Acquisitions and Divestitures Acquisitions and Divestitures - Divestitures Narrative (Details) - USD ($) $ in Millions			3 Months Ended									12 Months Ended
	Jul. 05, 2017	Apr. 30, 2015	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales			$ 778.0	$ 771.4	$ 750.6	$ 703.8	$ 654.8	$ 657.4	$ 673.6	$ 684.0		$ 3,003.8	$ 2,669.8	$ 2,872.3	$ 20.6
Proceeds from Divestiture of Businesses		$ 2.8									$ 43.4
Gain (Loss) on Disposition of Business		$ 0.3									$ 29.0	0.0	0.0	28.7
Asset Impairment Charges												$ 0.1	$ 3.9	$ 3.3
ABC Bearings [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Business Acquisition, Effective Date of Acquisition	Jul. 05, 2017