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Employee Benefit Plans (Details) - Schedule of recognized in accumulated other comprehensive loss - USD ($) $ in Millions	May 31, 2019	May 31, 2018
Pension and postretirement adjustments:
Net actuarial gain (loss)	$ (12.5)	$ (13.8)
Amount recognized in Accumulated comprehensive income (loss) before tax	13.0	14.9
Other Postretirement Benefits [Member]
Pension and postretirement adjustments:
Net actuarial gain (loss)	0.5	(1.3)
Amount recognized in Accumulated comprehensive income (loss) before tax	0.0	2.4
U.S. [Member] | Pension Plans [Member]
Pension and postretirement adjustments:
Net actuarial gain (loss)		0.0
Amount recognized in Accumulated comprehensive income (loss) before tax		0.0
U.K. [Member] | Pension Plans [Member]
Pension and postretirement adjustments:
Net actuarial gain (loss)	(13.0)	(12.5)
Amount recognized in Accumulated comprehensive income (loss) before tax	$ 13.0	$ 12.5

X

- Definition

Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (i-k)
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- Definition

Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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