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Summary of Significant Accounting Policies and Related Information - General and cash (Details)	12 Months Ended
	Feb. 28, 2017 item $ / shares	Feb. 29, 2016 $ / shares
Basis of Presentation and Conventions Used in this Report
Common shares, par value (in dollars per share) | $ / shares	$ 0.10	$ 0.10
Number of segments | item	4

X

- Definition

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

+ Details

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X

- Definition

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.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

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