate Properties [Line Items]	'
Cash	21
Real estate and acquired in-place lease values	501.2
Accounts receivable and other assets	14.3
Accounts payable, accrued expenses, and other liabilities	4.6
Investment debt	283.7
Noncontrolling interests	146.8
Acquisition related gain	66.7	[1]
Number of properties acquired	50
Noncontrolling Interest [Member]	'
Real Estate Properties [Line Items]	'
Acquisition related gain	$63.10	[1]
[1]	$63.1 million was allocated to noncontrolling interest expense for the portion the acquisition related gain that relates to our equity partners ownership in the properties.

Real_Estate_and_InPlace_Lease_6

Real Estate and In-Place Lease Value (Schedule of Pro Forma Information) (Details) (USD $)	3 Months Ended				9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Business Acquisition [Line Items]	'		'		'		'
Pro forma revenues	$127.60		$96.60		$379.30		$281.80
Pro forma net income (loss) attributable to Kennedy-Wilson Holdings, Inc. common shareholders	-1.1	[1]	-12.1	[1]	-32.6	[1]	-21.7	[1]
Earnings Per Share, Pro Forma [Abstract]	'		'		'		'
Basic (in dollars per share)	($0.01)		($0.17)		($0.37)		($0.32)
Diluted (in dollars per share)	($0.01)		($0.17)		($0.37)		($0.32)
2013 Acquisitions [Member]	'		'		'		'
Business Acquisition [Line Items]	'		'		'		'
Pro forma income from unconsolidated investments	$9.80		($0.90)		$35.80		($3.40)
[1]	Excludes the effects of acquisition-related gains.

Unconsolidated_Investments_Nar

Unconsolidated Investments (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Mar. 31, 2014	Jun. 30, 2014
			JointVenture			Performance Guarantee [Member]	Minimum [Member]	Maximum [Member]	Europe [Member]	KW Residential, LLC [Member]
						Loans Payable [Member]			Investment	ApartmentBuildling
										apartment_unit
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'	'	'	'	'
Equity method investment, ownership percentage	'	'	'	'	'	'	5.00%	50.00%	'	41.00%
Investments in joint ventures	$447.40	'	$447.40	'	$751.40	'	'	'	'	'
Number of properties in portfolio	'	'	'	'	'	'	'	'	'	50
Number of units in portfolio	'	'	'	'	'	'	'	'	'	2,400
Unconsolidated investments	504.9	'	504.9	'	786.1	'	'	'	'	'
Foreign currency exchange gain (loss)	-2.9	2.1	-2.5	-2.9	'	'	'	'	'	'
Equity method investment, number of investments amended	'	'	'	'	'	'	'	'	6	'
Payments to acquire equity method investment	'	'	114.5	'	'	'	'	'	'	'
Contributions to acquire interest in joint venture	'	'	36.3	'	'	'	'	'	'	'
Proceeds from equity method investments	'	'	178.2	'	'	'	'	'	'	'
Unfulfilled capital commitments	'	'	34.5	'	'	'	'	'	'	'
Unfulfilled capital commitments, number with unfulfilled capital commitments	'	'	5	'	'	'	'	'	'	'
Guarantor obligations, maximum exposure	'	'	'	'	'	54.9	'	'	'	'
Guarantor obligations, maximum exposure, percentage of property level debt	'	'	'	'	'	1.00%	'	'	'	'
Investments in loan pool participations	$57.50	'	$57.50	'	$34.70	'	'	'	'	'

Unconsolidated_Investments_Sch

Unconsolidated Investments (Schedule of Unconsolidated Investments) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Equity Method Investments and Joint Ventures [Abstract]	'	'
Investments in joint ventures	$447.40	$751.40
Investments in loan pool participations	57.5	34.7
Total	$504.90	$786.10

Unconsolidated_Investments_Sch1

Unconsolidated Investments (Schedule of Joint Ventures) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	$447.40	$751.40
Western United States	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	368.7	400.6
Japan	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	'	68.8
United Kingdom	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	37	110.8
Ireland	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	'	144.3
Spain	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	27	26.9
Other	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	14.7	'
Multifamily [Member]	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	145.4	250.3
Multifamily [Member] | Western United States	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	145.2	133.3
Multifamily [Member] | Japan	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	'	68.8
Multifamily [Member] | United Kingdom	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	0	0
Multifamily [Member] | Ireland	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	'	48.2
Multifamily [Member] | Spain	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	0	0
Multifamily [Member] | Other	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	0.2	'
Commercial [Member]	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	147.8	360.9
Commercial [Member] | Western United States	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	105.8	160.3
Commercial [Member] | Japan	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	'	0
Commercial [Member] | United Kingdom	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	37	104.5
Commercial [Member] | Ireland	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	'	96.1
Commercial [Member] | Spain	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	0	0
Commercial [Member] | Other	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	5	'
Loan [Member]	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	50.1	56.6
Loan [Member] | Western United States	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	50.1	50.3
Loan [Member] | Japan	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	'	0
Loan [Member] | United Kingdom	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	0	6.3
Loan [Member] | Ireland	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	'	0
Loan [Member] | Spain	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	0	0
Loan [Member] | Other	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	0	'
Residential [Member]	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	67.8	48.7
Residential [Member] | Western United States	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	67.6	48.7
Residential [Member] | Japan	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	'	0
Residential [Member] | United Kingdom	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	0	0
Residential [Member] | Ireland	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	'	0
Residential [Member] | Spain	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	0	0
Residential [Member] | Other	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	0.2	'
Other [Member]	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	36.3	34.9
Other [Member] | Western United States	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	0	8
Other [Member] | Japan	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	'	0
Other [Member] | United Kingdom	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	0	0
Other [Member] | Ireland	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	'	0
Other [Member] | Spain	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	27	26.9
Other [Member] | Other	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in joint ventures	$9.30	'

Unconsolidated_Investments_Sch2

Unconsolidated Investments (Schedule of New Joint Venture Investments) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
	Property
Schedule of Equity Method Investments [Line Items]	'
Payments to acquire equity method investments, new investments	$78.20
No. of Properties	17
Multifamily [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Payments to acquire equity method investments, new investments	4
No. of Properties	1
Commercial [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Payments to acquire equity method investments, new investments	57.2
No. of Properties	14
Residential [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Payments to acquire equity method investments, new investments	17
No. of Properties	2
Western United States	'
Schedule of Equity Method Investments [Line Items]	'
Payments to acquire equity method investments, new investments	21
No. of Properties	3
Western United States | Multifamily [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Payments to acquire equity method investments, new investments	4
No. of Properties	1
Western United States | Commercial [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Payments to acquire equity method investments, new investments	0
No. of Properties	0
Western United States | Residential [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Payments to acquire equity method investments, new investments	17
No. of Properties	2
United Kingdom	'
Schedule of Equity Method Investments [Line Items]	'
Payments to acquire equity method investments, new investments	57.2	[1]
No. of Properties	14	[1]
United Kingdom | Multifamily [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Payments to acquire equity method investments, new investments	0	[1]
No. of Properties	0	[1]
United Kingdom | Commercial [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Payments to acquire equity method investments, new investments	57.2	[1]
No. of Properties	14	[1]
United Kingdom | Residential [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Payments to acquire equity method investments, new investments	$0	[1]
No. of Properties	0	[1]
[1]	Kennedy Wilson's contribution in a joint venture investment that was subsequently contributed into KWE as part of its initial investment. See note 1.

Unconsolidated_Investments_Cas

Unconsolidated Investments (Cash Distributions by Investment Type and Location) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	$78.90
Distributions from unconsolidated investments	99.3
Multifamily [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	8.7
Distributions from unconsolidated investments	1.5
Commercial [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	59.1
Distributions from unconsolidated investments	83.3
Residential [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	5.6
Distributions from unconsolidated investments	5.7
Loan Pool [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	5.5
Distributions from unconsolidated investments	8.8
Western United States	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	31.8
Distributions from unconsolidated investments	51.3
Western United States | Multifamily [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	7
Distributions from unconsolidated investments	1.5
Western United States | Commercial [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	18.9
Distributions from unconsolidated investments	42.6
Western United States | Residential [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	5.6
Distributions from unconsolidated investments	4.7
Western United States | Loan Pool [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0.3
Distributions from unconsolidated investments	2.5
Japan	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	1.7
Distributions from unconsolidated investments	0
Japan | Multifamily [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	1.7
Distributions from unconsolidated investments	0
Japan | Commercial [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0
Distributions from unconsolidated investments	0
Japan | Residential [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0
Distributions from unconsolidated investments	0
Japan | Loan Pool [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0
Distributions from unconsolidated investments	0
United Kingdom	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	14.2
Distributions from unconsolidated investments	16.7
United Kingdom | Multifamily [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0
Distributions from unconsolidated investments	0
United Kingdom | Commercial [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	9
Distributions from unconsolidated investments	10.4
United Kingdom | Residential [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0
Distributions from unconsolidated investments	0
United Kingdom | Loan Pool [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	5.2
Distributions from unconsolidated investments	6.3
Ireland	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	31.2
Distributions from unconsolidated investments	30.3
Ireland | Multifamily [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0
Distributions from unconsolidated investments	0
Ireland | Commercial [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	31.2
Distributions from unconsolidated investments	30.3
Ireland | Residential [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0
Distributions from unconsolidated investments	0
Ireland | Loan Pool [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0
Distributions from unconsolidated investments	0
Spain	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0
Distributions from unconsolidated investments	1
Spain | Multifamily [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0
Distributions from unconsolidated investments	0
Spain | Commercial [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0
Distributions from unconsolidated investments	0
Spain | Residential [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0
Distributions from unconsolidated investments	1
Spain | Loan Pool [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Operating distributions from unconsolidated investments	0
Distributions from unconsolidated investments	$0

Unconsolidated_Investments_Sch3

Unconsolidated Investments (Schedule of Investments in Loan Pools) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Initial Unpaid Principal Balance	$1,908.70	[1]	'
Unpaid Principal Balance	782.3	[1]	'
Kennedy Wilson Initial Equity Invested	119.2		'
Investment Balance at September 30, 2014	57.5		34.7
Expected Accretion Over Total Estimated Collection Period	24.9		'
Accreted to Date	15.8		'
February 2010 [Member] | U.S. Loan Pool 1 [Member] | Western United States	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Kennedy Wilson Ownership	15.00%	[2]	'
Initial Unpaid Principal Balance	342.4	[1],[2]	'
Unpaid Principal Balance	'	[1],[2]	'
Kennedy Wilson Initial Equity Invested	11.2	[2]	'
Investment Balance at September 30, 2014	0.5	[2]	'
Expected Accretion Over Total Estimated Collection Period	4.5	[2]	'
Accreted to Date	4.6	[2]	'
April 2012 [Member] | U.S. Loan Pool 2 [Member] | Western United States	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Kennedy Wilson Ownership	75.00%		'
Initial Unpaid Principal Balance	43.4	[1]	'
Unpaid Principal Balance	2.8	[1]	'
Kennedy Wilson Initial Equity Invested	30.9		'
Investment Balance at September 30, 2014	2.4		'
Expected Accretion Over Total Estimated Collection Period	4.3		'
Accreted to Date	4		'
August 2012 [Member] | Irish Loan Pool 1 [Member] | Ireland	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Kennedy Wilson Ownership	10.00%		'
Initial Unpaid Principal Balance	458	[1]	'
Unpaid Principal Balance	324.3	[1]	'
Kennedy Wilson Initial Equity Invested	7		'
Investment Balance at September 30, 2014	8.5		'
Expected Accretion Over Total Estimated Collection Period	1.8		'
Accreted to Date	1.3		'
December 2012 [Member] | UK Loan Pool 1 [Member] | United Kingdom	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Kennedy Wilson Ownership	5.00%		'
Initial Unpaid Principal Balance	631.2	[1]	'
Unpaid Principal Balance	104.9	[1]	'
Kennedy Wilson Initial Equity Invested	19.3		'
Investment Balance at September 30, 2014	2.8		'
Expected Accretion Over Total Estimated Collection Period	2.2		'
Accreted to Date	2		'
April 2013 [Member] | UK Loan Pool 3 [Member] | United Kingdom	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Kennedy Wilson Ownership	10.00%		'
Initial Unpaid Principal Balance	189.2	[1]	'
Unpaid Principal Balance	105.8	[1]	'
Kennedy Wilson Initial Equity Invested	13		'
Investment Balance at September 30, 2014	5.8		'
Expected Accretion Over Total Estimated Collection Period	5.1		'
Accreted to Date	1.7		'
August 2013 [Member] | UK Loan Pool 3 [Member] | United Kingdom	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Kennedy Wilson Ownership	20.00%		'
Initial Unpaid Principal Balance	138.7	[1]	'
Unpaid Principal Balance	138.7	[1]	'
Kennedy Wilson Initial Equity Invested	7.5		'
Investment Balance at September 30, 2014	8.5		'
Expected Accretion Over Total Estimated Collection Period	4.7		'
Accreted to Date	1.6		'
May 2014 [Member] | UK Loan Pool 4 [Member] | United Kingdom	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Kennedy Wilson Ownership	4.40%	[3]	'
Initial Unpaid Principal Balance	105.8	[1],[3]	'
Unpaid Principal Balance	105.8	[1],[3]	'
Kennedy Wilson Initial Equity Invested	30.3	[3]	'
Investment Balance at September 30, 2014	29	[3]	'
Expected Accretion Over Total Estimated Collection Period	2.3	[3]	'
Accreted to Date	$0.60	[3]	'
United Kingdom, Pounds	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Foreign currency exchange rate	0.62		'
Euro Member Countries, Euro	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Foreign currency exchange rate	0.79		'
KWE [Member]	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Ownership percentage by parent	13.30%		'
[1]	Estimated foreign exchange rate is £0.62=1 USD and €0.79 =1 USD as of September 30, 2014.
[2]	Equity invested represents guarantee claims against note holders in loan pool.
[3]	This loan portfolio was directly acquired and held by KWE. Kennedy Wilson owns approximately 13.3% of the total issued share capital of KWE.

Unconsolidated_Investments_Sch4

Unconsolidated Investments (Schedule of Interest Income and Foreign Currency Gain) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Equity Method Investments and Joint Ventures [Abstract]	'	'	'	'
Income from unconsolidated investments - loan pools	$2.30	$3.70	$7	$9.10
Unrealized foreign currency translation (loss) gain	-2.9	2.1	-2.5	-2.9
Total	($0.60)	$5.80	$4.50	$6.20

Fair_Value_Measurements_Schedu

Fair Value Measurements (Schedule of Fair Value Measurements) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Unconsolidated investments	$90.40		$81.10
Derivative contract	25.3	[1]	'
Investments in KWE	0		0
Recurring [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Marketable securities	13.6		4
Unconsolidated investments	90.4		81.1
Assets (liabilities), fair value disclosure	129.3		75.5
Recurring [Member] | Foreign Exchange Forward [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative contract	22.7		-9.6
Recurring [Member] | Foreign Exchange Option [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative contract	2.6		'
Recurring [Member] | Level 1 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Marketable securities	13.6		4
Unconsolidated investments	0		'
Assets (liabilities), fair value disclosure	13.6		4
Recurring [Member] | Level 1 [Member] | Foreign Exchange Forward [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative contract	0		'
Recurring [Member] | Level 1 [Member] | Foreign Exchange Option [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative contract	0		'
Recurring [Member] | Level 2 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Marketable securities	0		'
Unconsolidated investments	0		'
Assets (liabilities), fair value disclosure	25.3		-9.6
Recurring [Member] | Level 2 [Member] | Foreign Exchange Forward [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative contract	22.7		-9.6
Recurring [Member] | Level 2 [Member] | Foreign Exchange Option [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative contract	2.6		'
Recurring [Member] | Level 3 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Marketable securities	0		'
Unconsolidated investments	90.4		81.1
Assets (liabilities), fair value disclosure	90.4		81.1
Recurring [Member] | Level 3 [Member] | Foreign Exchange Forward [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative contract	0		'
Recurring [Member] | Level 3 [Member] | Foreign Exchange Option [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative contract	0		'
KWE [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Shares in KWE	13.3		'
Marketable Securities [Member] | KWE [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Investments in KWE	$234		'
[1]	Hedges are presented gross in the consolidated balance sheet. Hedge assets are included in other assets and hedge liabilities are included in other liabilities.

Fair_Value_Measurements_Invest

Fair Value Measurements (Investments in Joint Ventures) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Unconsolidated investments	$90.40	$81.10
Equity Method Investments [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Fair value option, number of investments	3	2
FV Option	62.7	47.6
Equity Method Investments [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
The funds, unfunded commitments	4.2	'
Funds	$27.70	$33.50

Fair_Value_Measurements_Schedu1

Fair Value Measurements (Schedule of Changes in Level 3 Investments) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Beginning balance	$78.50	$74	$81.10	$68.40
Contributions	16.9	1	19.3	6.9
Distributions	-5	-0.8	-10	-1.1
Ending balance	$90.40	$74.20	$90.40	$74.20

Fair_Value_Measurements_Schedu2

Fair Value Measurements (Schedule of Significant Inputs) (Details)	9 Months Ended
	Sep. 30, 2014
Minimum [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Entity Credit Risk	0.76%
Maximum [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Entity Credit Risk	12.00%
Office [Member] | Minimum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Capitalization Rates	6.00%
Discount Rates	7.00%
Office [Member] | Maximum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Capitalization Rates	7.50%
Discount Rates	9.75%
Retail [Member] | Minimum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Capitalization Rates	6.00%
Discount Rates	9.00%
Retail [Member] | Maximum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Capitalization Rates	10.00%
Discount Rates	12.00%
Hotel [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Capitalization Rates	6.50%
Hotel [Member] | Minimum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Discount Rates	7.50%
Hotel [Member] | Maximum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Discount Rates	8.00%
Multifamily [Member] | Minimum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Capitalization Rates	4.40%
Discount Rates	4.90%
Multifamily [Member] | Maximum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Capitalization Rates	6.75%
Discount Rates	9.00%
Loans [Member] | Minimum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Discount Rates	1.75%
Loans [Member] | Maximum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Discount Rates	12.00%
Land and condominium units [Member] | Minimum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Discount Rates	8.00%
Land and condominium units [Member] | Maximum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Discount Rates	12.00%

Fair_Value_Measurements_Deriva

Fair Value Measurements (Derivatives Financial Instruments) (Details)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

USD ($)

USD ($)

Other Comprehensive Income (Loss) [Member]

Other Comprehensive Income (Loss) [Member]

Euro Member Countries, Euro

Euro Member Countries, Euro

Euro Member Countries, Euro

Euro Member Countries, Euro

Euro Member Countries, Euro

Euro Member Countries, Euro

United Kingdom, Pounds

United Kingdom, Pounds

United Kingdom, Pounds

United Kingdom, Pounds

United Kingdom, Pounds

United Kingdom, Pounds

KWE [Member]

KWE [Member]

KWE [Member]

KWE [Member]

KWE [Member]

KWE [Member]

KW Residential, LLC [Member]

KW Residential, LLC [Member]

KW Residential, LLC [Member]

KW Residential, LLC [Member]

KW Residential, LLC [Member]

KW Residential, LLC [Member]

KW Residential, LLC [Member]

KW Residential, LLC [Member]

KW Residential, LLC [Member]

KW Residential, LLC [Member]

USD ($)

USD ($)

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Minimum [Member]

Maximum [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Minimum [Member]

Maximum [Member]

Euro Member Countries, Euro

Euro Member Countries, Euro

Euro Member Countries, Euro

Euro Member Countries, Euro

Euro Member Countries, Euro

Euro Member Countries, Euro

Japan, Yen

Japan, Yen

Japan, Yen

Japan, Yen

Japan, Yen

Japan, Yen

Japan, Yen

Japan, Yen

Japan, Yen

Japan, Yen

USD ($)

EUR (€)

Other Comprehensive Income (Loss) [Member]

Other Comprehensive Income (Loss) [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

USD ($)

GBP (£)

Other Comprehensive Income (Loss) [Member]

Other Comprehensive Income (Loss) [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Minimum [Member]

Maximum [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Option [Member]

Foreign Exchange Option [Member]

Foreign Exchange Option [Member]

Foreign Exchange Option [Member]

Minimum [Member]

Maximum [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

Other Comprehensive Income (Loss) [Member]

Other Comprehensive Income (Loss) [Member]

Foreign Exchange Forward [Member]

Foreign Exchange Forward [Member]

USD ($)

JPY (¥)

Other Comprehensive Income (Loss) [Member]

Other Comprehensive Income (Loss) [Member]

USD ($)

JPY (¥)

Other Comprehensive Income (Loss) [Member]

Other Comprehensive Income (Loss) [Member]

Foreign Exchange Option [Member]

Foreign Exchange Option [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Derivative [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notional Amount

'

'

'

'

'

€ 93.50

'

'

'

'

'

£ 95.5

'

'

'

'

'

€ 185

[1]

'

'

'

'

'

¥ 7,500

[2]

'

'

'

¥ 10,953

[2],[3]

'

'

'

'

Forward Rate/Strike Price

'

'

'

'

'

'

'

'

1.24

1.4471

'

'

'

'

1.6356

1.6491

'

'

'

'

0.8021

[1]

0.8621

[1]

91.645

[2]

91.645

[2]

'

'

'

'

'

'

108.45

[2],[3]

110.62

[2],[3]

Fair Value

25.3

[4]

25.3

[4]

'

'

3.7

'

'

'

'

'

1.6

'

'

'

'

'

4.7

[1]

'

'

'

'

'

12.7

[2]

'

'

'

2.6

[2],[3]

'

'

'

'

'

Change in Unrealized Gains (Losses)

'

'

28.5

[4]

24.6

[4]

'

'

9

9.1

'

'

'

'

4.4

1.6

'

'

'

'

6

[1]

4.8

[1]

'

'

'

'

8.7

[2]

8.7

[2]

'

'

0.4

[2],[3]

0.4

[2],[3]

'

'

Gain (Loss) on Fair Value Hedges Recognized in Earnings

$0.10

$0.10

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

Hedge is held by KWE on its wholly-owned subsidiaries

[2]

Hedge is held by KWR on its wholly-owned subsidiaries

[3]

For the three and nine months ended SeptemberB 30, 2014, $0.1 million recognized through results of operations due to portion of hedge not designated as a net investment hedge

[4]

Hedges are presented gross in the consolidated balance sheet. Hedge assets are included in other assets and hedge liabilities are included in other liabilities.

Fair_Value_Measurements_Fair_V

Fair Value Measurements (Fair Value of Financial Instruments) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]	'	'
Long-term debt fair value	$2,794.50	$878.20
Long-term debt	$2,755.70	$850.80

Other_Assets_Details

Other Assets (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Other Assets [Abstract]	'		'
Deposits and other, net of accumulated amortization of $1.7 million and $1.2 million at September 30, 2014 and December 31, 2013, respectively	$22.60		$13
Loan fees, net of accumulated amortization of $7.9 million and $4.5 million at September 30, 2014 and December 31, 2013, respectively	33.9		14.1
Hedge Assets	25.3		0
Goodwill	23.9		23.9
Marketable securities	13.6	[1]	4	[1]
Prepaid expenses	12.7		7.6
Other Assets	232.3		73
Accumulated amortization, deposits and other	1.7		1.2
Accumulated amortization, loan fees	7.9		4.5
Investments in KWE	0		0
KWE [Member]	'		'
Other Assets [Abstract]	'		'
Shares in KWE	13.3		'
KWE [Member] | Marketable Securities [Member]	'		'
Other Assets [Abstract]	'		'
Investments in KWE	234		'
Furniture and Fixtures [Member]	'		'
Other Assets [Abstract]	'		'
Office furniture and equipment net of accumulated depreciation of $4.4 million and $2.2 million at September 30, 2014 and December 31, 2013, respectively	21.4		10.4
Accumulated amortization, office furniture and equipment	4.4		2.2
Above Market Leases [Member]	'		'
Other Assets [Abstract]	'		'
Above-market leases, net of accumulated amortization of $4.0 million at September 30, 2014	78.9		0
Accumulated amortization, above-market leases	$4		'
[1]	The amount above excludes Kennedy Wilson's 13.3 million shares in KWE as the investment is eliminated due to the consolidation of KWE's results. Based on the closing price of KWE shares on SeptemberB 30, 2014, the fair value of Kennedy Wilson's investment in KWE is $234.0 million.

Investment_Debt_Details

Investment Debt (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
	Investment
	acquisition
	Loan
Debt Instrument [Line Items]	'		'
Long-term debt	$2,755.70		$850.80
Percent of debt with fixed rate	54.00%		86.00%
Percent of debt with floating rate with interest caps	32.00%		7.00%
Percent of debt with floating rate without interest caps	14.00%		7.00%
Number of loans	19		'
Number of acquisitions partially financed with mortgages	12		'
Number of investments partially financed with mortgages	2		'
Mortgage Loans and Notes Payable [Member]	'		'
Debt Instrument [Line Items]	'		'
Long-term debt	2,049.80		'
Debt unamortized premium	21.3		'
Mortgage Loans Payable [Member]	'		'
Debt Instrument [Line Items]	'		'
Long-term debt	2,049.80	[1],[2]	401.8	[1],[2]
Debt unamortized premium	21.3		5.3
Weighted average interest rate	3.29%		4.13%
Mortgage Loans Payable [Member] | Western United States | Mortgage Loans Secured by Multi-Family Properties [Member]	'		'
Debt Instrument [Line Items]	'		'
Long-term debt	449.1	[2]	261	[2]
Mortgage Loans Payable [Member] | Western United States | Mortgage Loans Secured by Commerical Buildings [Member]	'		'
Debt Instrument [Line Items]	'		'
Long-term debt	133.6	[2]	110.4	[2]
Mortgage Loans Payable [Member] | Western United States | Mortgage Loans Secured by Hotels [Member]	'		'
Debt Instrument [Line Items]	'		'
Long-term debt	36.4	[2]	28	[2]
Mortgage Loans Payable [Member] | Japan | Mortgage Loans Secured by Multi-Family Properties [Member]	'		'
Debt Instrument [Line Items]	'		'
Long-term debt	262.4	[2]	0	[2]
Mortgage Loans Payable [Member] | Japan | Mortgage Loans Secured by Commerical Buildings [Member]	'		'
Debt Instrument [Line Items]	'		'
Long-term debt	2.4	[2]	2.4	[2]
Mortgage Loans Payable [Member] | Ireland | Mortgage Loans Secured by Multi-Family Properties [Member]	'		'
Debt Instrument [Line Items]	'		'
Long-term debt	173.3	[2],[3]	0	[2],[3]
Mortgage Loans Payable [Member] | Ireland | Mortgage Loans Secured by Commerical Buildings [Member]	'		'
Debt Instrument [Line Items]	'		'
Long-term debt	320.5	[2]	0	[2]
Mortgage Loans Payable [Member] | Ireland | Mortgage Loans Secured by Hotels [Member]	'		'
Debt Instrument [Line Items]	'		'
Long-term debt	76.1	[2]	0	[2]
Mortgage Loans Payable [Member] | United Kingdom | Mortgage Loans Secured by Commerical Buildings [Member]	'		'
Debt Instrument [Line Items]	'		'
Long-term debt	596	[2],[4]	0	[2],[4]
KWE [Member]	'		'
Debt Instrument [Line Items]	'		'
Ownership percentage by parent	13.30%		'
KWE [Member] | Mortgage Loans Payable [Member] | Ireland | Mortgage Loans Secured by Multi-Family Properties [Member]	'		'
Debt Instrument [Line Items]	'		'
Long-term debt	60.2	[2],[3]	'
KWE [Member] | Mortgage Loans Payable [Member] | United Kingdom | Mortgage Loans Secured by Commerical Buildings [Member]	'		'
Debt Instrument [Line Items]	'		'
Long-term debt	$757.50	[2],[4]	'
[1]	The investment debt had a weighted average interest rate of 3.29% and 4.13% per annum at SeptemberB 30, 2014 and DecemberB 31, 2013. As of SeptemberB 30, 2014, 54% of our property level debt is fixed rate, 32% is floating rate with interest caps and 14% is floating rate without interest caps. As ofB DecemberB 31, 2013,B 86%B of our property level debt is fixed rate,B 7%B is floating rate with interest caps andB 7%B is floating rate without interest caps.
[2]	The investment debt balances include the unamortized debt premiums. Debt premiums represent the excess of the fair value of debt over the principal value of debt assumed in various acquisitions and are amortized into interest expense over the remaining term of the related debt in a manner that approximates the effective interest method. The unamortized loan premium as of SeptemberB 30, 2014 and DecemberB 31, 2013 was $21.3 million and $5.3 million, respectively.
[3]	Includes $60.2 million of investment debt on properties that were directly acquired and held by KWE. Kennedy Wilson owns approximately 13.3% of the total issued share capital of KWE.
[4]	Includes $757.5 million of investment debt on properties that were directly acquired and held by KWE. Kennedy Wilson owns approximately 13.3% of the total issued share capital of KWE.

Investment_Debt_Schedule_of_Ma

Investment Debt (Schedule of Maturities) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Debt Instrument [Line Items]	'	'
Carrying Value	$2,755.70	$850.80
Mortgage Loans and Notes Payable [Member]	'	'
Debt Instrument [Line Items]	'	'
2014	7.4	'
2015	124.1	'
2015	60.8	'
2016	206.1	'
2017	330.3	'
Thereafter	1,299.80	'
Long-term debt gross	2,028.50	'
Debt premium	21.3	'
Carrying Value	$2,049.80	'

Senior_Notes_Narrative_Details

Senior Notes (Narrative) (Details) (Senior Notes [Member], USD $)	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]	'	'	'
Face Value	$705,000,000	'	$405,000,000
Balance sheet leverage ratio	0.74	'	'
Maximum [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Balance sheet leverage ratio	1.5	'	'
5.875% Senior Notes Dues April 2024 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Face Value	$300,000,000	$300,000,000	$0
Interest Rate	5.88%	5.88%	'
Public offering price percentage of principal amount	'	99.07%	'

Senior_Notes_Schedule_of_Senio

Senior Notes (Schedule of Senior Notes) (Details) (USD $)	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]	'	'	'
Carrying Value	$2,755,700,000	'	$850,800,000
Senior Notes [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Face Value	705,000,000	'	405,000,000
Unamortized Net Premium/(Discount)	900,000	'	4,000,000
Carrying Value	705,900,000	'	409,000,000
Senior Notes [Member] | 7.75% Senior Notes Due 2042 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Interest Rate	7.75%	'	'
Face Value	55,000,000	'	55,000,000
Unamortized Net Premium/(Discount)	0	'	0
Carrying Value	55,000,000	'	55,000,000
Senior Notes [Member] | 5.875% Senior Notes Dues April 2024 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Interest Rate	5.88%	5.88%	'
Face Value	300,000,000	300,000,000	0
Unamortized Net Premium/(Discount)	-2,700,000	'	0
Carrying Value	297,300,000	'	0
Senior Notes [Member] | 8.75% Senior Notes, Due 2019 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Interest Rate	8.75%	'	'
Face Value	350,000,000	'	350,000,000
Unamortized Net Premium/(Discount)	3,600,000	'	4,000,000
Carrying Value	$353,600,000	'	$354,000,000

Line_of_Credit_Details

Line of Credit (Details)	9 Months Ended						9 Months Ended	1 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Jul. 31, 2014	Jun. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014
	USD ($)	USD ($)	KWF Facility [Member]	KWF Facility [Member]	KWF Facility [Member]	KWF Facility [Member]	KWF Facility [Member]	KWE Facility [Member]	KWE Facility [Member]
			Unsecured Debt [Member]	Unsecured Debt [Member]	Unsecured Debt [Member]	Unsecured Debt [Member]	Unsecured Debt [Member]	Unsecured Debt [Member]	Unsecured Debt [Member]
			U.S. Bank, East-West Bank and Bank of Ireland [Member]	U.S. Bank, East-West Bank and Bank of Ireland [Member]	U.S. Bank, East-West Bank and Bank of Ireland [Member]	U.S. Bank, East-West Bank and Bank of Ireland [Member]	U.S. Bank, East-West Bank and Bank of Ireland [Member]	Revolving Credit Facility [Member]	Revolving Credit Facility [Member]
			Revolving Credit Facility [Member]	Revolving Credit Facility [Member]	Revolving Credit Facility [Member]	Revolving Credit Facility [Member]	Revolving Credit Facility [Member]	USD ($)	GBP (£)
			USD ($)	USD ($)	USD ($)	Minimum [Member]	LIBOR [Member]
						USD ($)
Line of Credit Facility [Line Items]	'	'	'	'	'	'	'	'	'
Basis spread on variable rate	'	'	'	'	'	'	2.75%	'	'
Maximum borrowing capacity	'	'	'	$300,000,000	$140,000,000	'	'	$365,000,000	£ 225,000,000
Rent adjusted fixed charge coverage ratio	'	'	3.54	'	'	1.5	'	'	'
Balance sheet leverage ratio	'	'	0.79	'	'	1.5	'	'	'
Covenant, tangible net worth	'	'	897,600,000	'	'	500,000,000	'	'	'
Covenant, percent of new equity offerings	'	'	50.00%	'	'	'	'	'	'
Line of credit facility covenant compliance minimum requirement of unrestricted cash and cash equivalents	'	'	'	'	'	40,000,000	'	'	'
Cash and cash equivalents and marketable securities	'	'	800,600,000	'	'	'	'	'	'
Borrowings under line of credit	90,000,000	125,000,000	90,000,000	'	'	'	'	'	'
Maximum amount drawn on the unsecured credit facility at any one point	'	'	90,000,000	'	'	'	'	'	'
Remaining borrowing capacity	'	'	300,000,000	'	'	'	'	'	'
Debt instrument term	'	'	'	'	'	'	'	'3 years	'3 years
Covenant, maximum consolidated leverage ratio	'	'	'	'	'	'	'	60.00%	60.00%
Covenant, minimum net asset value	'	'	'	'	'	'	'	'	£ 744,400,000
Covenant, percent of cash proceeds received by subsidiaries	'	'	'	'	'	'	'	75.00%	75.00%
Covenant, fixed charge coverage ratio	'	'	'	'	'	'	'	1.5	1.5
Covenant, minimum unsecured interest	'	'	'	'	'	'	'	1.9	1.9
Covenant, maximum secured recourse indebtedness	'	'	'	'	'	'	'	2.50%	2.50%

Junior_Subordinated_Debentures1

Junior Subordinated Debentures (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014
			Junior Subordinated Debentures [Member]
Debt Instrument [Line Items]	'	'	'
Junior subordinated debentures	$0	$40,000,000	$40,000,000
Extinguishment of debt amount	'	'	41,500,000
Loss on extinguishment of debt	'	'	$1,500,000

Stockholders_Equity_Common_Sto

Stockholders Equity (Common Stock) (Details) (USD $)	1 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Jan. 31, 2014	Sep. 30, 2014	Sep. 30, 2013
Equity [Abstract]	'	'	'
Issuance of common stock	9.2	'	'
Proceeds from issuance of common stock	$190.60	$190.60	$276

Stockholders_Equity_Dividend_D

Stockholders Equity (Dividend Distributions) (Details) (USD $)	9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013
Dividends Payable [Line Items]	'		'
Preferred Stock, Declared	$6.10		$6.10
Common stock, Declared	25	[1]	16	[1]
Total, Declared	31.1	[2]	22.1	[2]
Preferred Stock, Paid	6.1		6.1
Common Stock, Paid	22.3	[1]	10.2	[1]
Total, Paid	28.4	[2]	16.3	[2]
Common Stock, Par or Stated Value Per Share	$0.00		'
Common Stock, Shares Authorized	200,000,000		125,000,000
Cumulative preferred stock subject to mandatory redemption SeriesA [Member]	'		'
Dividends Payable [Line Items]	'		'
Preferred Stock, Dividend Rate, Percentage	6.00%		'
Preferred Stock, Shares Issued	100,000		100,000
Preferred Stock, Shares Outstanding	100,000		100,000
Cumulative preferred stock subject to mandatory redemption Series B [Member]	'		'
Dividends Payable [Line Items]	'		'
Preferred Stock, Dividend Rate, Percentage	6.45%		'
Preferred Stock, Shares Issued	32,550		32,550
Preferred Stock, Shares Outstanding	32,550		32,550
Series A Preferred Stock [Member]	'		'
Dividends Payable [Line Items]	'		'
Preferred Stock, Declared	4.5	[3]	4.5	[3]
Preferred Stock, Paid	4.5	[3]	4.5	[3]
Series B Preferred Stock [Member]	'		'
Dividends Payable [Line Items]	'		'
Preferred Stock, Declared	1.6	[4]	1.6	[4]
Preferred Stock, Paid	$1.60	[4]	$1.60	[4]
[1]	$0.0001 par value per share, 200,000,000 and 125,000,000 shares authorized as of SeptemberB 30, 2014 and 2013, respectively.
[2]	Common stock dividends were declared at the end of each quarter and paid in the following quarter. The amount declared and not paid is accrued on the consolidated balance sheet.
[3]	6.00% Series A, 100,000 shares issued and outstanding as of SeptemberB 30, 2014 and 2013, mandatorily convertible on May 19, 2015, or earlier at the option of the holders thereof.
[4]	6.45% Series B, 32,550 shares issued and outstanding as of SeptemberB 30, 2014 and 2013, mandatorily convertible on November 3, 2018, or earlier at the option of the holders thereof, or, in certain circumstances, at our election on or after May 3, 2017.

Stockholders_Equity_Stock_Comp

Stockholders Equity (Stock Compensation) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Equity [Abstract]	'	'	'	'
Share-based compensation expense	$5.30	$2	$8.70	$5.40
Common stock issued under Amended and Restated 2009 Equity Participation Plan (in shares)	3,140,000	'	'	'

Stockholders_Equity_Accumulate

Stockholders Equity (Accumulated Other Comprehensive Income) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'
Balance at December 31, 2013	$9.20
Unrealized gains (losses), arising during the period	-85.1
Amounts reclassified out of AOCI during the period	-7.1	[1]
Taxes on unrealized gains (losses), arising during the period	33.4
Noncontrolling interest	36.4
Balance at September 30, 2014	-13.2
Foreign Currency Translation [Member]	'
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'
Balance at December 31, 2013	4.3
Unrealized gains (losses), arising during the period	-107.5
Amounts reclassified out of AOCI during the period	-0.3	[1]
Taxes on unrealized gains (losses), arising during the period	40.4
Noncontrolling interest	36.4
Balance at September 30, 2014	-26.7
Forward Contract Foreign Currency [Member]	'
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'
Balance at December 31, 2013	4.9
Unrealized gains (losses), arising during the period	24.3
Amounts reclassified out of AOCI during the period	-6.8	[1]
Taxes on unrealized gains (losses), arising during the period	-7.8
Noncontrolling interest	0
Balance at September 30, 2014	14.6
Marketable Securities [Member]	'
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'
Balance at December 31, 2013	0
Unrealized gains (losses), arising during the period	-1.9
Amounts reclassified out of AOCI during the period	0	[1]
Taxes on unrealized gains (losses), arising during the period	0.8
Noncontrolling interest	0
Balance at September 30, 2014	($1.10)
[1]	Amounts reclassified out of accumulated other comprehensive income relate to the consolidation of investments previously accounted for under the equity method. Pursuant to FASB ASC 805-10, Business Combinations, these amounts are included in the calculation of gain or loss as of the acquisition date. Please refer to Note 4 - Real Estate for further discussion on consolidated acquisitions.

Stockholders_Equity_Noncontrol

Stockholders' Equity (Noncontrolling Interests) (Details) (USD $)	0 Months Ended	9 Months Ended		9 Months Ended			1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013	Feb. 28, 2014	Sep. 30, 2014	Feb. 28, 2014	Sep. 30, 2014
	JointVenture	JointVenture		KWE [Member]	Noncontrolling Interest [Member]	Noncontrolling Interest [Member]	Noncontrolling Interest [Member]	Noncontrolling Interest [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]
							KWE [Member]	KWE [Member]	KWE [Member]	KWE [Member]
Noncontrolling Interest [Line Items]	'	'	'	'	'	'	'	'	'	'
Noncontrolling interests	'	$1,748.40	$50.60	'	$1,748.40	$50.60	'	'	'	'
Ownership percentage by parent	'	'	'	13.30%	'	'	'	'	'	'
Contributions from noncontrolling interests	'	12.9	'	1,404.20	12.9	'	1,410.70	1,410.70	6.5	-6.5
Number of joint venture investments consolidated	6	7	'	'	'	'	'	'	'	'
Consolidation of noncontrolling interests (Note 4)	'	$291.80	'	'	$291.80	'	'	'	'	'

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended				9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Earnings Per Share [Abstract]	'		'		'		'
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	($2.20)		($4.10)		$44.60		($10.20)
Net income and dividends allocated to participating securities	-0.5		0		-2.6		0
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders, net of allocation to participating securities	-2.7		-4.1		42		-10.2
Dividends declared on common shares	-8.1		-15.2		-24.1		-5.5
Undistributed (losses) earnings attributable to Kennedy-Wilson Holdings, Inc. common shareholders, net of allocation to participating securities	($10.80)		($19.30)		$17.90		($15.70)
Distributed earnings per share (in dollars per share)	$0.09		$0.07		$0.27		$0.21
Undistributed earnings per share (in dollars per share)	($0.12)		($0.13)		$0.20		($0.36)
Income (loss) per basic (in dollars per share)	($0.03)		($0.06)		$0.47		($0.15)
Income (loss) per diluted (in dollars per share)	($0.03)		($0.06)		$0.47		($0.15)
Weighted average shares outstanding for basic (in shares)	89,267,838		72,643,000		88,854,215		68,486,876
Weighted average shares outstanding for diluted (in shares)	89,267,838	[1]	72,643,000	[1]	90,169,008	[1]	68,486,876	[1]
Dividends declared per common share (in dollars per share)	$0.09		$0.07		$0.27		$0.21
Potentially dilutive securities (in shares)	12,993,531		19,315,303		'		19,620,824
[1]	For the three months ended September 30, 2014, a total of 12,993,531 potentially dilutive securities have not been included in the diluted weighted average shares as they are anti-dilutive. For the three and nine months ended September 30, 2013, a total of 19,315,303 and 19,620,824 potentially dilutive securities have not been included in the diluted weighted average shares as they are anti-dilutive. Potentially anti-dilutive securities include preferred stock, warrants, and unvested restricted stock grants.

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
					segment
Segment Reporting Information [Line Items]	'		'		'		'		'
Number of operating segments	'		'		2		'		'
Investment management, property services and research fees (includes $6.2, $15.7, $47.0, and $37.8 of related party fees)	$12.90		$20.90		$65		$54		'
Investment management, property services, and research feesb related party	6.2		15.7		47		37.8		'
Rental and hotel	93.5		10.5		161.3		27.3		'
Sales of real estate	1.6		1.6		19		10.1		'
Loans and other	5.7		0.5		11.7		1.4		'
Total revenue	113.7		33.5		257		92.8		'
Operating expenses	-79.5		-32.8		-196.2		-93		'
Depreciation and amortization	-34.7		-4.5		-67.3		-12		'
Total operating expenses	-114.2		-37.3		-263.5		-105		'
Income from unconsolidated investments	12.1		13.2		45.9		30.1		'
Operating income	11.6		9.4		39.4		17.9		'
Acquisition-related gains	28.9		1.6		199.2		11.1		'
Acquisition-related expenses	-5.3		0		-16.9		-0.5		'
Interest expense-investment	-13.8		-2.8		-30.2		-7.4		'
Interest expense - corporate	-15.9	[1]	-10.3	[1]	-41.1	[1]	-29.7	[1]	'
Other	-1.9		0.1		1		0.5		'
Income (loss) before (provision for) benefit from income taxes	3.6		-2		151.4		-8.1		'
(Provision for) benefit from income taxes	-6.6		-0.8		-40.8		1.4		'
Net income (loss)	-3		-2.8		110.6		-6.7		'
Net loss (income) attributable to the noncontrolling interests	2.8		0.7		-59.9		2.6		'
Preferred dividends and accretion of preferred stock issuance costs	-2		-2		-6.1		-6.1		'
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	-2.2		-4.1		44.6		-10.2		'
Total assets	5,713.30		'		5,713.30		'		1,798.80
Investments [Member]	'		'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'		'
Average ownership interest in investments	'		'		45.00%		'		'
Rental and hotel	93.5		10.5		161.3		27.3		'
Sales of real estate	1.6		1.6		19		10.1		'
Loans and other	5.7		0.5		11.7		1.4		'
Total revenue	100.8		12.6		192		38.8		'
Operating expenses	-55.2		-13.7		-130.2		-45		'
Depreciation and amortization	-34.7		-4.5		-67.3		-12		'
Income from unconsolidated investments	11.4		13.2		43.1		30.1		'
Operating income	22.3		7.6		37.6		11.9		'
Acquisition-related gains	28.9		1.6		199.2		11.1		'
Acquisition-related expenses	-5.3		0		-16.9		-0.5		'
Interest expense-investment	-13.8		-2.8		-30.2		-7.4		'
Other	-2.1		1		0.8		0.3		'
Net income (loss)	30		7.4		190.5		15.4		'
Net loss (income) attributable to the noncontrolling interests	0.1		0.7		-62.6		2.6		'
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	30.1		8.1		127.9		18		'
Total assets	5,381.70		'		5,381.70		'		1,607.50
Services [Member]	'		'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'		'
Area of real estate property	70,200,000		'		70,200,000		'		'
Number of offices	25		'		25		'		'
Investment management, property services and research fees (includes $6.2, $15.7, $47.0, and $37.8 of related party fees)	12.9		20.9		65		54		'
Investment management, property services, and research feesb related party	8.3		15.7		48.9		37.8		'
Total revenue	12.9		20.9		65		54		'
Operating expenses	-14.5		-13.3		-40.4		-31.5		'
Income from unconsolidated investments	0.7		0		2.8		0		'
Operating income	-0.9		7.6		27.4		22.5		'
Net loss (income) attributable to the noncontrolling interests	2.7		0		2.7		0		'
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	1.8		7.6		30.1		22.5		'
Total assets	49.4		'		49.4		'		49.3
Corporate [Member]	'		'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'		'
Operating expenses	-9.7		-5.8		-25.6		-16.5		'
Operating income	-9.7		-5.8		-25.6		-16.5		'
Interest expense - corporate	-15.9		-10.3		-41.1		-29.7		'
Other	0		0.1		0		0.2		'
Income (loss) before (provision for) benefit from income taxes	-25.6		-16		-66.7		-46		'
(Provision for) benefit from income taxes	-6.6		-0.8		-40.8		1.4		'
Net income (loss)	-32.2		-16.8		-107.5		-44.6		'
Preferred dividends and accretion of preferred stock issuance costs	-2		-2		-6.1		-6.1		'
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	-34.2		-18.8		-113.6		-50.7		'
Total assets	$282.20		'		$282.20		'		$142
[1]	Includes early extinguishment of corporate debt

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]	'	'	'	'	'	'
Book loss	($11.60)	($9.40)	($39.40)	($17.90)	'	'
US domestic taxes would be incurred if repatriated to the United States	2.8	'	2.8	'	'	'
Cash and Cash Equivalents, at Carrying Value	787	181.4	787	181.4	178.2	120.9
United Kingdom, Ireland, Spain and Jersey	'	'	'	'	'	'
Income Taxes [Line Items]	'	'	'	'	'	'
Book loss	'	'	9.6	'	'	'
United Kingdom and Ireland	'	'	'	'	'	'
Income Taxes [Line Items]	'	'	'	'	'	'
Cash and Cash Equivalents, at Carrying Value	550	'	550	'	'	'
Japan	'	'	'	'	'	'
Income Taxes [Line Items]	'	'	'	'	'	'
Cash and Cash Equivalents, at Carrying Value	21	'	21	'	'	'
U.S. Federal [Member]	'	'	'	'	'	'
Income Taxes [Line Items]	'	'	'	'	'	'
Federal statutory rate	'	'	34.00%	'	'	'
Foreign Tax Authority [Member] | Ireland	'	'	'	'	'	'
Income Taxes [Line Items]	'	'	'	'	'	'
Federal statutory rate	'	'	12.50%	'	'	'
Foreign Tax Authority [Member] | United Kingdom	'	'	'	'	'	'
Income Taxes [Line Items]	'	'	'	'	'	'
Federal statutory rate	'	'	21.00%	'	'	'
Foreign Tax Authority [Member] | Spain	'	'	'	'	'	'
Income Taxes [Line Items]	'	'	'	'	'	'
Federal statutory rate	'	'	30.00%	'	'	'
Foreign Tax Authority [Member] | JERSEY	'	'	'	'	'	'
Income Taxes [Line Items]	'	'	'	'	'	'
Federal statutory rate	'	'	0.00%	'	'	'
Income Tax (Expense) Benefit [Member] | United Kingdom and Ireland	'	'	'	'	'	'
Income Taxes [Line Items]	'	'	'	'	'	'
Foreign tax benefit	'	'	$0.50	'	'	'

Guarantor_and_NonGuarantor_Fin2

Guarantor and Non-Guarantor Financial Statements (Details)	9 Months Ended
	Sep. 30, 2014
Guarantor and Nonguarantor Financial Statements [Abstract]	'
Consoldiated Entity Ownership Percentage	100.00%

Guarantor_and_NonGuarantor_Fin3

Guarantor and Non-Guarantor Financial Statements (Balance Sheets) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Assets	'	'
Cash and cash equivalents	$236,300,000	$170,200,000
Cash held by consolidated investments (including $40.6 and $0 of restricted cash)	591,300,000	8,000,000
Accounts receivable	42,200,000	16,600,000
Intercompany receivables	'	0
Loans	266,700,000	56,800,000
Real estate and acquired in place lease values, net of accumulated depreciation	3,839,600,000	688,100,000
Unconsolidated investments	504,900,000	786,100,000
Other assets	232,300,000	73,000,000
Investments in and advances to consolidated subsidiaries	0	0
Total assets	5,713,300,000	1,798,800,000
Liabilities	'	'
Accounts payable, accrued expenses and other liabilities	253,800,000	129,100,000
Intercompany payables	'	0
Senior notes payable	705,900,000	409,000,000
Intercompany loans payable	'	0
Investment debt	2,049,800,000	401,800,000
Junior subordinated debentures	0	40,000,000
Total liabilities	3,009,500,000	979,900,000
Equity	'	'
Kennedy-Wilson Holdings, Inc. shareholders' equity	955,400,000	768,300,000
Noncontrolling interests	1,748,400,000	50,600,000
Total equity	2,703,800,000	818,900,000
Total liabilities and equity	5,713,300,000	1,798,800,000
Parent [Member]	'	'
Assets	'	'
Cash and cash equivalents	0	0
Cash held by consolidated investments (including $40.6 and $0 of restricted cash)	0	0
Accounts receivable	0	0
Intercompany receivables	'	0
Loans	0	0
Real estate and acquired in place lease values, net of accumulated depreciation	0	0
Unconsolidated investments	0	0
Other assets	0	0
Investments in and advances to consolidated subsidiaries	964,900,000	775,100,000
Total assets	964,900,000	775,100,000
Liabilities	'	'
Accounts payable, accrued expenses and other liabilities	9,500,000	6,800,000
Intercompany payables	'	0
Senior notes payable	0	0
Intercompany loans payable	'	0
Investment debt	0	0
Junior subordinated debentures	'	0
Total liabilities	9,500,000	6,800,000
Equity	'	'
Kennedy-Wilson Holdings, Inc. shareholders' equity	955,400,000	768,300,000
Noncontrolling interests	0	0
Total equity	955,400,000	768,300,000
Total liabilities and equity	964,900,000	775,100,000
Kennedy-Wilson, Inc. [Member]	'	'
Assets	'	'
Cash and cash equivalents	71,000,000	48,200,000
Cash held by consolidated investments (including $40.6 and $0 of restricted cash)	0	0
Accounts receivable	0	1,100,000
Intercompany receivables	'	9,000,000
Loans	38,400,000	59,700,000
Real estate and acquired in place lease values, net of accumulated depreciation	0	0
Unconsolidated investments	9,300,000	7,500,000
Other assets	29,100,000	20,900,000
Investments in and advances to consolidated subsidiaries	1,650,800,000	1,141,900,000
Total assets	1,798,600,000	1,288,300,000
Liabilities	'	'
Accounts payable, accrued expenses and other liabilities	127,800,000	64,200,000
Intercompany payables	'	0
Senior notes payable	705,900,000	409,000,000
Intercompany loans payable	'	0
Investment debt	0	0
Junior subordinated debentures	'	40,000,000
Total liabilities	833,700,000	513,200,000
Equity	'	'
Kennedy-Wilson Holdings, Inc. shareholders' equity	964,900,000	775,100,000
Noncontrolling interests	0	0
Total equity	964,900,000	775,100,000
Total liabilities and equity	1,798,600,000	1,288,300,000
Guarantor Subsidiaries [Member]	'	'
Assets	'	'
Cash and cash equivalents	46,800,000	77,200,000
Cash held by consolidated investments (including $40.6 and $0 of restricted cash)	0	0
Accounts receivable	21,200,000	7,000,000
Intercompany receivables	'	0
Loans	15,500,000	53,700,000
Real estate and acquired in place lease values, net of accumulated depreciation	345,400,000	145,300,000
Unconsolidated investments	334,500,000	598,000,000
Other assets	44,500,000	31,400,000
Investments in and advances to consolidated subsidiaries	1,061,300,000	326,600,000
Total assets	1,869,200,000	1,239,200,000
Liabilities	'	'
Accounts payable, accrued expenses and other liabilities	23,200,000	22,900,000
Intercompany payables	'	0
Senior notes payable	0	0
Intercompany loans payable	'	0
Investment debt	194,800,000	74,400,000
Junior subordinated debentures	'	0
Total liabilities	218,000,000	97,300,000
Equity	'	'
Kennedy-Wilson Holdings, Inc. shareholders' equity	1,650,800,000	1,141,900,000
Noncontrolling interests	400,000	0
Total equity	1,651,200,000	1,141,900,000
Total liabilities and equity	1,869,200,000	1,239,200,000
Non-Guarantor Subsidiaries [Member]	'	'
Assets	'	'
Cash and cash equivalents	118,500,000	44,800,000
Cash held by consolidated investments (including $40.6 and $0 of restricted cash)	591,300,000	8,000,000
Accounts receivable	21,000,000	8,500,000
Intercompany receivables	'	0
Loans	250,600,000	800,000
Real estate and acquired in place lease values, net of accumulated depreciation	3,494,200,000	542,800,000
Unconsolidated investments	161,100,000	180,600,000
Other assets	158,700,000	20,700,000
Investments in and advances to consolidated subsidiaries	0	0
Total assets	4,795,400,000	806,200,000
Liabilities	'	'
Accounts payable, accrued expenses and other liabilities	93,300,000	35,200,000
Intercompany payables	'	9,000,000
Senior notes payable	0	0
Intercompany loans payable	'	57,400,000
Investment debt	1,892,800,000	327,400,000
Junior subordinated debentures	'	0
Total liabilities	1,986,100,000	429,000,000
Equity	'	'
Kennedy-Wilson Holdings, Inc. shareholders' equity	1,061,300,000	326,600,000
Noncontrolling interests	1,748,000,000	50,600,000
Total equity	2,809,300,000	377,200,000
Total liabilities and equity	4,795,400,000	806,200,000
Eliminations [Member]	'	'
Assets	'	'
Cash and cash equivalents	0	0
Cash held by consolidated investments (including $40.6 and $0 of restricted cash)	0	0
Accounts receivable	0	0
Intercompany receivables	'	-9,000,000
Loans	-37,800,000	-57,400,000
Real estate and acquired in place lease values, net of accumulated depreciation	0	0
Unconsolidated investments	0	0
Other assets	0	0
Investments in and advances to consolidated subsidiaries	-3,677,000,000	-2,243,600,000
Total assets	-3,714,800,000	-2,310,000,000
Liabilities	'	'
Accounts payable, accrued expenses and other liabilities	0	0
Intercompany payables	'	-9,000,000
Senior notes payable	0	0
Intercompany loans payable	'	-57,400,000
Investment debt	-37,800,000	0
Junior subordinated debentures	'	0
Total liabilities	-37,800,000	-66,400,000
Equity	'	'
Kennedy-Wilson Holdings, Inc. shareholders' equity	-3,677,000,000	-2,243,600,000
Noncontrolling interests	0	0
Total equity	-3,677,000,000	-2,243,600,000
Total liabilities and equity	($3,714,800,000)	($2,310,000,000)

Guarantor_and_NonGuarantor_Fin4

Guarantor and Non-Guarantor Financial Statements (Income Statements) (Details) (USD $)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Revenue	'		'		'		'
Investment management, property services and research fees (includes $7.3 and $8.3 of related party fees)	$12.90		$20.90		$65		$54
Rental and hotel	93.5		10.5		161.3		27.3
Sales of real estate	1.6		1.6		19		10.1
Loans and other	5.7		0.5		11.7		1.4
Total revenue	113.7		33.5		257		92.8
Operating expenses	'		'		'		'
Commission and marketing	2		1		3.8		2.8
Rental and hotel operating	37.8		4.2		69.9		11.9
Cost of real estate sold	1.1		0.9		14.6		7.9
Compensation and related	26.8		20.9		79.6		52.8
General and administrative	11.8		5.8		28.3		17.6
Depreciation and amortization	34.7		4.5		67.3		12
Total operating expenses	114.2		37.3		263.5		105
Income from unconsolidated investments	12.1		13.2		45.9		30.1
Income from consolidated subsidiaries	0		0		0		0
Operating income	11.6		9.4		39.4		17.9
Non-operating income (expense)	'		'		'		'
Acquisition-related gains	28.9		1.6		199.2		11.1
Acquisition-related expenses	-5.3		0		-16.9		-0.5
Interest expense-investment	-13.8		-2.8		-30.2		-7.4
Interest expense - corporate	-15.9	[1]	-10.3	[1]	-41.1	[1]	-29.7	[1]
Other (expense) income	-1.9		0.1		1		0.5
Income (loss) before (provision for) benefit from income taxes	3.6		-2		151.4		-8.1
(Provision for) benefit from income taxes	-6.6		-0.8		-40.8		1.4
Net income (loss)	-3		-2.8		110.6		-6.7
Net income attributable to the noncontrolling interests	2.8		0.7		-59.9		2.6
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc.	-0.2		'		50.7		'
Preferred dividends and accretion of preferred stock issuance costs	-2		-2		-6.1		-6.1
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	-2.2		-4.1		44.6		-10.2
Parent [Member]	'		'		'		'
Revenue	'		'		'		'
Investment management, property services and research fees (includes $7.3 and $8.3 of related party fees)	0		0		0		0
Rental and hotel	0		0		0		0
Sales of real estate	0		0		0		0
Loans and other	0		0		0		0
Total revenue	0		0		0		0
Operating expenses	'		'		'		'
Commission and marketing	0		0		0		0
Rental and hotel operating	0		0		0		0
Cost of real estate sold	0		0		0		0
Compensation and related	5.3		2		8.7		5.5
General and administrative	0		0		0		0.3
Depreciation and amortization	0		0		0		0
Total operating expenses	5.3		2		8.7		5.8
Income from unconsolidated investments	0		0		0		0
Income from consolidated subsidiaries	2.3		-0.7		119.3		-0.8
Operating income	-3		-2.7		110.6		-6.6
Non-operating income (expense)	'		'		'		'
Acquisition-related gains	0		0		0		0
Acquisition-related expenses	0		'		0		0
Interest expense-investment	0		0		0		0
Interest expense - corporate	0		0		0		'
Other (expense) income	0		0		0		0
Income (loss) before (provision for) benefit from income taxes	-3		-2.7		110.6		-6.6
(Provision for) benefit from income taxes	0		0		0		0
Net income (loss)	-3		-2.7		110.6		-6.6
Net income attributable to the noncontrolling interests	0		0		0		0
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc.	-3		'		110.6		'
Preferred dividends and accretion of preferred stock issuance costs	-2		-2		-6.1		-6.1
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	-5		-4.7		104.5		-12.7
Kennedy-Wilson, Inc. [Member]	'		'		'		'
Revenue	'		'		'		'
Investment management, property services and research fees (includes $7.3 and $8.3 of related party fees)	-0.5		0		0		0.6
Rental and hotel	0		0.2		0		0.2
Sales of real estate	0		0		0		0
Loans and other	0.1		0		0.2		0
Total revenue	-0.4		0.2		0.2		0.8
Operating expenses	'		'		'		'
Commission and marketing	0		0		0		0.4
Rental and hotel operating	0		0		0		0
Cost of real estate sold	0		0		0		0
Compensation and related	8.8		11.5		39		25.1
General and administrative	3.8		2		9.4		6.4
Depreciation and amortization	0.2		0.1		0.7		0.4
Total operating expenses	12.8		13.6		49.1		32.3
Income from unconsolidated investments	2.1		0.3		3.3		0.3
Income from consolidated subsidiaries	35.7		23.6		245.2		58.3
Operating income	24.6		10.5		199.6		27.1
Non-operating income (expense)	'		'		'		'
Acquisition-related gains	0		0		-7		0
Acquisition-related expenses	0		'		0		0
Interest expense-investment	0		0		0		0
Interest expense - corporate	-15.9		-10.3		-41.1		-29.7
Other (expense) income	-0.2		0.1		0		0.4
Income (loss) before (provision for) benefit from income taxes	8.5		0.3		151.5		-2.2
(Provision for) benefit from income taxes	-6.1		-1.1		-32.2		1.4
Net income (loss)	2.4		-0.8		119.3		-0.8
Net income attributable to the noncontrolling interests	0		0		0		0
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc.	2.4		'		119.3		'
Preferred dividends and accretion of preferred stock issuance costs	0		0		0		0
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	2.4		-0.8		119.3		-0.8
Guarantor Subsidiaries [Member]	'		'		'		'
Revenue	'		'		'		'
Investment management, property services and research fees (includes $7.3 and $8.3 of related party fees)	14.1		7.3		62.6		21.5
Rental and hotel	5.6		1.5		12		4.7
Sales of real estate	0.1		1.6		0.7		10.1
Loans and other	-2.8		0.5		1.5		1.4
Total revenue	17		10.9		76.8		37.7
Operating expenses	'		'		'		'
Commission and marketing	1.6		0.8		3		2.2
Rental and hotel operating	-5.5		1		-3.1		2.6
Cost of real estate sold	0		0.9		0.7		7.9
Compensation and related	10.7		3.8		27		10.8
General and administrative	7.5		1.4		11.5		3.5
Depreciation and amortization	3.1		1.3		7.9		3.6
Total operating expenses	17.4		9.2		47		30.6
Income from unconsolidated investments	4.2		19.5		35.1		39.7
Income from consolidated subsidiaries	30.2		2.8		183.1		12.3
Operating income	34		24		248		59.1
Non-operating income (expense)	'		'		'		'
Acquisition-related gains	0		0		3.7		0
Acquisition-related expenses	-0.1		'		-1.7		-0.2
Interest expense-investment	-3.5		-0.2		-3.5		-0.7
Interest expense - corporate	0		0		0		0
Other (expense) income	0		0		1.5		0.1
Income (loss) before (provision for) benefit from income taxes	30.4		23.8		248		58.3
(Provision for) benefit from income taxes	5.1		0		-3		0
Net income (loss)	35.5		23.8		245		58.3
Net income attributable to the noncontrolling interests	0		-0.1		0		-0.1
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc.	35.5		'		245		'
Preferred dividends and accretion of preferred stock issuance costs	0		0		0		0
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	35.5		23.7		245		58.2
Non-Guarantor Subsidiaries [Member]	'		'		'		'
Revenue	'		'		'		'
Investment management, property services and research fees (includes $7.3 and $8.3 of related party fees)	-0.7		13.6		2.4		31.9
Rental and hotel	87.9		8.8		149.3		22.4
Sales of real estate	1.5		0		18.3		0
Loans and other	8.4		0		10		0
Total revenue	97.1		22.4		180		54.3
Operating expenses	'		'		'		'
Commission and marketing	0.4		0.2		0.8		0.2
Rental and hotel operating	43.3		3.2		73		9.3
Cost of real estate sold	1.1		0		13.9		0
Compensation and related	2		3.6		4.9		11.4
General and administrative	0.5		2.4		7.4		7.4
Depreciation and amortization	31.4		3.1		58.7		8
Total operating expenses	78.7		12.5		158.7		36.3
Income from unconsolidated investments	5.8		-6.6		7.5		-9.9
Income from consolidated subsidiaries	0		0		0		0
Operating income	24.2		3.3		28.8		8.1
Non-operating income (expense)	'		'		'		'
Acquisition-related gains	28.9		1.6		202.5		11.1
Acquisition-related expenses	-5.2		'		-15.2		-0.3
Interest expense-investment	-10.3		-2.6		-26.7		-6.7
Interest expense - corporate	0		0		0		0
Other (expense) income	-1.7		0		-0.5		0
Income (loss) before (provision for) benefit from income taxes	35.9		2.3		188.9		12.2
(Provision for) benefit from income taxes	-5.6		0.3		-5.6		0
Net income (loss)	30.3		2.6		183.3		12.2
Net income attributable to the noncontrolling interests	2.8		0.8		-59.9		2.7
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc.	33.1		'		123.4		'
Preferred dividends and accretion of preferred stock issuance costs	0		0		0		0
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	33.1		3.4		123.4		14.9
Eliminations [Member]	'		'		'		'
Revenue	'		'		'		'
Investment management, property services and research fees (includes $7.3 and $8.3 of related party fees)	0		0		0		0
Rental and hotel	0		0		0		0
Sales of real estate	0		0		0		0
Loans and other	0		0		0		0
Total revenue	0		0		0		0
Operating expenses	'		'		'		'
Commission and marketing	0		0		0		0
Rental and hotel operating	0		0		0		0
Cost of real estate sold	0		0		0		0
Compensation and related	0		0		0		0
General and administrative	0		0		0		0
Depreciation and amortization	0		'		0		0
Total operating expenses	0		0		0		0
Income from unconsolidated investments	0		0		0		0
Income from consolidated subsidiaries	-68.2		-25.7		-547.6		-69.8
Operating income	-68.2		-25.7		-547.6		-69.8
Non-operating income (expense)	'		'		'		'
Acquisition-related gains	0		0		0		0
Acquisition-related expenses	0		'		0		0
Interest expense-investment	0		'		0		0
Interest expense - corporate	0		0		0		0
Other (expense) income	0		0		0		0
Income (loss) before (provision for) benefit from income taxes	-68.2		-25.7		-547.6		-69.8
(Provision for) benefit from income taxes	0		0		0		0
Net income (loss)	-68.2		-25.7		-547.6		-69.8
Net income attributable to the noncontrolling interests	0		0		0		0
Net income (loss) attributable to Kennedy-Wilson Holdings, Inc.	-68.2		'		-547.6		'
Preferred dividends and accretion of preferred stock issuance costs	0		0		0		0
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	($68.20)		($25.70)		($547.60)		($69.80)
[1]	Includes early extinguishment of corporate debt

Guarantor_and_NonGuarantor_Fin5

Guarantor and Non-Guarantor Financial Statements (Comprehensive Income) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net (loss) income	($3)	($2.80)	$110.60	($6.70)
Other comprehensive (loss) income, net of tax:	'	'	'	'
Unrealized foreign currency translation (loss) gain	-89	8.8	-67.1	-9.2
Amounts reclassified out of AOCI during the period	0	0	-7.1	0
Loss on marketable securities	-1.1	0	-1.1	0
Unrealized forward contract, foreign currency gain (loss)	20.1	-3.6	16.5	2.2
Total other comprehensive (loss) gain for the period	-70	5.2	-58.8	-7
Comprehensive (loss) income	-73	2.4	51.8	-13.7
Comprehensive loss (income) attributable to noncontrolling interests	58	0.7	-23.5	2.6
Comprehensive (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	-15	3.1	28.3	-11.1
Parent [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net (loss) income	-3	-2.7	110.6	-6.6
Other comprehensive (loss) income, net of tax:	'	'	'	'
Unrealized foreign currency translation (loss) gain	-89	8.8	-67.1	-9.2
Amounts reclassified out of AOCI during the period	0	'	-7.1	'
Loss on marketable securities	-1.1	'	-1.1	'
Unrealized forward contract, foreign currency gain (loss)	20.1	-3.6	16.5	2.2
Total other comprehensive (loss) gain for the period	-70	5.2	-58.8	-7
Comprehensive (loss) income	-73	2.5	51.8	-13.6
Comprehensive loss (income) attributable to noncontrolling interests	0	0	0	0
Comprehensive (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	-73	2.5	51.8	-13.6
Kennedy-Wilson, Inc. [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net (loss) income	2.4	-0.8	119.3	-0.8
Other comprehensive (loss) income, net of tax:	'	'	'	'
Unrealized foreign currency translation (loss) gain	-89	8.8	-67.1	-9.2
Amounts reclassified out of AOCI during the period	0	'	-7.1	'
Loss on marketable securities	-1.1	'	-1.1	'
Unrealized forward contract, foreign currency gain (loss)	20.1	-3.6	16.5	2.2
Total other comprehensive (loss) gain for the period	-70	5.2	-58.8	-7
Comprehensive (loss) income	-67.6	4.4	60.5	-7.8
Comprehensive loss (income) attributable to noncontrolling interests	0	0	0	0
Comprehensive (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	-67.6	4.4	60.5	-7.8
Guarantor Subsidiaries [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net (loss) income	35.5	23.8	245	58.3
Other comprehensive (loss) income, net of tax:	'	'	'	'
Unrealized foreign currency translation (loss) gain	-21.4	6.4	2.5	-11.6
Amounts reclassified out of AOCI during the period	9.5	'	1.2	'
Loss on marketable securities	0	'	0	'
Unrealized forward contract, foreign currency gain (loss)	6.5	0.1	5.3	5.4
Total other comprehensive (loss) gain for the period	-5.4	6.5	9	-6.2
Comprehensive (loss) income	30.1	30.3	254	52.1
Comprehensive loss (income) attributable to noncontrolling interests	0	-0.1	0	-0.2
Comprehensive (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	30.1	30.2	254	51.9
Non-Guarantor Subsidiaries [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net (loss) income	30.3	2.6	183.3	12.2
Other comprehensive (loss) income, net of tax:	'	'	'	'
Unrealized foreign currency translation (loss) gain	-12.6	2.3	-16.5	-0.3
Amounts reclassified out of AOCI during the period	-9.5	'	-8.3	'
Loss on marketable securities	0	'	0	'
Unrealized forward contract, foreign currency gain (loss)	11.3	0	10.1	0
Total other comprehensive (loss) gain for the period	-10.8	2.3	-14.7	-0.3
Comprehensive (loss) income	19.5	4.9	168.6	11.9
Comprehensive loss (income) attributable to noncontrolling interests	58	0.8	'	2.8
Comprehensive (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	77.5	5.7	145.1	14.7
Eliminations [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net (loss) income	-68.2	-25.7	-547.6	-69.8
Other comprehensive (loss) income, net of tax:	'	'	'	'
Unrealized foreign currency translation (loss) gain	123	-17.5	81.1	21.1
Amounts reclassified out of AOCI during the period	0	'	14.2	'
Loss on marketable securities	1.1	'	1.1	'
Unrealized forward contract, foreign currency gain (loss)	-37.9	3.5	-31.9	-7.6
Total other comprehensive (loss) gain for the period	86.2	-14	64.5	13.5
Comprehensive (loss) income	18	-39.7	-483.1	-56.3
Comprehensive loss (income) attributable to noncontrolling interests	0	0	0	0
Comprehensive (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$18	($39.70)	($483.10)	($56.30)

Guarantor_and_NonGuarantor_Fin6

Guarantor and Non-Guarantor Financial Statements (Cash Flows) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013
Condensed Financial Statements, Captions [Line Items]	'		'
Net cash from (used in) operating activities	$85.70		($17.10)
Cash flows from investing activities:	'		'
Additions to loans	-476.4		-30.3
Collections of loans	95.9		43
Net proceeds from sale of real estate	16.3		10.5
Purchases of and additions to real estate	-1,538.20		-115.9
Proceeds from settlement of foreign forward contracts	7.5		0
Purchases of foreign currency options	-2.2		0
Capitalized development costs	0		-1.3
Purchases of foreign currency options	'		10
Distributions from unconsolidated investments	99.3		143.3
Contributions to unconsolidated investments	-139.6		-314.3
Investment in marketable securities	-11.5		0
(Investments in) distributions from consolidated subsidiaries, net	0		0
Net cash used in investing activities	-1,948.90		-255
Cash flows from financing activities:	'		'
Borrowings under line of credit	90		125
Repayment of line of credit	-90		-125
Borrowings under investment debt	825.1		72.3
Repayment of investment debt	-32.2		-1.1
Borrowings under senior notes payable	297.2		0
Debt issue costs	-28.5		-1.8
Repayment of investment debt	-72.2		'
Issuance of common stock	190.6		276
Repurchase of warrants	0		-1.4
Dividends paid	-28.4	[1]	-16.3	[1]
Repurchase and retirement of common stock	-2.9		0
Proceeds from the issuance of KWE shares, net	1,351.10		0
Change in restricted cash	-42.6		0
Acquisition of KWE shares from noncontrolling interest holders	-16.8		0
Contributions from noncontrolling interests, excluding KWE	12.9		0.9
Intercompany receivables, net	'		0
Distributions to noncontrolling interests	-24.3		-0.4
Exercise of warrants	0		4.7
Net cash provided by financing activities	2,461.20		332.9
Effect of currency exchange rate changes on cash and cash equivalents	10.8		-0.3
Net change in cash and cash equivalents	608.8	[2]	60.5	[2]
Cash and cash equivalents, beginning of period	178.2		120.9
Cash and cash equivalents, end of period	787		181.4
Parent [Member]	'		'
Condensed Financial Statements, Captions [Line Items]	'		'
Net cash from (used in) operating activities	-0.1		0.2
Cash flows from investing activities:	'		'
Additions to loans	0		0
Collections of loans	0		0
Net proceeds from sale of real estate	0		0
Purchases of and additions to real estate	0		0
Proceeds from settlement of foreign forward contracts	0		'
Purchases of foreign currency options	0		'
Capitalized development costs	'		0
Purchases of foreign currency options	'		0
Distributions from unconsolidated investments	0		0
Contributions to unconsolidated investments	0		0
Investment in marketable securities	0		'
(Investments in) distributions from consolidated subsidiaries, net	-159.3		-263.2
Net cash used in investing activities	-159.3		-263.2
Cash flows from financing activities:	'		'
Borrowings under line of credit	0		0
Repayment of line of credit	0		0
Borrowings under investment debt	0		0
Repayment of investment debt	'		0
Borrowings under senior notes payable	0		'
Debt issue costs	0		0
Repayment of investment debt	0		'
Issuance of common stock	190.6		276
Repurchase of warrants	'		-1.4
Dividends paid	-28.4		-16.3
Repurchase and retirement of common stock	-2.9		'
Proceeds from the issuance of KWE shares, net	0		'
Change in restricted cash	0		'
Acquisition of KWE shares from noncontrolling interest holders	0		'
Contributions from noncontrolling interests, excluding KWE	0		0
Intercompany receivables, net	'		0
Distributions to noncontrolling interests	0		0
Exercise of warrants	'		4.7
Net cash provided by financing activities	159.3		263
Effect of currency exchange rate changes on cash and cash equivalents	0		0
Net change in cash and cash equivalents	-0.1		0
Cash and cash equivalents, beginning of period	0		0
Cash and cash equivalents, end of period	-0.1		0
Kennedy-Wilson, Inc. [Member]	'		'
Condensed Financial Statements, Captions [Line Items]	'		'
Net cash from (used in) operating activities	-25.7		-62.2
Cash flows from investing activities:	'		'
Additions to loans	0		-8.2
Collections of loans	0		4.9
Net proceeds from sale of real estate	0		0
Purchases of and additions to real estate	-0.6		0
Proceeds from settlement of foreign forward contracts	0		'
Purchases of foreign currency options	0		'
Capitalized development costs	'		-1.3
Purchases of foreign currency options	'		10
Distributions from unconsolidated investments	0.3		0.4
Contributions to unconsolidated investments	-2		-2.3
Investment in marketable securities	0		'
(Investments in) distributions from consolidated subsidiaries, net	-198.4		178.7
Net cash used in investing activities	-200.7		182.2
Cash flows from financing activities:	'		'
Borrowings under line of credit	90		125
Repayment of line of credit	-90		-125
Borrowings under investment debt	0		0
Repayment of investment debt	'		0
Borrowings under senior notes payable	297.2		'
Debt issue costs	-7.8		-1.3
Repayment of investment debt	-40		'
Issuance of common stock	0		0
Repurchase of warrants	'		0
Dividends paid	0		0
Repurchase and retirement of common stock	0		'
Proceeds from the issuance of KWE shares, net	0		'
Change in restricted cash	0		'
Acquisition of KWE shares from noncontrolling interest holders	0		'
Contributions from noncontrolling interests, excluding KWE	0		0
Intercompany receivables, net	'		-21.9
Distributions to noncontrolling interests	0		0
Exercise of warrants	'		0
Net cash provided by financing activities	249.4		-23.2
Effect of currency exchange rate changes on cash and cash equivalents	0		0.2
Net change in cash and cash equivalents	23		97
Cash and cash equivalents, beginning of period	48.2		64.5
Cash and cash equivalents, end of period	71.2		161.5
Guarantor Subsidiaries [Member]	'		'
Condensed Financial Statements, Captions [Line Items]	'		'
Net cash from (used in) operating activities	73.7		36.5
Cash flows from investing activities:	'		'
Additions to loans	-5.8		-22.1
Collections of loans	15.1		38
Net proceeds from sale of real estate	0		10.1
Purchases of and additions to real estate	-71.6		-31.3
Proceeds from settlement of foreign forward contracts	0		'
Purchases of foreign currency options	0		'
Capitalized development costs	'		0
Purchases of foreign currency options	'		0
Distributions from unconsolidated investments	51.6		135.7
Contributions to unconsolidated investments	-47.9		-214.6
Investment in marketable securities	-11.5		'
(Investments in) distributions from consolidated subsidiaries, net	-65		8.1
Net cash used in investing activities	-135.1		-76.1
Cash flows from financing activities:	'		'
Borrowings under line of credit	0		0
Repayment of line of credit	0		0
Borrowings under investment debt	31.5		18.7
Repayment of investment debt	'		0
Borrowings under senior notes payable	0		'
Debt issue costs	-0.6		-0.1
Repayment of investment debt	-0.1		'
Issuance of common stock	0		0
Repurchase of warrants	'		0
Dividends paid	0		0
Repurchase and retirement of common stock	0		'
Proceeds from the issuance of KWE shares, net	0		'
Change in restricted cash	0		'
Acquisition of KWE shares from noncontrolling interest holders	0		'
Contributions from noncontrolling interests, excluding KWE	0		0
Intercompany receivables, net	'		0
Distributions to noncontrolling interests	0		0
Exercise of warrants	'		0
Net cash provided by financing activities	30.8		18.6
Effect of currency exchange rate changes on cash and cash equivalents	0		-10.4
Net change in cash and cash equivalents	-30.6		-31.4
Cash and cash equivalents, beginning of period	77.2		38.5
Cash and cash equivalents, end of period	46.6		7.1
Non-Guarantor Subsidiaries [Member]	'		'
Condensed Financial Statements, Captions [Line Items]	'		'
Net cash from (used in) operating activities	37.8		8.4
Cash flows from investing activities:	'		'
Additions to loans	-470.6		0
Collections of loans	80.8		0.1
Net proceeds from sale of real estate	16.3		0.4
Purchases of and additions to real estate	-1,466		-84.6
Proceeds from settlement of foreign forward contracts	7.5		'
Purchases of foreign currency options	-2.2		'
Capitalized development costs	'		0
Purchases of foreign currency options	'		0
Distributions from unconsolidated investments	47.4		7.2
Contributions to unconsolidated investments	-89.7		-97.4
Investment in marketable securities	0		'
(Investments in) distributions from consolidated subsidiaries, net	422.7		76.4
Net cash used in investing activities	-1,453.80		-97.9
Cash flows from financing activities:	'		'
Borrowings under line of credit	0		0
Repayment of line of credit	0		0
Borrowings under investment debt	793.6		53.6
Repayment of investment debt	'		-1.1
Borrowings under senior notes payable	0		'
Debt issue costs	-20.1		-0.4
Repayment of investment debt	-32.1		'
Issuance of common stock	0		0
Repurchase of warrants	'		0
Dividends paid	0		0
Repurchase and retirement of common stock	0		'
Proceeds from the issuance of KWE shares, net	1,351.10		'
Change in restricted cash	-42.6		'
Acquisition of KWE shares from noncontrolling interest holders	-16.8		'
Contributions from noncontrolling interests, excluding KWE	12.9		0.9
Intercompany receivables, net	'		21.9
Distributions to noncontrolling interests	-24.3		-0.4
Exercise of warrants	'		0
Net cash provided by financing activities	2,021.70		74.5
Effect of currency exchange rate changes on cash and cash equivalents	10.8		9.9
Net change in cash and cash equivalents	616.5		-5.1
Cash and cash equivalents, beginning of period	52.8		17.9
Cash and cash equivalents, end of period	$669.30		$12.80
[1]	Common stock dividends were declared at the end of each quarter and paid in the following quarter. The amount declared and not paid is accrued on the consolidated balance sheet.
[2]	See discussion of non-cash effects in notes to cashflow statement.

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Mar. 31, 2014	Sep. 30, 2014	Sep. 30, 2014	Oct. 31, 2014	Oct. 31, 2014
Share data in Millions, unless otherwise specified			KWE [Member]	KWE [Member]	KWE [Member]	Subsequent Event	Subsequent Event
						Revolving Credit Facility [Member]	KWE [Member]
						Unsecured Debt [Member]
Subsequent Event [Line Items]	'	'	'	'	'	'	'
Amount oustanding	'	'	'	'	'	$50,000,000	'
Remaining borrowing capacity	'	'	'	'	'	250,000,000	'
Proceeds from issuance initial public offering	'	'	1,700,000,000	'	'	'	565,000,000
Acquisition of KWE shares from noncontrolling interest holders	'	'	'	16,800,000	16,800,000	'	75,000,000
Ownership percentage by parent	'	'	'	13.30%	13.30%	'	13.30%
Shares in KWE	'	'	'	13.3	13.3	'	18
Investments in KWE	$0	$0	'	'	'	'	$297,600,000