Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic EPS
Net income (loss) attributable to shareholders	$ (37.3)	$ 11.7	$ (193.2)	$ (2.9)
Weighted average shares outstanding for basic earnings (loss) per share	221.1	218.0	220.5	217.2
Basic earnings (loss) per common share attributable to shareholders (in dollars per share)	$ (0.17)	$ 0.05	$ (0.88)	$ (0.01)
Diluted EPS
Net income (loss) attributable to shareholders	$ (37.3)	$ 11.7	$ (193.2)	$ (2.9)
Weighted average shares outstanding for basic earnings (loss) per share	221.1	218.0	220.5	217.2
Weighted average shares outstanding for diluted earnings (loss) per share	221.1	224.5	220.5	217.2
Diluted earnings (loss) per common share attributable to shareholders (in dollars per share)	$ (0.17)	$ 0.05	$ (0.88)	$ (0.01)
Restricted Stock Units (RSUs)
Diluted EPS
Dilutive effect of stocks (in shares)	0.0	5.0	0.0	0.0
Stock Options
Diluted EPS
Dilutive effect of stocks (in shares)	0.0	1.5	0.0	0.0