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Segment Reporting Sales and Segment Adjusted EBITDA (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |
Sales Revenue, Goods, Net, Inclusive of Intersegment Sales | $ 1,954.7 | $ 1,863.6 | $ 6,002.0 | $ 4,912.9
Sales Revenue, Goods, Net, Intersegment Sales | 137.7 | 139.2 | 425.7 | 380.8
Revenues | 1,817.0 | 1,724.4 | 5,576.3 | 4,532.1
Total Segment Adjusted EBITDA | 275.0 | 297.8 | 939.9 | 807.2
Driveline [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales Revenue, Goods, Net, Inclusive of Intersegment Sales | 1,068.0 | 1,007.9 | 3,258.8 | 3,028.7
Sales Revenue, Goods, Net, Intersegment Sales | 0.3 | 0.2 | 0.7 | 1.1
Revenues | 1,067.7 | 1,007.7 | 3,258.1 | 3,027.6
Total Segment Adjusted EBITDA | 159.3 | 181.5 | 514.2 | 513.7
Metal Forming [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales Revenue, Goods, Net, Inclusive of Intersegment Sales | 382.2 | 368.2 | 1,176.3 | 887.5
Sales Revenue, Goods, Net, Intersegment Sales | 108.8 | 106.8 | 324.0 | 315.1
Revenues | 273.4 | 261.4 | 852.3 | 572.4
Total Segment Adjusted EBITDA | 66.9 | 70.7 | 231.3 | 170.5
Powertrain [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales Revenue, Goods, Net, Inclusive of Intersegment Sales | 285.4 | 260.9 | 865.6 | 544.5
Sales Revenue, Goods, Net, Intersegment Sales | 3.3 | 3.8 | 12.9 | 6.0
Revenues | 282.1 | 257.1 | 852.7 | 538.5
Total Segment Adjusted EBITDA | 34.3 | 36.8 | 131.4 | 88.7
Casting [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales Revenue, Goods, Net, Inclusive of Intersegment Sales | 219.1 | 226.6 | 701.3 | 452.2
Sales Revenue, Goods, Net, Intersegment Sales | 25.3 | 28.4 | 88.1 | 58.6
Revenues | 193.8 | 198.2 | 613.2 | 393.6
Total Segment Adjusted EBITDA | $ 14.5 | $ 8.8 | $ 63.0 | $ 34.3

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- Definition Segment Adjusted EBITDA is defined as earnings before interest, income taxes, depreciation and amortization for our reportable segments, excluding the impact of restructuring and acquisition-related costs, debt refinancing and redemption costs and non-recurring items + References No definition available. + Details
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