Investments (Tables)

9 Months Ended

12 Months Ended

Feb. 28, 2013

May 31, 2012

Investments, Debt and Equity Securities [Abstract]

Schedule of Investment Securities

At February 28, 2013, the Company’s investment securities were classified as follows:

	Amortized		Unrealized				Fair
(in millions)	Cost		Gains		Losses		Value
Available-for-sale:
Equity securities	$	0.2	$	0.1	$	—	$	0.3
Time deposit	15.9		0.1		—		16.0
Greek bonds	1.1		3.8		—		4.9
Total available-for-sale investments	$	17.2	$	4.0	$	—	$	21.2

	Amortized		Realized				Fair
	Cost		Gains		Losses		Value
Trading:
Equity securities	$	0.8	$	0.1	$	—	$	0.9
Total trading investments	$	0.8	$	0.1	$	—	$	0.9

At May 31, 2012, the Company’s investment securities were classified as follows:

	Amortized		Unrealized					Fair
(in millions)	Cost		Gains		Losses			Value
Available-for-sale:
Equity securities	$	0.4	$	—	$	(0.2	)	$	0.2
Time deposit	9.5		—		—			9.5
Greek bonds	6.3		—		—			6.3
Total available-for-sale investments	$	16.2	$	—	$	(0.2	)	$	16.0
	Amortized		Realized					Fair
	Cost		Gains		Losses			Value
Trading:
Equity securities	$	0.4	$	—	$	—		$	0.4
Total trading investments	$	0.4	$	—	$	—		$	0.4

At May 31, 2012, the Company’s investment securities were classified as follows:

			Unrealized
(in millions)	Amortized Cost		Gains		Losses			Fair Value
Available-for-sale:
Equity securities	$	0.4	$	—	$	(0.2	)	$	0.2
Time deposit	9.5		—		—			9.5
Greek bonds	6.3		—		—			6.3
Total available-for-sale investments	$	16.2	$	—	$	(0.2	)	$	16.0

			Realized
(in millions)	Amortized Cost		Gains		Losses		Fair Value
Trading:
Equity securities	$	0.4	$	—	$	—	$	0.4
Total trading investments	$	0.4	$	—	$	—	$	0.4

At May 31, 2011, the Company’s investment securities were classified as follows:

			Unrealized
(in millions)	Amortized Cost		Gains		Losses			Fair Value
Available-for-sale:
Equity securities	$	0.5	$	0.1	$	(0.2	)	$	0.4
Money market funds	9.5		—		—			9.5
Time deposit	33.1		—		—			33.1
Greek bonds	35.6		—		(4.5)			31.1
Other investments	0.3		—		—			0.3
Total available-for-sale investments	$	79.0	$	0.1	$	(4.7	)	$	74.4

			Realized
(in millions)	Amortized Cost		Gains		Losses		Fair Value
Trading:
Equity securities	$	0.1	$	—	$	—	$	0.1
Total trading investments	$	0.1	$	—	$	—	$	0.1

Investment Income on Available-for-Sale Securities

Investment income on available-for-sale securities (included in other (income) expense) consists of the following:

(in millions)	Year Ended May 31, 2012		Year Ended May 31, 2011		Year Ended May 31, 2010
Interest income	$	0.4	$	0.6	$	0.3
Dividend income	0.2		0.1		0.1
Net realized gains	2.0		2.6		4.3
Total investment income	$	2.6	$	3.3	$	4.7