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Other income (Schedule of Other Income) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Disaggregation of Revenue [Line Items] |  |
Other income | $ 11.7 | $ 14.3
Ancillary Product Profit Sharing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 8.2 | 8.2
Remarketing Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 2.2 | 2.8
Interest [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 0.3 | 1.7
Dealer Enrollment Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 0.4 | 0.9
Dealer Support Products And Services [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 0.4 | 0.5
Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | $ 0.2 | $ 0.2

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- Definition Amount of revenue and income classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.4) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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