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Goodwill and Other Intangibles - Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Changes in the carrying amount of goodwill |  |  |  |
Net goodwill balance, January 1 | $ 1,205.7 |  |  |
Ending balance, December 31 | $ 1,757.7 |  | $ 1,205.7 |
Goodwill impairment test, weighted average cost of capital discount rate for future cash flow | 10.00% |  |  |
Sensitivity analysis Increase in discount rate | 1.00% |  |  |
Sensitivity analysis decrease in operating margin assumption | 1.00% |  |  |
Engine [Member] |  |  |  |
Changes in the carrying amount of goodwill |  |  |  |
Gross goodwill balance, January 1 | $ 1,362.0 |  | 1,331.9 |
Accumulated impairment losses, January 1 |  |  | (501.8) | $ (501.8)
Net goodwill balance, January 1 | 860.2 |  | 830.1 |
Acquisitions | 11.6 | [1] | 76.9 |
Translation adjustment and other | (35.4) |  | (46.8) |
Ending balance, December 31 | 836.4 |  | 860.2 |
Drivetrain [Member] |  |  |  |
Changes in the carrying amount of goodwill |  |  |  |
Gross goodwill balance, January 1 | 345.7 |  | 367.1 |
Accumulated impairment losses, January 1 |  |  | (0.2) | $ (0.2)
Net goodwill balance, January 1 | 345.5 |  | 366.9 |
Acquisitions | 584.7 |  | 0.0 |
Translation adjustment and other | (8.9) |  | (21.4) |
Ending balance, December 31 | $ 921.3 |  | $ 345.5 |
[1] | *Acquisitions relate to the Company's 2015 purchases of Remy and BERU Diesel and the 2014 purchase of Gustav Wahler GmbH u. Co. KG and its general partner.

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