Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Reconciliation of Net Earnings to Net Earnings Attributable to Common Shares Used in Basic and Diluted Calculation

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2017			2016			2017			2016
Earnings from continuing operations	$	43.5		$	55.9		$	115.8		$	65.4
Earnings allocated to participating non-vested share awards		(0.2	)		(0.2	)		(0.4	)		(0.2	)
Earnings from continuing operations attributable to common shares	$	43.3		$	55.7		$	115.4		$	65.2

Reconciliation of Basic Shares Outstanding to Diluted Shares Outstanding

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Basic shares outstanding		53.0		55.5		53.5		55.6
Dilutive effect of common stock equivalents		0.5		0.5		0.4		0.4
Diluted shares outstanding		53.5		56.0		53.9		56.0