Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Reconciliation of information used in computing basic and diluted earnings per share [Abstract]
(Loss) earnings from continuing operations	$ (19.5)	$ 5.9	$ (32.3)	$ 3.2
Earnings from discontinued operations, net	0.0	0.0	3.7	0.0
Net (loss) earnings	$ (19.5)	$ 5.9	$ (28.6)	$ 3.2
Basic (loss) earnings per common share:
Earnings (loss) from continuing operations, per basic share	$ (0.21)	$ 0.06	$ (0.35)	$ 0.04
Earnings from discontinued operations, per basic share	0	0	0.04	0
Net earnings (loss) per share, basic	$ (0.21)	$ 0.06	$ (0.31)	$ 0.04
Weighted average shares outstanding	91,589,156	91,018,213	91,721,440	90,780,035
Diluted (loss) earnings per common share:
Earnings (loss) from continuing operations, per diluted share	$ (0.21)	$ 0.06	$ (0.35)	$ 0.03
Loss from discontinued operations, net	0	0	0.04	0
Net earnings (loss) per share, diluted	$ (0.21)	$ 0.06	$ (0.31)	$ 0.03
Diluted (in shares)	91,589,156	92,507,279	91,721,440	92,184,274
Weighted average number of anti-dilutive shares excluded from the calculation (in shares)	6,157,127	4,306,633	5,176,141	4,457,926