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Restructuring Restructuring (Details) $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Sep. 30, 2014 USD ($) | Jun. 30, 2014 USD ($) | Mar. 31, 2014 USD ($) | Dec. 31, 2015 USD ($) employee labor_union | Dec. 31, 2014 USD ($) employee | Dec. 31, 2013 USD ($) | Nov. 10, 2015 | Feb. 28, 2014
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Cost, Agreements with Labor Unions, Number | labor_union |  |  |  |  |  |  |  |  | 3 |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  |  |  | $ 24.8 |  |
Restructuring expense | $ 24.4 | $ 6.3 | $ 10.5 | $ 9.4 | $ 17.8 | $ 9.6 | $ 13.0 | $ 38.4 | $ 65.7 | $ 90.8 | 39.8 |  |
Drivetrain [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Employee termination benefits, number of employees effected | employee |  |  |  |  |  |  |  |  | 450 |  |  |  |
Employee termination benefits |  |  |  |  |  |  |  |  | $ 20.1 | 50.6 | 7.5 |  |
Other restructuring charges |  |  |  |  |  |  |  |  | 7.9 | 11.2 | 0.6 |  |
Restructuring expense |  |  |  |  |  |  |  |  | $ 28.0 | $ 61.8 | 32.9 |  |
Gustav Wahler GmbH u. Co. KG and General Partner [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Employee termination benefits, number of employees effected | employee |  |  |  |  |  |  |  |  | 70 | 95 |  |  |
Employee termination benefits |  |  |  |  |  |  |  |  | $ 11.6 | $ 6.5 |  |  |
Corporate and Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring expense |  | $ 3.0 | $ 9.4 | $ 2.7 | 5.4 | $ 3.5 | $ 2.0 | $ 1.1 | 12.5 | 12.0 | 4.0 |  |
Remy International Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Employee termination benefits |  |  |  |  |  |  |  |  | 10.1 |  |  |  |
Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve | 29.4 |  |  |  | 43.9 |  |  |  | 29.4 | 43.9 | 11.3 |  |
Restructuring expense |  |  |  |  |  |  |  |  | 43.9 | 56.8 |  |  |
Payments for Restructuring |  |  |  |  |  |  |  |  | (55.0) | (18.6) |  |  |
Restructuring Reserve, Translation Adjustment |  |  |  |  |  |  |  |  | (3.8) | (5.6) |  |  |
Remy International Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  |  |  |  |  |  |  |  |  | 100.00% |
Remy International Inc. [Member] | Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring expense |  |  |  |  |  |  |  |  | 0.4 |  |  |  |
Gustav Wahler GmbH u. Co. KG and General Partner [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  |  |  |  |  |  |  |  |  |  | 100.00%
Engine [Member] | Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve | 4.1 |  |  |  | 2.0 |  |  |  | 4.1 | 2.0 | 2.9 |  |
Restructuring expense |  |  |  |  |  |  |  |  | 11.3 | 7.3 |  |  |
Payments for Restructuring |  |  |  |  |  |  |  |  | (9.0) | (7.9) |  |  |
Restructuring Reserve, Translation Adjustment |  |  |  |  |  |  |  |  | (0.2) | (0.3) |  |  |
Engine [Member] | Remy International Inc. [Member] | Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring expense |  |  |  |  |  |  |  |  | 0.0 |  |  |  |
Drivetrain [Member] | Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve | $ 25.3 |  |  |  | $ 41.9 |  |  |  | 25.3 | 41.9 | $ 8.4 |  |
Restructuring expense |  |  |  |  |  |  |  |  | 32.6 | 49.5 |  |  |
Payments for Restructuring |  |  |  |  |  |  |  |  | (46.0) | (10.7) |  |  |
Restructuring Reserve, Translation Adjustment |  |  |  |  |  |  |  |  | (3.6) | $ (5.3) |  |  |
Drivetrain [Member] | Remy International Inc. [Member] | Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring expense |  |  |  |  |  |  |  |  | $ 0.4 |  |  |  |

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