Document and Entity Information	3 Months Ended
	Mar. 31, 2012	May 01, 2012
Entity Information [Line Items]
Entity Registrant Name	Kennedy-Wilson Holdings, Inc.
Entity Central Index Key	0001408100
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		51,822,998