Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 49.9	$ (2.6)
Other comprehensive income (loss), net of tax:
Unrealized foreign currency translation loss	(1.2)	(14.4)
Amounts reclassified out of AOCI during the period	1.2	0
Unrealized forward contract, foreign currency (loss) gain	(1.5)	3.6
Total other comprehensive loss for the period	(1.5)	(10.8)
Comprehensive income (loss)	48.4	(13.4)
Comprehensive (income) loss attributable to noncontrolling interests	(37.4)	1.0
Comprehensive income (loss) attributable to Kennedy-Wilson Holdings, Inc.	$ 11.0	$ (12.4)