Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue
Total revenue	$ 114.2	$ 143.0	$ 344.4	$ 427.4
Expenses
General and administrative	8.6	8.4	26.1	30.2
Depreciation and amortization	44.3	46.4	135.1	141.7
Total expenses	116.3	147.9	361.9	444.8
Income from unconsolidated investments	14.9	84.0	45.0	131.6
Gain on sale of real estate, net	4.0	6.3	47.7	252.4
Transaction-related expenses	(0.1)	(4.0)	(0.6)	(5.9)
Interest expense	(50.8)	(51.8)	(151.3)	(162.8)
Other income (loss)	1.6	0.0	1.7	(0.6)
(Loss) income before benefit from (provision for) income taxes	(32.5)	29.6	(75.0)	197.3
Benefit from (provision for) income taxes	12.8	(10.2)	10.3	(35.1)
Net (loss) income	(19.7)	19.4	(64.7)	162.2
Net (income) loss attributable to the noncontrolling interests	(1.1)	1.3	0.5	(96.0)
Preferred dividends and accretion of preferred stock issuance costs	(4.3)	0.0	(12.9)	0.0
Net (loss) income attributable to Kennedy-Wilson Holdings, Inc. common shareholders	$ (25.1)	$ 20.7	$ (77.1)	$ 66.2
Basic (loss) income per share
(Loss) income per share (in dollars per share)	$ (0.18)	$ 0.15	$ (0.55)	$ 0.47
Weighted average shares outstanding (in shares)	140,119,442	139,947,518	140,181,438	139,669,971
Diluted (loss) income per share
Loss (income) per share (in dollars per share)	$ (0.18)	$ 0.15	$ (0.55)	$ 0.47
Weighted average shares outstanding (in shares)	140,119,442	140,538,139	140,181,438	141,445,947
Dividends declared per common share (in dollars per share)	$ 0.22	$ 0.21	$ 0.66	$ 0.63
Rental [Member]
Revenue
Total revenue	$ 102.2	$ 108.3	$ 308.8	$ 336.1
Expenses
Cost of goods and services	33.5	39.0	102.2	113.3
Hotel [Member]
Revenue
Total revenue	3.1	25.1	10.4	62.9
Expenses
Cost of goods and services	2.7	17.3	10.9	47.6
Sale of Real Estate [Member]
Revenue
Total revenue	0.0	0.0	0.0	1.1
Expenses
Cost of goods and services	0.0	0.0	0.0	1.2
Investment Management and Property Services Fees [Member]
Revenue
Total revenue	8.9	9.6	25.2	27.3
Commission and Marketing [Member]
Expenses
Cost of goods and services	0.9	1.2	2.5	2.9
Compensation and Related [Member]
Expenses
Cost of goods and services	$ 26.3	$ 35.6	$ 85.1	$ 107.9