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Segment Information (Details 2) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Revenues and segment income by reportable segment |  |  |  |
Revenue | $ 4,960.1 | $ 4,396.7 | $ 14,363.6 | $ 12,806.4
Segment income | 129.3 | 117.0 | 388.4 | 339.8
Intersegment Elimination |  |  |  |
Revenues and segment income by reportable segment |  |  |  |
Revenue | (0.5) | (1.6) | (1.1) | (3.8)
Retail Automotive | Operating segments |  |  |  |
Revenues and segment income by reportable segment |  |  |  |
Revenue | 4,585.8 | 4,295.6 | 13,327.5 | 12,495.3
Segment income | 107.8 | 101.5 | 330.9 | 300.8
Retail Commercial Truck Dealership | Operating segments |  |  |  |
Revenues and segment income by reportable segment |  |  |  |
Revenue | 268.5 |  | 703.1 |
Segment income | 10.3 | 1.5 | 28.1 | 2.9
Other | Operating segments |  |  |  |
Revenues and segment income by reportable segment |  |  |  |
Revenue | 106.3 | 102.7 | 334.1 | 314.9
Segment income | $ 11.2 | $ 14.0 | $ 29.4 | $ 36.1

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