GUARANTOR AND NON-GUARANTOR FINANCIAL STATEMENTS (Balance Sheets) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010
Assets
Cash and cash equivalents	$ 178,200,000	$ 120,900,000	$ 115,900,000		$ 46,900,000
Short term investments	0	10,000,000
Accounts receivable	5,200,000	3,600,000
Accounts receivable—related parties	11,400,000	22,400,000
Intercompany receivables		0
Notes receivable	52,700,000	136,600,000
Notes receivable—related parties	4,100,000	0
Intercompany Receivables
Real estate, net of accumulated depreciation	668,800,000	289,400,000
Investments in joint ventures	751,400,000	543,200,000
Investments in and advances to consolidated subsidiaries
Investments in loan pool participations	34,700,000	95,600,000
Other assets	68,400,000	38,100,000
Goodwill	23,900,000	24,000,000
Total assets	1,798,800,000	1,283,800,000
Liabilities
Accounts payable	2,600,000	1,800,000
Accrued expenses and other liabilities	64,300,000	29,400,000
Intercompany payables		0
Accrued salaries and benefits	32,200,000	25,000,000
Deferred tax liability	24,100,000	22,700,000
Senior notes payable	409,000,000	409,600,000
Intercompany loans payable		0
Mortgage loans and notes payable	407,700,000	236,500,000
Junior subordinated debentures	40,000,000	40,000,000
Total liabilities	979,900,000	765,000,000
Equity
Kennedy-Wilson Holdings, Inc. shareholders' equity	768,300,000	509,700,000
Noncontrolling interests	50,600,000	9,100,000
Total equity	818,900,000	518,800,000	413,600,000		312,900,000
Total liabilities and equity	1,798,800,000	1,283,800,000
Parent [Member]
Assets
Cash and cash equivalents
Short term investments		0
Accounts receivable
Accounts receivable—related parties
Intercompany receivables		0
Notes receivable
Notes receivable—related parties	0
Intercompany Receivables
Real estate, net of accumulated depreciation
Investments in joint ventures
Investments in and advances to consolidated subsidiaries	775,100,000	514,300,000
Investments in loan pool participations
Other assets
Goodwill
Total assets	775,100,000	514,300,000
Liabilities
Accounts payable
Accrued expenses and other liabilities	6,800,000
Intercompany payables		0
Accrued salaries and benefits		4,700,000
Deferred tax liability
Senior notes payable
Intercompany loans payable		0
Mortgage loans and notes payable
Junior subordinated debentures
Total liabilities	6,800,000	4,700,000
Equity
Kennedy-Wilson Holdings, Inc. shareholders' equity	768,300,000	509,600,000
Noncontrolling interests
Total equity	768,300,000	509,600,000
Total liabilities and equity	775,100,000	514,300,000
Kennedy-Wilson, Inc. [Member]
Assets
Cash and cash equivalents	48,200,000	64,500,000	95,800,000		42,800,000
Short term investments		10,000,000
Accounts receivable	200,000	400,000
Accounts receivable—related parties	900,000	200,000
Intercompany receivables	9,000,000	3,300,000
Notes receivable	700,000	1,900,000
Notes receivable—related parties	1,600,000	39,600,000
Intercompany Receivables	57,400,000
Real estate, net of accumulated depreciation
Investments in joint ventures	7,500,000	5,700,000
Investments in and advances to consolidated subsidiaries	1,141,900,000	873,700,000
Investments in loan pool participations
Other assets	20,900,000	18,400,000
Goodwill
Total assets	1,288,300,000	1,017,700,000
Liabilities
Accounts payable	300,000	800,000
Accrued expenses and other liabilities	23,100,000	14,900,000
Intercompany payables		0
Accrued salaries and benefits	22,500,000	17,900,000
Deferred tax liability	18,300,000	20,200,000
Senior notes payable	409,000,000	409,600,000
Intercompany loans payable		0
Mortgage loans and notes payable
Junior subordinated debentures	40,000,000	40,000,000
Total liabilities	513,200,000	503,400,000
Equity
Kennedy-Wilson Holdings, Inc. shareholders' equity	775,100,000	514,300,000
Noncontrolling interests
Total equity	775,100,000	514,300,000
Total liabilities and equity	1,288,300,000	1,017,700,000
Guarantor Subsidiaries [Member]
Assets
Cash and cash equivalents	77,200,000	38,500,000	2,500,000	[1]	3,300,000	[1]
Short term investments		0
Accounts receivable	1,900,000	2,100,000
Accounts receivable—related parties	5,100,000	4,800,000
Intercompany receivables		0
Notes receivable	51,200,000	133,800,000
Notes receivable—related parties	2,500,000
Intercompany Receivables
Real estate, net of accumulated depreciation	145,300,000	93,900,000
Investments in joint ventures	563,300,000	450,200,000
Investments in and advances to consolidated subsidiaries	326,600,000	142,400,000
Investments in loan pool participations	34,700,000	95,600,000
Other assets	14,200,000	11,600,000
Goodwill	17,200,000	17,200,000
Total assets	1,239,200,000	990,100,000
Liabilities
Accounts payable	800,000	300,000
Accrued expenses and other liabilities	14,200,000	7,200,000
Intercompany payables		0
Accrued salaries and benefits	2,200,000	1,600,000
Deferred tax liability	5,700,000	2,300,000
Senior notes payable
Intercompany loans payable		0
Mortgage loans and notes payable	74,400,000	112,100,000
Junior subordinated debentures
Total liabilities	97,300,000	123,500,000
Equity
Kennedy-Wilson Holdings, Inc. shareholders' equity	1,141,900,000	873,800,000
Noncontrolling interests		(7,200,000)
Total equity	1,141,900,000	866,600,000
Total liabilities and equity	1,239,200,000	990,100,000
Non-Guarantor Subsidiaries [Member]
Assets
Cash and cash equivalents	52,800,000	17,900,000	17,600,000		800,000
Short term investments		0
Accounts receivable	3,100,000	1,100,000
Accounts receivable—related parties	5,400,000	17,400,000
Intercompany receivables		0
Notes receivable	800,000	900,000
Notes receivable—related parties	0
Intercompany Receivables
Real estate, net of accumulated depreciation	523,500,000	195,500,000
Investments in joint ventures	180,600,000	87,300,000
Investments in and advances to consolidated subsidiaries
Investments in loan pool participations
Other assets	33,300,000	8,100,000
Goodwill	6,700,000	6,800,000
Total assets	806,200,000	335,000,000
Liabilities
Accounts payable	1,500,000	700,000
Accrued expenses and other liabilities	20,200,000	7,300,000
Intercompany payables	9,000,000	3,300,000
Accrued salaries and benefits	7,500,000	800,000
Deferred tax liability	100,000	200,000
Senior notes payable
Intercompany loans payable	57,400,000	39,600,000
Mortgage loans and notes payable	333,300,000	124,400,000
Junior subordinated debentures
Total liabilities	429,000,000	176,300,000
Equity
Kennedy-Wilson Holdings, Inc. shareholders' equity	326,600,000	142,400,000
Noncontrolling interests	50,600,000	16,300,000
Total equity	377,200,000	158,700,000
Total liabilities and equity	806,200,000	335,000,000
Eliminations [Member]
Assets
Cash and cash equivalents
Short term investments		0
Accounts receivable
Accounts receivable—related parties
Intercompany receivables	(9,000,000)	(3,300,000)
Notes receivable
Notes receivable—related parties	0	(39,600,000)
Intercompany Receivables	(57,400,000)
Real estate, net of accumulated depreciation
Investments in joint ventures
Investments in and advances to consolidated subsidiaries	(2,243,600,000)	(1,530,400,000)
Investments in loan pool participations
Other assets
Goodwill
Total assets	(2,310,000,000)	(1,573,300,000)
Liabilities
Accounts payable
Accrued expenses and other liabilities
Intercompany payables	(9,000,000)	(3,300,000)
Accrued salaries and benefits
Deferred tax liability
Senior notes payable
Intercompany loans payable	(57,400,000)	(39,600,000)
Mortgage loans and notes payable
Junior subordinated debentures
Total liabilities	(66,400,000)	(42,900,000)
Equity
Kennedy-Wilson Holdings, Inc. shareholders' equity	(2,243,600,000)	(1,530,400,000)
Noncontrolling interests
Total equity	(2,243,600,000)	(1,530,400,000)
Total liabilities and equity	$ (2,310,000,000)	$ (1,573,300,000)

[1] Included in the guarantor subsidiaries column above are data for certain subsidiaries that were less than 100% owned for the year ended December 31, 2011 by Kennedy-Wilson at the time the notes were originally issued. Such guarantor subsidiaries were restructured prior to registering the notes such that Kennedy-Wilson now owns 100% of all the guarantor subsidiaries. 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 such guarantor subsidiaries.