Earnings per Share (EPS) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
EPS numerator:
Loss from continuing operations, net of income taxes	$ (44.3)	$ (10.3)
Less: Net income attributable to noncontrolling interests	4.4	4.0
Loss from continuing operations attributable to common stockholders, before allocation of earnings to participating securities	(48.7)	(14.3)
Less: Earnings allocated to participating securities	0.3	0.2
Loss from continuing operations attributable to common stockholders, after allocation of earnings to participating securities	(49.0)	(14.5)
Income (loss) from discontinued operations, net of income taxes	0.2	(9.1)
Net loss attributable to common stockholders, after earnings allocated to participating securities	$ (48.8)	$ (23.6)
EPS denominator:
Weighted average shares outstanding - basic	267.9	266.9
Weighted average shares outstanding - diluted	267.9	266.9
Basic EPS attributable to common stockholders:
Loss from continuing operations	$ (0.18)	$ (0.05)
Income (loss) from discontinued operations	$ 0.00	$ (0.04)
Net loss attributable to common stockholders	$ (0.18)	$ (0.09)
Diluted EPS attributable to common stockholders:
Loss from continuing operations	$ (0.18)	$ (0.05)
Income (loss) from discontinued operations	$ 0.00	$ (0.04)
Net loss attributable to common stockholders	$ (0.18)	$ (0.09)
Earnings per Share (EPS) (Textuals) [Abstract]
Antidilutive shares excluded from EPS calculation	4.6	1.0