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Revenues - Commercial Vehicle Distribution and Other (Details) - Commercial Vehicle Distribution and Other - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Revenues |  |
Total revenues | $ 158.5 |
Penske Commercial Vehicles Australia |  |
Revenues |  |
Total revenues | 57.5 |
Penske Power Systems |  |
Revenues |  |
Total revenues | 100.2 |
Other |  |
Revenues |  |
Total revenues | $ 0.8 |
Without Adoption of ASC 606 |  |
Revenues |  |
Total revenues |  | $ 113.0
Without Adoption of ASC 606 | Penske Commercial Vehicles Australia |  |
Revenues |  |
Total revenues |  | 64.8
Without Adoption of ASC 606 | Penske Power Systems |  |
Revenues |  |
Total revenues |  | 47.3
Without Adoption of ASC 606 | Other |  |
Revenues |  |
Total revenues |  | $ 0.9

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