Earnings (Loss) Per Share (Tables)

6 Months Ended

Nov. 30, 2017

Earnings Per Share [Abstract]

Schedule of basic and diluted earnings per share

The following table summarizes the reconciliation of the numerators and denominators for the basic and diluted earnings (loss) per share computation for the periods indicated:

	Three months ended November 30,				Six months ended November 30,
	2017		2016		2017			2016
Earnings (loss) from continuing operations attributable to Class A and Common Shares	$	57.0	$	67.8	$	(6.6	)	$	28.3
Earnings (loss) from discontinued operations attributable to Class A and Common Shares, net of tax	—		0.0		—			(0.1		)
Net income (loss) attributable to Class A and Common Shares	$	57.0	$	67.8	$	(6.6	)	$	28.2
Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings (loss) per share (in millions)	35.0		34.5		35.1			34.5
Dilutive effect of Class A Stock and Common Stock potentially issuable pursuant to stock-based compensation plans (in millions)	0.6		0.7		—			0.7
Adjusted weighted average Shares of Class A Stock and Common Stock outstanding for diluted earnings (loss) per share (in millions)	35.6		35.2		35.1			35.2
Earnings (loss) per share of Class A Stock and Common Stock:
Basic earnings (loss) per share:
Earnings (loss) from continuing operations	$	1.63	$	1.96	$	(0.19	)	$	0.82
Earnings (loss) from discontinued operations, net of tax	$	—	$	0.00	$	—		$	(0.00	)
Net income (loss)	$	1.63	$	1.96	$	(0.19	)	$	0.82
Diluted earnings (loss) per share:
Earnings (loss) from continuing operations	$	1.60	$	1.92	$	(0.19	)	$	0.81
Earnings (loss) from discontinued operations, net of tax	$	—	$	0.00	$	—		$	(0.01	)
Net income (loss)	$	1.60	$	1.92	$	(0.19	)	$	0.80

Schedule of stock option activity

The following table sets forth Options outstanding pursuant to stock-based compensation plans as of the dates indicated: 

	November 30, 2017	November 30, 2016
Options outstanding pursuant to stock-based compensation plans (in millions)	3.2	3.3