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Employee Benefit Plans (Details) - Schedule of recognized in accumulated other comprehensive loss - USD ($) $ in Millions	May 31, 2017	May 31, 2016
Pension and post-retirement adjustments:
Net actuarial gain (loss)	$ (70.9)	$ (69.1)
Amount recognized in Accumulated comprehensive income (loss) before tax	(70.9)	(69.1)
Other Postretirement Benefits [Member]
Pension and post-retirement adjustments:
Net actuarial gain (loss)	(3.3)	(11.9)
Amount recognized in Accumulated comprehensive income (loss) before tax	(3.3)	(11.9)
U.S. [Member] | Pension Plans [Member]
Pension and post-retirement adjustments:
Net actuarial gain (loss)	(51.3)	(44.0)
Amount recognized in Accumulated comprehensive income (loss) before tax	(51.3)	(44.0)
U.K. [Member] | Pension Plans [Member]
Pension and post-retirement adjustments:
Net actuarial gain (loss)	(16.3)	(13.2)
Amount recognized in Accumulated comprehensive income (loss) before tax	$ (16.3)	$ (13.2)

X

- Definition

The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (j)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (i-k)
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580

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X

- Definition

The pretax net amount of gains and losses that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases or decreases in other comprehensive income as they arise. Gains and losses are due to changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (j)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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