Fair Value Measurements (Tables)

9 Months Ended

12 Months Ended

Feb. 28, 2013

May 31, 2012

Fair Value Disclosures [Abstract]

Fair Value of Assets and Liabilities Measured on Recurring Basis

The following table provides information by level for assets and liabilities that are measured at fair value on a recurring basis at February 28, 2013 and May 31, 2012:

			Fair Value Measurements
	Fair Value at February 28, 2013		Using Inputs Considered as
(in millions)			Level 1		Level 2		Level 3
Assets:
Money market funds	$	122.4	$	122.4	$	—	$	—
Time deposits	16.0		—		16.0		—
Greek bonds	4.9		—		4.9		—
Pension plan assets	128.4		—		128.4		—
Foreign currency exchange contracts	0.2		—		0.2		—
Other	0.3		0.2		—		0.1
Total assets	$	272.2	$	122.6	$	149.5	$	0.1
Liabilities:
Interest rate swaps	$	66.6	$	—	$	66.6	$	—
Foreign currency exchange contracts	1.5		—		1.5		—
Total liabilities	$	68.1	$	—	$	68.1	$	—
			Fair Value Measurements
	Fair Value at		Using Inputs Considered as
(in millions)	May 31, 2012		Level 1		Level 2		Level 3
Assets:
Money market funds	$	303.1	$	303.1	$	—	$	—
Time deposits	36.3		—		36.3		—
Greek bonds	6.3		—		6.3		—
Pension plan assets	108.7		—		108.7		—
Foreign currency exchange contracts	0.2		—		0.2		—
Other	0.2		—		—		0.2
Total assets	$	454.8	$	303.1	$	151.5	$	0.2
Liabilities:
Interest rate swaps	$	76.2	$	—	$	76.2	$	—
Foreign currency exchange contracts	0.2		—		0.2		—
Total liabilities	$	76.4	$	—	$	76.4	$	—

The following table provides information by level for assets and liabilities that are measured at fair value on a recurring basis at May 31, 2012 and May 31, 2011:

	Fair Value at		Fair Value Measurement Using Inputs Considered as
(in millions)	May 31, 2012		Level 1		Level 2		Level 3
Assets:
Money market funds	$	303.1	$	303.1	$	—	$	—
Time deposits	36.3		—		36.3		—
Greek bonds	6.3		—		6.3		—
Pension plan assets	108.7		—		108.7		—
Foreign currency exchange contracts	0.2		—		0.2		—
Other	0.2		—		—		0.2
Total assets	$	454.8	$	303.1	$	151.5	$	0.2
Liabilities:
Interest rate swaps	$	76.2	$	—	$	76.2	$	—
Foreign currency exchange contracts	0.2		—		0.2		—
Total liabilities	$	76.4	$	—	$	76.4	$	—

	Fair Value at		Fair Value Measurement Using Inputs Considered as
(in millions)	May 31, 2011		Level 1		Level 2		Level 3
Assets:
Corporate debt securities	$	0.3	$	—	$	0.3	$	—
Money market funds	132.5		132.5		—		—
Time deposit	47.4		—		47.4		—
Greek bonds	31.1		—		31.1		—
Pension plan assets	104.1		—		104.1		—
Foreign currency exchange contracts	0.2		—		0.2		—
Other	0.5		0.3		—		0.2
Total assets	$	316.1	$	132.8	$	183.1	$	0.2
Liabilities:
Interest rate swaps	$	96.8	$	—	$	96.8	$	—
Foreign currency exchange contracts	0.1		—		0.1		—
Total liabilities	$	96.9	$	—	$	96.9	$	—

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The following table provides a reconciliation of the beginning and ending balances of items measured at fair value on a recurring basis in the tables above that used significant unobservable inputs (Level 3) as of May 31, 2012 and May 31, 2011:

(in millions)
Balance at June 1, 2010	$	5.7
Total net gains included in earnings	2.6
Total unrealized gains included in other comprehensive income	(2.6)
Total proceeds from sale of Level 3 investments	(5.5)
Balance at May 31, 2011	$	0.2
Total net gains included in earnings	—
Total unrealized gains included in other comprehensive income	—
Total proceeds from sale of Level 3 investments	—
Balance at May 31, 2012	$	0.2