Balance Sheet Information - Equity Method Investment (Details) - NSK Warner [Member] - USD ($) $ in Millions	12 Months Ended
	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