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Auto Loan Receivables (Auto Loan Receivables, Net) (Details) (USD $)
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May 31, 2014
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Feb. 28, 2014
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May 31, 2013
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Feb. 28, 2013
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| Non-recourse notes payable | $ 7,630,000,000 | $ 7,250,000,000 | ||||||||
| Total ending managed receivables | 7,573,800,000 | [1],[2] | 7,184,400,000 | [1],[2] | ||||||
| Accrued interest and fees | 31,200,000 | 26,300,000 | ||||||||
| Other | 18,100,000 | 7,000,000 | ||||||||
| Less allowance for loan losses | (75,400,000) | (69,900,000) | (60,900,000) | (57,300,000) | ||||||
| Auto loan receivables, net | 7,547,665,000 | 7,147,848,000 | ||||||||
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Warehouse Facilities [Member]
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| Total ending managed receivables | 964,000,000 | 879,000,000 | ||||||||
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Term Securitizations [Member]
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| Total ending managed receivables | 6,409,000,000 | 6,145,500,000 | ||||||||
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Other Receivables [Member]
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| Total ending managed receivables | $ 200,800,000 | $ 159,900,000 | ||||||||
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