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Other Income (Disaggregation of Revenue) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Disaggregation of Revenue [Line Items] |  |
Other income | $ 16.9 | $ 15.3
Transferred over Time [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 13.3 |
Transferred at Point in Time [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 3.6 |
Third Party Providers [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 13.2 |
Dealers [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 3.7 |
Ancillary Product Profit Sharing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 7.3 | 7.5
Ancillary Product Profit Sharing [Member] | Transferred over Time [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 7.3 |
Ancillary Product Profit Sharing [Member] | Transferred at Point in Time [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 0.0 |
Ancillary Product Profit Sharing [Member] | Third Party Providers [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 7.3 |
Ancillary Product Profit Sharing [Member] | Dealers [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 0.0 |
Interest [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 5.8 | 4.1
Interest [Member] | Transferred over Time [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 5.8 |
Interest [Member] | Transferred at Point in Time [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 0.0 |
Interest [Member] | Third Party Providers [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 5.8 |
Interest [Member] | Dealers [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 0.0 |
Remarketing Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 3.3 | 3.0
Remarketing Fees [Member] | Transferred over Time [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 0.0 |
Remarketing Fees [Member] | Transferred at Point in Time [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 3.3 |
Remarketing Fees [Member] | Third Party Providers [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 0.0 |
Remarketing Fees [Member] | Dealers [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 3.3 |
Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 0.5 | $ 0.7
Other [Member] | Transferred over Time [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 0.2 |
Other [Member] | Transferred at Point in Time [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 0.3 |
Other [Member] | Third Party Providers [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | 0.1 |
Other [Member] | Dealers [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Other income | $ 0.4 |

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