Spinoff Tables 1 (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to Acquire Productive Assets									$ 105.6		$ 126.8	$ 133.6
Net sales	$ 714.4	$ 707.4	$ 728.0	$ 722.5	$ 762.2	$ 788.0	$ 789.2	$ 736.8	2,872.3	$ 20.6	3,076.2	3,035.4
Cost of Goods Sold									2,078.4		2,178.2	2,167.0
Gross Profit	$ 190.9	$ 195.4	$ 205.1	$ 202.5	220.8	225.5	233.6	218.1	793.9		898.0	868.4
Selling, General and Administrative Expense									494.3		542.5	546.6
Transaction Costs from Spinoff											57.0	13.0
Interest expense									(33.4)		(28.7)	(24.4)
Other Nonoperating Income (Expense)									7.5		2.7	(1.3)
(Loss) Income From Continuing Operations Before Income Taxes									(189.6)		204.0	290.1
Income Tax Expense (Benefit)									(121.6)		54.7	114.6
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent					$ 5.3	$ (11.0)	$ 6.2	$ 23.5	$ 0.0		24.0	87.5
TimkenSteel [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales											786.2	1,305.8
Cost of Goods Sold											642.0	1,082.2
Gross Profit											144.2	223.6
Selling, General and Administrative Expense											46.4	80.5
Transaction Costs from Spinoff											57.1	13.0
Interest expense											(0.8)	0.0
Other Nonoperating Income (Expense)											(0.1)	3.0
(Loss) Income From Continuing Operations Before Income Taxes											40.0	127.1
Income Tax Expense (Benefit)											16.0	39.6
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent											$ 24.0	$ 87.5