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Segment Information - Revenue by Product Category, Net of Intercompany Balances (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Revenue from External Customer [Line Items] |  |  |
Revenue | $ 2,585.3 | $ 2,405.4 | $ 2,485.6
Pumps and complementary products |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue | 718.8 | 745.1 | 1,025.9
Pump support and maintenance services |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue | 88.4 | 84.7 | 87.8
Brake component products |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue | 979.7 | 873.4 | 656.7
Shock absorber equipment |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue | 196.0 | 109.6 | 110.2
Connectors |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue | 317.9 | 309.1 | 327.9
Aerospace control components |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue | 223.1 | 220.8 | 210.7
Industrial control components |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue | $ 61.4 | $ 62.7 | $ 66.4

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