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Interim Financial Statements (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 30, 2015 item | Mar. 31, 2015 | Sep. 30, 2015 USD ($) item | Jun. 30, 2015 item | Sep. 30, 2014 USD ($) | Sep. 30, 2015 USD ($) item | Sep. 30, 2014 USD ($) item | Dec. 31, 2014 USD ($) | Nov. 30, 2014
Interim Financial Statements.. |  |  |  |  |  |  |  |  |
Total revenues | $ |  |  | $ 4,960.1 |  | $ 4,396.7 | $ 14,363.6 | $ 12,806.4 |  |
Max Cycles |  |  |  |  |  |  |  |  |
Interim Financial Statements |  |  |  |  |  |  |  |  |
Ownership interest sold (as a percent) | 50.00% |  |  |  |  |  |  |  |
Commercial Vehicle Distribution |  |  |  |  |  |  |  |  |
Interim Financial Statements |  |  |  |  |  |  |  |  |
Minimum number of dealership locations |  |  |  |  |  | 70 |  |  |
Number of commercial vehicle dealerships |  |  |  |  |  | 3 |  |  |
Retail Automotive Franchise |  |  |  |  |  |  |  |  |
Interim Financial Statements |  |  |  |  |  |  |  |  |
Minimum number of vehicle brands offered |  |  |  |  |  | 40 |  |  |
Number of acquired franchises |  |  |  |  |  | 1 | 2 |  |
Number of franchises disposed |  |  |  | 2 |  | 2 |  |  |
Interim Financial Statements.. |  |  |  |  |  |  |  |  |
Total revenues | $ |  |  |  |  |  |  |  | $ 16,700.0 |
Total number of owned and operated franchises | 352 |  | 352 |  |  | 352 |  |  |
Number of owned and operated franchises in US | 178 |  | 178 |  |  | 178 |  |  |
Number of owned and operated franchises outside US | 174 |  | 174 |  |  | 174 |  |  |
Minimum number of vehicles retailed and wholesaled |  |  |  |  |  | 390,000 |  |  |
Retail Commercial Truck Dealership |  |  |  |  |  |  |  |  |
Interim Financial Statements |  |  |  |  |  |  |  |  |
Number of acquired franchises |  |  |  |  |  | 2 |  |  |
Number of operating locations |  |  |  |  |  | 16 |  |  |
Ownership interest (as a percent) | 96.00% |  | 96.00% |  |  | 96.00% |  |  | 91.00%
Ownership percentage of Equity Method Investment |  |  |  |  | 32.00% |  | 32.00% |  |
Number of full service retail locations operated | 10 |  | 10 |  |  | 10 |  |  |
Number of full service retail locations acquired |  |  |  |  |  | 2 |  |  |
Ownership acquired (as a percentage) | 5.00% |  | 5.00% |  |  | 5.00% |  |  |
German Automotive Dealership Group |  |  |  |  |  |  |  |  |
Interim Financial Statements |  |  |  |  |  |  |  |  |
Additional ownership interest acquired (as a percent) |  |  | 10.00% |  |  |  |  |  |
Ownership interest (as a percent) | 60.00% |  | 60.00% |  |  | 60.00% |  |  |
Penske Truck Leasing Co., L.P. |  |  |  |  |  |  |  |  |
Interim Financial Statements |  |  |  |  |  |  |  |  |
Limited partnership interest (as a percent) |  | 9.00% |  |  |  | 9.00% |  |  |
Revenues | Geographic | U.S. and Puerto Rico |  |  |  |  |  |  |  |  |
Interim Financial Statements |  |  |  |  |  |  |  |  |
Automotive dealership revenue (as a percent) |  |  |  |  |  | 60.00% |  |  |
Revenues | Geographic | Outside the U.S. |  |  |  |  |  |  |  |  |
Interim Financial Statements |  |  |  |  |  |  |  |  |
Automotive dealership revenue (as a percent) |  |  |  |  |  | 40.00% |  |  |
Revenues | Premium brands |  |  |  |  |  |  |  |  |
Interim Financial Statements |  |  |  |  |  |  |  |  |
Automotive dealership revenue (as a percent) |  |  |  |  |  | 72.00% |  |  |

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