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v3.19.3.a.u2

Restructuring and Acquisition-Related Costs - Restructuring Reserve Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 39.8 | $ 44.2 | $ 17.4
Employee Severance [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 19.4 | 2.5 | 2.0
Facility Closing [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 20.4 | 11.7 | 13.9
2019 Restructuring Plan [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 18.0 |  |
Asset Impairment [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 0.0 | $ 30.0 | $ 1.5
Minimum [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and related cost, expected cost remaining | 20.0 |  |
Maximum [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and related cost, expected cost remaining | 30.0 |  |
Driveline [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 6.4 |  |
Metal Forming [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 21.5 |  |
Casting [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 0.7 |  |

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