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Equity Method Investees (Details) - USD ($) $ in Millions |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 07, 2017 | Sep. 06, 2017 | Dec. 31, 2017 | Sep. 30, 2017 | May 31, 2017 | Sep. 30, 2016 | Jul. 31, 2016 | Jun. 30, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Equity Method Investment |  |  |  |  |  |  |  |  |  |  |
Equity method investments |  |  | $ 1,256.6 |  |  |  |  |  | $ 1,305.2 | $ 1,256.6 |
Equity in earnings of affiliates |  |  |  |  |  |  |  |  | 134.8 | 107.6 | $ 69.5
Condensed income statement information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 9,013.7 | 7,680.8 | 7,397.2
Gross profit |  |  |  |  |  |  |  |  | 2,011.7 | 1,792.4 | 1,670.4
Net income |  |  |  |  |  |  |  |  | 458.7 | 416.1 | $ 411.5
Condensed balance sheet information |  |  |  |  |  |  |  |  |  |  |
Current assets |  |  | 1,317.9 |  |  |  |  |  | 1,467.5 | 1,317.9 |
Noncurrent assets |  |  | 11,729.4 |  |  |  |  |  | 13,360.8 | 11,729.4 |
Total assets |  |  | 13,047.3 |  |  |  |  |  | 14,828.3 | 13,047.3 |
Current liabilities |  |  | 2,101.0 |  |  |  |  |  | 1,880.1 | 2,101.0 |
Noncurrent liabilities |  |  | 8,160.3 |  |  |  |  |  | 9,976.1 | 8,160.3 |
Equity |  |  | 2,786.0 |  |  |  |  |  | 2,972.1 | 2,786.0 |
Total liabilities and equity |  |  | $ 13,047.3 |  |  |  |  |  | $ 14,828.3 | 13,047.3 |
The Nix Group |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment |  |  |  |  |  |  |  |  |  |  |
Ownership percentage of equity method investment |  |  |  |  |  |  |  |  | 50.00% |  |
Ibericar Keldinich SL |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment |  |  |  |  |  |  |  |  |  |  |
Ownership percentage of equity method investment |  |  |  |  |  |  |  |  | 50.00% |  |
Nicole Group |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment |  |  |  |  |  |  |  |  |  |  |
Ownership percentage of equity method investment |  |  |  |  |  |  |  |  | 49.00% |  |
Penske Commercial Leasing Australia |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment |  |  |  |  |  |  |  |  |  |  |
Ownership percentage of equity method investment |  |  |  |  |  |  |  |  | 28.00% |  |
Ownership interest sold (as a percent) |  |  |  | 5.00% |  | 12.00% |  |  |  |  |
Penske Vehicle Services |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment |  |  |  |  |  |  |  |  |  |  |
Ownership interest sold (as a percent) |  |  | 31.00% |  |  |  |  |  |  |  |
National Powersport Auctions |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment |  |  |  |  |  |  |  |  |  |  |
Ownership interest sold (as a percent) |  |  |  |  | 7.00% |  |  |  |  |  |
PTL |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment |  |  |  |  |  |  |  |  |  |  |
Equity method investments |  |  | $ 1,185.6 |  |  |  |  |  | $ 1,237.4 | $ 1,185.6 |
PTL |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment |  |  |  |  |  |  |  |  |  |  |
Ownership acquired (as a percent) | 5.50% |  |  | 5.50% |  |  | 14.40% |  |  |  |
Ownership interest in Penske Truck Leasing Co (as a percent) |  | 23.40% |  |  |  |  | 23.40% | 9.00% | 28.90% |  |

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