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Segment Information (Details 2) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Revenues and segment income by reportable segment |  |  |  |
Revenue | $ 4,904.4 | $ 4,370.5 | $ 9,375.5 | $ 8,385.7
Segment income | 143.7 | 122.7 | 259.6 | 225.0
Intersegment Elimination |  |  |  |
Revenues and segment income by reportable segment |  |  |  |
Revenue | (0.3) | (1.6) | (0.6) | (2.3)
Retail Automotive | Operating segments |  |  |  |
Revenues and segment income by reportable segment |  |  |  |
Revenue | 4,538.6 | 4,256.5 | 8,713.6 | 8,175.7
Segment income | 120.5 | 107.7 | 223.6 | 201.6
Retail Commercial Truck Dealership | Operating segments |  |  |  |
Revenues and segment income by reportable segment |  |  |  |
Revenue | 241.9 |  | 434.6 |
Segment income | 10.4 | 0.8 | 17.8 | 1.4
Other | Operating segments |  |  |  |
Revenues and segment income by reportable segment |  |  |  |
Revenue | 124.2 | 115.6 | 227.9 | 212.3
Segment income | $ 12.8 | $ 14.2 | $ 18.2 | $ 22.0

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