Gain on Sale of Product Line (Detail) - USD ($) $ in Millions |
1 Months Ended | 7 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Aug. 31, 2014 |
Jul. 31, 2014 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||||
| Gain on sale of product line | $ 0.0 | $ 0.0 | $ 33.9 | ||
| Industrial Technologies | Electric Vehicle Systems/Hybrid Product Line [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | |||||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||||
| Sales price | $ 87.0 | ||||
| Revenues prior to sale | $ 60.0 | ||||
| Gain on sale of product line | 34.0 | ||||
| Gain on sale of product line, net of tax | $ 26.0 | ||||