Fair Value Measurements (Tables)

6 Months Ended

Nov. 30, 2014

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 November 30, 2014 and May 31, 2014:

			Fair Value Measurements
	Fair Value at November 30, 2014		Using Inputs Considered as
(in millions)			Level 1		Level 2		Level 3
Assets:
Money market funds	$	124.6	$	124.6	$	—	$	—
Time deposits	10.2		—		10.2		—
Pension plan assets	144.9		—		129.9		15.0
Foreign currency exchange contracts	6.0		—		6.0		—
Equity securities	3.4		3.2		—		0.2
Total assets	$	289.1	$	127.8	$	146.1	$	15.2
Liabilities:
Interest rate swaps	$	15.5	$	—	$	15.5	$	—
Foreign currency exchange contracts	0.4		—		0.4		—
Total liabilities	$	15.9	$	—	$	15.9	$	—
			Fair Value Measurements
	Fair Value at May 31, 2014		Using Inputs Considered as
(in millions)			Level 1		Level 2		Level 3
Assets:
Money market funds	$	145.0	$	145.0	$	—	$	—
Time deposits	25.8		—		25.8		—
Pension plan assets	147.5		—		132.5		15.0
Foreign currency exchange contracts	1.1		—		1.1		—
Equity securities	0.5		0.3		—		0.2
Total assets	$	319.9	$	145.3	$	159.4	$	15.2
Liabilities:
Interest rate swaps	$	20.2	$	—	$	20.2	$	—
Foreign currency exchange contracts	1.3		—		1.3		—
Total liabilities	$	21.5	$	—	$	21.5	$	—