SUBSEQUENT EVENTS (Details)	1 Months Ended			12 Months Ended			1 Months Ended		0 Months Ended
	Sep. 30, 2013 USD ($)	Apr. 30, 2013 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Jan. 31, 2014 Subsequent Event [Member] USD ($)	Feb. 28, 2014 Unsecured Debt [Member] Revolving Credit Facility [Member] Subsequent Event [Member] USD ($)	Feb. 28, 2014 Kennedy Wilson Europe Real Estate, Pllc [Member] Subsequent Event [Member] USD ($)	Feb. 28, 2014 Kennedy Wilson Europe Real Estate, Pllc [Member] Subsequent Event [Member] GBP (£)
Subsequent Event [Line Items]
Issuance of common stock	6,900,000	1,400,000	9,000,000	17,250,000	8,625,000	11,700,000	9,200,000
Issuance of common stock	$ 122,000,000	$ 20,100,000	$ 133,800,000	$ 275,900,000	$ 106,200,000	$ 123,100,000	$ 190,800,000
Dividends declared per common share (in dollar per share)				$ 0.28	$ 0.20	$ 0.11	$ 0.09
Increase in dividend per share, percentage							29.00%
Annual dividend per share							$ 0.36
Ordinary Shares, Initial Public Offering Share Subscription									203,000,000	122,000,000
Ordinary Shares, Initial Public Offering Share Subscription, Cash									145,000,000	87,000,000
Ordinary Shares, Initial Public Offering Share Subscription, Contribution of Assets									58,000,000	35,000,000
Proceeds from Issuance Initial Public Offering									1,700,000,000	1,000,000,000
Initial Public Offering Share Subscription, Exercise of Over Allotment Option									151,000,000	91,000,000
Noncontrolling Interest, Ownership Percentage by Parent									12.20%	12.20%
Proceeds from unsecured credit facility								65,000,000
Availability on credit facility								$ 75,000,000