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Pre- and Post-Modification Amortized Cost Basis Balances for Finance Receivables Modified by Portfolio Class (Detail) - Customer Retail - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2022
Financing Receivable Modifications [Line Items] |  |
Pre-Modification, Amortized Cost Basis | $ 7.5 | $ 8.1
Post-Modification, Amortized Cost Basis | 7.5 | 8.1
Fleet |  |
Financing Receivable Modifications [Line Items] |  |
Pre-Modification, Amortized Cost Basis | 7.5 | 8.1
Post-Modification, Amortized Cost Basis | $ 7.5 | $ 8.1

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