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Auto Loan Receivables (Ending Managed Receivables By Major Credit Grade) (Details) - USD ($) $ in Millions | May 31, 2021 | Feb. 28, 2021
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Financing Receivable, By Major Credit Grade [Line Items] |  |
Financing Receivable, Originated in Current Fiscal Year | $ 2,406.4 | $ 5,561.7
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 5,002.9 | 4,112.6
Financing Receivable, Originated Two Years before Latest Fiscal Year | 3,633.0 | 2,337.2
Financing Receivable, Originated Three Years before Latest Fiscal Year | 2,006.6 | 1,226.9
Financing Receivable, Originated Four Years before Latest Fiscal Year | 997.0 | 494.9
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 420.0 | 113.9
Total ending managed receivables | $ 14,465.9 | $ 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 | $ 1,107.2 | $ 2,782.0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 2,481.5 | 2,146.5
Financing Receivable, Originated Two Years before Latest Fiscal Year | 1,890.9 | 1,146.7
Financing Receivable, Originated Three Years before Latest Fiscal Year | 974.8 | 568.9
Financing Receivable, Originated Four Years before Latest Fiscal Year | 453.2 | 199.6
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 150.9 | 30.4
Total ending managed receivables | $ 7,058.5 | $ 6,874.1
Total ending managed receivables as percentage by major credit grade | 48.80% | 49.60%
Credit Grade B |  |
Financing Receivable, By Major Credit Grade [Line Items] |  |
Financing Receivable, Originated in Current Fiscal Year | $ 891.8 | $ 1,993.6
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 1,802.0 | 1,424.5
Financing Receivable, Originated Two Years before Latest Fiscal Year | 1,261.5 | 870.1
Financing Receivable, Originated Three Years before Latest Fiscal Year | 752.7 | 476.0
Financing Receivable, Originated Four Years before Latest Fiscal Year | 392.7 | 195.5
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 172.3 | 49.2
Total ending managed receivables | $ 5,273.0 | $ 5,008.9
Total ending managed receivables as percentage by major credit grade | 36.40% | 36.20%
Credit Grade C And Other |  |
Financing Receivable, By Major Credit Grade [Line Items] |  |
Financing Receivable, Originated in Current Fiscal Year | $ 407.4 | $ 786.1
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 719.4 | 541.6
Financing Receivable, Originated Two Years before Latest Fiscal Year | 480.6 | 320.4
Financing Receivable, Originated Three Years before Latest Fiscal Year | 279.1 | 182.0
Financing Receivable, Originated Four Years before Latest Fiscal Year | 151.1 | 99.8
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 96.8 | 34.3
Total ending managed receivables | $ 2,134.4 | $ 1,964.2
Total ending managed receivables as percentage by major credit grade | 14.80% | 14.20%

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