Spinoff Tables 1 (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to Acquire Productive Assets									$ 137.5	$ 105.6		$ 126.8
Net sales	$ 654.8	$ 657.4	$ 673.6	$ 684.0	$ 714.4	$ 707.4	$ 728.0	$ 722.5	2,669.8	2,872.3	$ 20.6	3,076.2
Cost of Goods Sold									1,975.0	2,078.4		2,178.2
Gross Profit	$ 164.1	$ 167.5	$ 182.3	$ 180.9	$ 190.9	$ 195.4	$ 205.1	$ 202.5	694.8	793.9		898.0
Selling, General and Administrative Expense									450.0	494.3		542.5
Interest expense									(33.5)	(33.4)		(28.7)
Other Nonoperating Income (Expense)									0.9	7.5		2.7
Income (Loss) From Continuing Operations Before Income Taxes									222.1	(189.6)		204.0
Income Tax Expense (Benefit)									69.2	(121.6)		54.7
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent									$ 0.0	$ 0.0		24.0
TimkenSteel [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales												786.2
Cost of Goods Sold												642.0
Gross Profit												144.2
Selling, General and Administrative Expense												46.4
Transaction Costs from Spinoff												57.1
Interest expense												(0.8)
Other Nonoperating Income (Expense)												(0.1)
Income (Loss) From Continuing Operations Before Income Taxes												40.0
Income Tax Expense (Benefit)												16.0
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent												$ 24.0