Goodwill and Other Intangible Assets - Narrative (Details) $ in Millions		3 Months Ended		12 Months Ended
	Sep. 01, 2015 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2016 USD ($) segment	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Goodwill [Line Items]
Document Period End Date				Dec. 31, 2016
Finite-Lived Intangible Assets, Gross				$ 575.8	$ 547.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net				72.6	213.6	$ 21.4
Payments to Acquire Businesses, Net of Cash Acquired				$ 72.6	213.3	21.7
Number of Reporting Units				2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 27.9	$ 63.9
Intangible assets acquired useful lives minimum					2 years
Acquired Finite Lived Intangible Assets Useful Life Maximum					20 years
Goodwill, Acquired During Period				$ 30.6	$ 70.8
Goodwill, Impairment Loss			$ (86.3)
Document Fiscal Year Focus				2016
Finite-Lived Intangible Assets, Accumulated Amortization				$ 332.9	301.0
Finite-Lived Intangible Assets, Remaining Amortization Period				19 years 1 month 6 days
Goodwill and Other Intangible Assets (Textual) [Abstract]
Amortization expense for intangible assets				$ 36.2	36.2	$ 21.5
Future Amortization Expense Year 2016				33.0
Future Amortization Expense Year 2017				28.4
Future Amortization Expense Year 2018				24.0
Future Amortization Expense Year 2019				19.6
Future Amortization Expense Year 2020				16.1
Timken Belts [Member]
Goodwill [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ 27.9
Payments to Acquire Businesses, Net of Cash Acquired		$ 0.7
Business Acquisition, Goodwill, Expected Tax Deductible Amount	$ 59.7
Intangible Assets, Weighted Average Life	15 years
Goodwill, Subsequent Recognition of Deferred Tax Asset	$ 11.1
Lease Agreements [Member]
Goodwill [Line Items]
Finite-Lived Intangible Assets, Gross				0.1	0.0
Finite-Lived Intangible Assets, Accumulated Amortization				$ 0.0	0.0
Mobile Industries [Member]
Goodwill [Line Items]
Number of Reporting Units | segment				3
Goodwill, Acquired During Period				$ 0.7	8.2
Process Industries [Member]
Goodwill [Line Items]
Number of Reporting Units | segment				2
Goodwill, Acquired During Period				$ 29.9	$ 62.6