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Auto Loan Receivables (Ending Managed Receivables By Major Credit Grade) (Details) - USD ($) $ in Millions | Feb. 28, 2021 | Feb. 29, 2020
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Financing Receivable, By Major Credit Grade [Line Items] |  |
Total ending managed receivables | $ 13,847.2 | $ 13,617.8
Total ending managed receivables as percentage by major credit grade | 100.00% | 100.00%
Financing Receivable, Year One, Originated, Current Fiscal Year | $ 5,561.7 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 4,112.6 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 2,337.2 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 1,226.9 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 494.9 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 113.9 |
Credit Grade A [Member] |  |
Financing Receivable, By Major Credit Grade [Line Items] |  |
Total ending managed receivables | $ 6,874.1 | $ 6,915.9
Total ending managed receivables as percentage by major credit grade | 49.60% | 50.80%
Financing Receivable, Year One, Originated, Current Fiscal Year | $ 2,782.0 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 2,146.5 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 1,146.7 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 568.9 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 199.6 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 30.4 |
Credit Grade B |  |
Financing Receivable, By Major Credit Grade [Line Items] |  |
Total ending managed receivables | $ 5,008.9 | $ 4,841.2
Total ending managed receivables as percentage by major credit grade | 36.20% | 35.60%
Financing Receivable, Year One, Originated, Current Fiscal Year | $ 1,993.6 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 1,424.5 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 870.1 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 476.0 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 195.5 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 49.2 |
Credit Grade C And Other |  |
Financing Receivable, By Major Credit Grade [Line Items] |  |
Total ending managed receivables | $ 1,964.2 | $ 1,860.7
Total ending managed receivables as percentage by major credit grade | 14.20% | 13.60%
Financing Receivable, Year One, Originated, Current Fiscal Year | $ 786.1 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 541.6 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 320.4 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 182.0 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 99.8 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | $ 34.3 |

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