Loss Per Share - Computation of Weighted Average Shares Outstanding (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net loss from continuing operations	$ (3.5)	$ (8.9)
Net income attributable to the non-controlling interests	(0.6)	(1.3)
Net loss from continuing operations attributable to common stockholders	$ (4.1)	$ (10.2)
Basic weighted average common shares outstanding (in shares)	268.2	287.9
Denominator adjustments for diluted EPS (in shares)	0.0	0.0
Dilutive weighted average common shares outstanding (in shares)	268.2	287.9
Loss per share from continuing operations attributable to common stockholders:
Basic (in dollars per share)	$ (0.02)	$ (0.04)
Diluted (in dollars per share)	(0.02)	(0.04)
Dividends per share paid to common stockholders (in dollars per share)	$ 0	$ 0