Spinoff Tables 2 (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Cash Equivalents	$ 129.6	$ 278.8		$ 384.6	$ 586.4
Accounts Receivable, Net, Current	454.6	475.7
Inventory, Net	543.2	585.5
Deferred Tax Assets, Net of Valuation Allowance, Current	0.0	49.9
Other Assets, Current	56.1	51.5
Property, Plant and Equipment, Net	777.8	780.5		855.8
Goodwill	327.3	259.5		$ 346.1
Non-current pension assets	86.3	176.2
Intangible Assets, Net (Excluding Goodwill)	271.3	239.8
Other Assets, Noncurrent	50.3	52.3
Total Assets	2,785.3	3,001.4
Accounts Payable, Current	159.7	143.9
Employee-related Liabilities, Current	102.3	146.7
Accrued Income Taxes, Current	13.1	80.2
Other Liabilities, Current	153.1	155.0
Long-term Debt, Excluding Current Maturities	580.6	522.1
Defined Benefit Pension Plan, Liabilities, Noncurrent	146.9	165.9
Other Postretirement Defined Benefit Plan, Liabilities, Noncurrent	136.1	141.8
Deferred Tax Liabilities, Net, Noncurrent	3.6	4.1
Other Liabilities, Noncurrent	$ 68.2	$ 44.6
TimkenSteel [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Cash Equivalents			$ 46.5
Accounts Receivable, Net, Current			178.9
Inventory, Net			238.2
Deferred Tax Assets, Net of Valuation Allowance, Current			20.2
Other Assets, Current			4.0
Property, Plant and Equipment, Net			751.6
Goodwill			12.6
Non-current pension assets			83.5
Intangible Assets, Net (Excluding Goodwill)			11.2
Other Assets, Noncurrent			2.6
Total Assets			1,349.3
Accounts Payable, Current			132.8
Employee-related Liabilities, Current			52.0
Accrued Income Taxes, Current			0.1
Other Liabilities, Current			15.9
Long-term Debt, Excluding Current Maturities			130.2
Defined Benefit Pension Plan, Liabilities, Noncurrent			24.5
Other Postretirement Defined Benefit Plan, Liabilities, Noncurrent			68.3
Deferred Tax Liabilities, Net, Noncurrent			91.7
Other Liabilities, Noncurrent			10.7
Liabilities			$ 526.2