Consolidated Statement of Equity (Unaudited) (USD $) In Millions, except Share data, unless otherwise specified	Total		Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income [Member]	Noncontrolling Interest [Member]	KWE [Member]	KWE [Member] Additional Paid-in Capital [Member]	KWE [Member] Noncontrolling Interest [Member]
Balance at Dec. 31, 2013	$ 818.9		$ 0	$ 0	$ 801.3	$ (42.2)	$ 9.2	$ 50.6
Balance, common shares (in shares) at Dec. 31, 2013	82,592,607			82,592,607
Balance, preferred shares (in shares) at Dec. 31, 2013			132,550
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	190.8			0	190.8
Issuance of common stock (in shares)				9,200,000
Shares forfeited	0
Shares forfeited (in shares)				(2,475)
Repurchase and retirement of common stock	(2.5)				(2.5)
Shares retired due to RSG vesting (in shares)				(107,005)
Stock compensation expense	1.7				1.7
Other comprehensive income:
Unrealized foreign currency translation, net of tax	0						0
Unrealized forward contract foreign currency loss, net of tax	(1.5)						(1.5)
Preferred stock dividends	(2.0)					(2.0)
Common stock dividends	(8.2)	[1]				(8.2)
Net income	49.9					12.5		37.4
Consolidation of noncontrolling interests (Note 4)	167.9							167.9
Contributions from noncontrolling interests	2.9							2.9	1,409.1	(6.5)	1,415.6
Distributions to noncontrolling interests	(2.8)							(2.8)
Balance at Mar. 31, 2014	$ 2,624.2				$ 984.8	$ (39.9)	$ 7.7	$ 1,671.6
Balance, common shares (in shares) at Mar. 31, 2014	91,683,127			91,683,127
Balance, preferred shares (in shares) at Mar. 31, 2014			132,550

[1] $0.0001 par value per share, 125,000,000 shares authorized as of March 31, 2014 and 2013, respectively.