Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income	$ 19.4	$ 12.9	$ 162.2	$ 179.2
Other comprehensive income (loss), net of tax:
Unrealized foreign currency translation loss	(31.7)	(7.5)	(36.4)	(46.4)
Amounts reclassified out of AOCI during the period	0.0	0.1	9.8	13.2
Total other comprehensive (loss) income for the period	(8.3)	(7.6)	13.9	(11.2)
Comprehensive income	11.1	5.3	176.1	168.0
Comprehensive loss (income) attributable to noncontrolling interests	2.3	0.1	(105.0)	(65.0)
Comprehensive income (loss) attributable to Kennedy-Wilson Holdings, Inc.	13.4	5.4	71.1	103.0
Foreign Exchange Contract [Member]
Other comprehensive income (loss), net of tax:
Unrealized gain (loss)	24.9		42.4
Unrealized gain (loss)		(0.2)		22.0
Interest Rate Swap [Member]
Other comprehensive income (loss), net of tax:
Unrealized gain (loss)	$ (1.5)		$ (1.9)
Unrealized gain (loss)		$ 0.0		$ 0.0