Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

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

	2017			2016			2015
Earnings from continuing operations	$	220.6		$	99.3		$	57.9
Earnings allocated to participating non-vested share awards		(0.7	)		(0.3	)		(0.2	)
Earnings from continuing operations attributable to common shares	$	219.9		$	99.0		$	57.7

Reconciliation of Basic Shares Outstanding to Diluted Shares Outstanding

	2017		2016		2015
	(in millions)
Basic shares outstanding		53.3		55.4		55.5
Dilutive effect of common stock equivalents		0.6		0.3		0.4
Diluted shares outstanding		53.9		55.7		55.9