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Goodwill and Other Intangibles - Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Changes in the carrying amount of goodwill |  |  |  |
Net goodwill balance, January 1 | $ 1,757.7 |  |  |
Ending balance, December 31 | $ 1,702.2 |  | $ 1,757.7 |
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 | $ 1,338.2 |  | 1,362.0 |
Accumulated impairment losses, January 1 |  |  | (501.8) | $ (501.8)
Net goodwill balance, January 1 | 836.4 |  | 860.2 |
Acquisitions | 0.0 | [1] | 11.6 |
Translation adjustment and other | (14.2) |  | (35.4) |
Ending balance, December 31 | 822.2 |  | 836.4 |
Drivetrain [Member] |  |  |  |
Changes in the carrying amount of goodwill |  |  |  |
Gross goodwill balance, January 1 | 921.5 |  | 345.7 |
Accumulated impairment losses, January 1 |  |  | (0.2) | $ (0.2)
Net goodwill balance, January 1 | 921.3 |  | 345.5 |
Acquisitions | (12.1) |  | 584.7 |
Divestitures | (24.2) |  |  |
Translation adjustment and other | (5.0) |  | (8.9) |
Ending balance, December 31 | $ 880.0 |  | $ 921.3 |
[1] | *Acquisitions relate to the Company's 2015 purchases of Remy and BERU Diesel and fair value adjustments in 2016 based on new information obtained during the measurement period for Remy acquisition.** Divestitures relate to the Company's 2016 disposition of Remy light vehicle aftermarket business and Divgi-Warner Private Limited. .

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