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Balance Sheet Information - Equity Method Investment (Details) - NSK Warner [Member] - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Nov. 30, 2017 | Dec. 31, 2016 | Nov. 30, 2016 | Dec. 31, 2015 | Nov. 30, 2015
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity investment in NSK Warner, percent | 50.00% |  |  |  |  |
Joint Venture Partner Interest In Subsidiary | 40.00% |  |  |  |  |
Equity Method Investment, Dividends or Distributions | $ 20.2 |  | $ 34.3 |  | $ 18.0 |
Equity Method Investment, Summarized Financial Information [Abstract] |  |  |  |  |  |
Cash and securities |  | $ 104.6 |  | $ 98.6 |  |
Current assets, including cash and securities |  | 289.2 |  | 256.3 |  |
Non-current assets |  | 231.9 |  | 194.5 |  |
Current liabilities |  | 154.9 |  | 122.6 |  |
Non-current liabilities |  | 68.1 |  | 48.2 |  |
Total equity |  | 298.1 |  | 280.0 |  |
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract] |  |  |  |  |  |
Net sales |  | 669.6 |  | 601.8 |  | $ 519.0
Gross profit |  | 149.2 |  | 134.1 |  | 118.6
Net earnings |  | $ 85.2 |  | $ 71.7 |  | $ 73.3
Purchases from Equity Method Investee | $ 12.3 |  | $ 23.9 |  | $ 23.0 |

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