Employee Benefit Plans (Tables)

12 Months Ended

May 31, 2018

Employee Benefit Plans

Schedule of change to the entity's projected benefit obligation and the fair value of plan assets for pension plans

	May 31,
	2018			2017
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	145.4		$	145.7
Service cost		2.4			2.5
Interest cost		4.3			4.2
Participant contributions		0.4			0.3
Net actuarial gain		(2.3	)		(2.0	)
Benefits and administrative payments		(6.5	)		(6.0	)
Plan change		0.7			—
Foreign currency translation adjustment		2.1			0.7
Projected benefit obligation at end of year	$	146.5		$	145.4
Change in the fair value of plan assets:
Fair value of plan assets at beginning of year	$	118.8		$	111.0
Actual return on plan assets		11.6			9.9
Employer contributions		8.4			2.9
Participant contributions		0.4			0.3
Benefits and administrative payments		(6.5	)		(6.0	)
Foreign currency translation adjustment		1.8			0.7
Fair value of plan assets at end of year	$	134.5		$	118.8
Funded status at end of year	$	(12.0	)	$	(26.6	)

Schedule of amounts recognized in the Consolidated Balance Sheets

	May 31,
	2018			2017
Non-current assets	$	0.5		$	—
Accrued liabilities		(1.2	)		(2.7	)
Other liabilities and deferred income		(11.3	)		(23.9	)
Funded status at end of year	$	(12.0	)	$	(26.6	)

Schedule of amounts recognized in accumulated other comprehensive loss

	May 31,
	2018			2017
Actuarial loss	$	50.5		$	58.8
Prior service credit		(0.1	)		(0.4	)
Total	$	50.4		$	58.4

Schedule of components of pension expense charged to the consolidated statement of income

	For the Year Ended May 31,
	2018			2017			2016
Service cost	$	2.4		$	2.5		$	2.5
Interest cost		4.3			4.2			4.5
Expected return on plan assets		(7.3	)		(6.5	)		(6.5	)
Curtailment		0.3			—			—
Amortization of prior service cost		—			—			0.1
Recognized net actuarial loss		2.3			2.4			2.4
	$	2.0		$	2.6		$	3.0

Schedule of estimated amounts for plans that will be amortized from accumulated other comprehensive loss into expense over the next fiscal year

Net actuarial loss	$	1.8
Prior service cost		—
Total	$	1.8

Schedule of key weighted-average assumptions used in the measurement of the entity's projected benefit obligations

	May 31,
	2018			2017
Discount rate:
Domestic plans		4.05	%		3.82	%
International plan		1.90			2.00
Rate of compensation increase:
Domestic plans		n/a			2.50	%
International plans		3.00	%		3.00

Summary of the weighted average assumptions used to determine net periodic pension expense

	For the Year Ended May 31,
	2018			2017			2016
Discount rate:
Domestic plans		3.82	%		3.83	%		4.15	%
International plan		2.00			1.90			1.90
Rate of compensation increase:
Domestic plans		2.50	%		2.50	%		2.50	%
International plan		3.00			3.00			3.00
Expected long-term rate on plan assets:
Domestic plans		7.25	%		7.25	%		7.25	%
International plan		4.00			4.00			4.00

Schedule of actual asset allocation and target allocations

	May 31,
							Target Asset Allocation
	2018			2017
Equity securities		59	%		62	%		45 - 75	%
Fixed income securities		22			16			15 - 45	%
Other		19			22			0 - 25	%
		100	%		100	%

Schedule of fair value of pension plan assets

        The following table sets forth by level, within the fair value hierarchy, pension plan assets at their fair value as of May 31, 2018:

	Level 11		Level 22		Level 33		Total
Equity securities:
U.S. mutual funds	$	32.8	$	—	$	—	$	32.8
International mutual funds		10.4		—		—		10.4
Fixed income:
Government securities and corporate bond mutual funds		15.7		—		—		15.7
Funds-of-funds		—		53.6		7.7		61.3
Hedge funds		—		—		4.4		4.4
Insurance annuities		—		—		7.8		7.8
Cash and cash equivalents		2.1		—		—		2.1
Total investments	$	61.0	$	53.6	$	19.9	$	134.5

        The following table sets forth by level, within the fair value hierarchy, pension plan assets at their fair value as of May 31, 2017:

	Level 11		Level 22		Level 33		Total
Equity securities:
U.S. mutual funds	$	30.6	$	—	$	—	$	30.6
International mutual funds		9.5		—		—		9.5
Fixed income:
Government securities and corporate bond mutual funds		10.1		—		—		10.1
Funds-of-funds		—		51.6		7.3		58.9
Hedge funds		—		—		6.8		6.8
Cash and cash equivalents		2.9		—		—		2.9
Total investments	$	53.1	$	51.6	$	14.1	$	118.8

1	Quoted prices in active markets for identical assets that we have the ability to access as of the reporting date.
2	Inputs other than quoted prices included within Level 1 that are directly observable for the asset or indirectly observable through corroboration with observable market data.
3	Unobservable inputs, such as internally developed pricing models or third party valuations for the asset due to little or no market activity for the asset.

Schedule of reconciliation of Level 3 pension assets measured at fair value

	Hedge Funds			Fund-of-funds			Insurance Annuities		Total
Balance as of May 31, 2016	$	6.6		$	7.5		$	—	$	14.1
Sales		—			(0.8	)		—		(0.8	)
Return on plan assets related to assets still held at May 31, 2017		0.2			0.6			—		0.8
Balance as of May 31, 2017		6.8			7.3			—		14.1
Purchases		—			—			7.8		7.8
Sales		(3.0	)		—			—		(3.0	)
Return on plan assets related to assets still held at May 31, 2018		0.6			0.4			—		1.0
Balance as of May 31, 2018	$	4.4		$	7.7		$	7.8	$	19.9

Summary of estimated future pension payments

	Fiscal Year
	2019		2020		2021		2022		2023		2024 to 2028
Estimated future pension payments	$	8.0	$	6.2	$	6.0	$	6.5	$	6.9	$	34.2