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Summary of Significant Accounting Policies and Related Information - General and cash (Details)	12 Months Ended
	Feb. 28, 2018 segment $ / shares	Feb. 28, 2017 $ / shares
Summary of Significant Accounting Policies and Related Information
Common stock, par (in dollars per share) | $ / shares	$ 0.10	$ 0.10
Number of segments | segment	3

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- References

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Face amount or stated value per share of common stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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