Quarterly report pursuant to Section 13 or 15(d)

Nonrecourse Debt - Additional Information (Detail)

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Nonrecourse Debt - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
1 Months Ended
Apr. 30, 2013
Sep. 30, 2013
Debt Disclosure [Abstract]    
Financing receivables carrying value   $ 184.2
Repayment of nonrecourse debt $ 18.5