Receivables (Details 4) (USD $) In Millions, unless otherwise specified	Apr. 30, 2013 item	Apr. 30, 2012 item
Receivables Related to Troubled Debt Restructurings
Receivable contracts in troubled debt restructuring, number	67	102
Receivables in troubled debt restructurings, aggregate balances, pre-modification	$ 15.0	$ 2.7
Receivables in troubled debt restructurings, aggregate balances, post-modification	$ 14.4	$ 2.5

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 33

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953676-111524

+ Details

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- Definition

Amount of investment in financing receivables (after modification) modified by troubled debt restructurings.

+ References

+ Details

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- Definition

Amount of investment in financing receivables (before modification) modified by troubled debt restructurings.

+ References

+ Details

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