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Auto Loan Receivables (Ending Managed Receivables By Major Credit Grade) (Details) - USD ($) $ in Millions | Nov. 30, 2021 | Feb. 28, 2021
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Financing Receivable, By Major Credit Grade [Line Items] |  |
Financing Receivable, Originated in Current Fiscal Year | $ 6,401.1 | $ 5,561.7
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 4,028.5 | 4,112.6
Financing Receivable, Originated Two Years before Latest Fiscal Year | 2,806.7 | 2,337.2
Financing Receivable, Originated Three Years before Latest Fiscal Year | 1,460.3 | 1,226.9
Financing Receivable, Originated Four Years before Latest Fiscal Year | 639.1 | 494.9
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 188.3 | 113.9
Total ending managed receivables | $ 15,524.0 | $ 13,847.2
Total ending managed receivables as percentage by major credit grade | 100.00% | 100.00%
Credit Grade A |  |
Financing Receivable, By Major Credit Grade [Line Items] |  |
Financing Receivable, Originated in Current Fiscal Year | $ 3,172.3 | $ 2,782.0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 1,999.2 | 2,146.5
Financing Receivable, Originated Two Years before Latest Fiscal Year | 1,454.6 | 1,146.7
Financing Receivable, Originated Three Years before Latest Fiscal Year | 693.7 | 568.9
Financing Receivable, Originated Four Years before Latest Fiscal Year | 275.2 | 199.6
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 57.6 | 30.4
Total ending managed receivables | $ 7,652.6 | $ 6,874.1
Total ending managed receivables as percentage by major credit grade | 49.30% | 49.60%
Credit Grade B |  |
Financing Receivable, By Major Credit Grade [Line Items] |  |
Financing Receivable, Originated in Current Fiscal Year | $ 2,306.4 | $ 1,993.6
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 1,446.1 | 1,424.5
Financing Receivable, Originated Two Years before Latest Fiscal Year | 977.3 | 870.1
Financing Receivable, Originated Three Years before Latest Fiscal Year | 556.2 | 476.0
Financing Receivable, Originated Four Years before Latest Fiscal Year | 260.0 | 195.5
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 80.4 | 49.2
Total ending managed receivables | $ 5,626.4 | $ 5,008.9
Total ending managed receivables as percentage by major credit grade | 36.20% | 36.20%
Credit Grade C And Other |  |
Financing Receivable, By Major Credit Grade [Line Items] |  |
Financing Receivable, Originated in Current Fiscal Year | $ 922.4 | $ 786.1
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 583.2 | 541.6
Financing Receivable, Originated Two Years before Latest Fiscal Year | 374.8 | 320.4
Financing Receivable, Originated Three Years before Latest Fiscal Year | 210.4 | 182.0
Financing Receivable, Originated Four Years before Latest Fiscal Year | 103.9 | 99.8
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 50.3 | 34.3
Total ending managed receivables | $ 2,245.0 | $ 1,964.2
Total ending managed receivables as percentage by major credit grade | 14.50% | 14.20%

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