-- None. No documentation exists for this element. --

No definition available.

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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-Name Accounting Standards Codification
-Topic 350
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-Section 50
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-SubTopic 30
-Section 45
-Paragraph 2
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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Goodwill and Other Intangibles - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended		12 Months Ended
	Aug. 31, 2018	Feb. 28, 2019	Feb. 28, 2018	May 31, 2018	May 31, 2017
Goodwill and Other Intangibles (Details) [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss		$ 39.6	$ 39.6	$ 39.6	$ 39.6
Amortizable intangible assets acquired		0.6	1.5	3.3
Amortization expense		$ 2.0	$ 1.6	$ 2.1
Useful life		3 years 6 months
U.K. Based Book Business [Member]
Goodwill and Other Intangibles (Details) [Line Items]
Amortizable intangible assets acquired	$ 0.6