Unconsolidated Investments (Cash Distributions KW Residential, LLC) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Schedule of Equity Method Investments [Line Items]
Operating distributions			$ 50.0
Total			100.3
KW Residential, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Operating distributions	1.3	0.5	1.7	2.5
Refinancing of property level debt	0	4.4	0	5.3
Settlement of hedges	0	0.2	0	10.8
Total	$ 1.3	$ 5.1	$ 1.7	$ 18.6