The Timken Company (TKR) 10-Q 4 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013
Document and Entity Information [Abstract]	'
Document Type	'10-Q
Amendment Flag	'false
Document Period End Date	30-Sep-13
Document Fiscal Year Focus	'2013
Document Fiscal Period Focus	'Q3
Entity Registrant Name	'Timken Co.
Entity Central Index Key	'0000098362
Current Fiscal Year End Date	'--12-31
Entity Filer Category	'Large Accelerated Filer
Entity Common Stock, Shares Outstanding	97,636,674

Consolidated_Statements_of_Inc

Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]	'	'	'	'
Net sales	$1,061.50	$1,142.50	$3,277.90	$3,906.70
Cost of products sold	809.8	843.6	2,449.60	2,818.90
Gross Profit	251.7	298.9	828.3	1,087.80
Selling, general and administrative expenses	159	152.7	472.2	480.4
Impairment and restructuring charges	3.7	11.9	11.6	28.8
Operating Income	89	134.3	344.5	578.6
Interest expense	-4.9	-7.3	-17.5	-24
Interest income	0.5	0.6	1.5	2
Continued Dumping & Subsidy Offset Act (CDSOA) receipts, net of expense	-0.1	-0.9	-0.5	108.6
Other income (expense), net	0.4	1.4	-0.4	-3.7
Income Before Income Taxes	84.9	128.1	327.6	661.5
Provision for income taxes	32.4	47	117.3	241
Net Income	52.5	81.1	210.3	420.5
Less: Net income attributable to noncontrolling interest	0.3	0.2	0.2	0.3
Net Income attributable to The Timken Company	$52.20	$80.90	$210.10	$420.20
Net Income per Common Share attributable to The Timken Company Common Shareholders	'	'	'	'
Basic earnings per share	$0.55	$0.84	$2.20	$4.32
Diluted earnings per share	$0.54	$0.83	$2.18	$4.28
Dividends per share	$0.23	$0.23	$0.69	$0.69

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net Income	$52.50	$81.10	$210.30	$420.50
Other comprehensive income, net of tax:	'	'	'	'
Foreign currency translation adjustments	15.2	16.5	-19.3	0.5
Pension and postretirement liability adjustment	14.3	12.2	71.1	34.2
Change in fair value of marketable securities	0	-0.2	0	-0.7
Change in fair value of derivative financial instruments	-1.2	-0.9	0	0.5
Other comprehensive income	28.3	27.6	51.8	34.5
Comprehensive Income	80.8	108.7	262.1	455
Less: comprehensive (loss) income attributable to noncontrolling interest	-3.2	0.2	-7.6	0.2
Comprehensive Income attributable to The Timken Company	$84	$108.50	$269.70	$454.80

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Current Assets	'	'
Cash and cash equivalents	$418.10	$586.40
Accounts receivable, less allowances: 2013 – $11.4 million; 2012 – $12.1 million	593.7	546.7
Inventories, net	856.1	862.1
Deferred income taxes	80.1	98.6
Deferred charges and prepaid expenses	32.9	12.6
Other current assets	69.1	67.7
Total Current Assets	2,050	2,174.10
Property, Plant and Equipment, net	1,498.30	1,405.30
Other Assets	'	'
Goodwill	359.7	338.9
Other intangible assets	222	224.7
Deferred income taxes	25.6	62.5
Other non-current assets	37.3	39.2
Total Other Assets	644.6	665.3
Total Assets	4,192.90	4,244.70
Current Liabilities	'	'
Short-term debt	21.1	14.3
Accounts payable, trade	252.5	216.2
Salaries, wages and benefits	184.1	213.9
Income taxes payable	109.4	33.5
Deferred income taxes	7.3	2.9
Other current liabilities	153.9	177.5
Current portion of long-term debt	250.1	9.6
Total Current Liabilities	978.4	667.9
Non-Current Liabilities	'	'
Long-term debt	205.4	455.1
Accrued pension cost	230.7	391.4
Accrued postretirement benefits cost	354.9	371.8
Deferred income taxes	10.8	4.9
Other non-current liabilities	45.6	107
Total Non-Current Liabilities	847.4	1,330.20
Shareholders' Equity	'	'
Class I and II Serial Preferred Stock, without par value: Authorized – 10,000,000 shares each class, none issued	0	0
Common stock, without par value: Authorized – 200,000,000 shares Issued (including shares in treasury) (2013 – 98,375,135 shares; 2012 – 98,375,135 shares)	53.1	53.1
Other paid-in capital	891.6	891.4
Earnings invested in the business	2,555.30	2,411.20
Accumulated other comprehensive loss	-953.6	-1,013.20
Treasury shares at cost (2013 -3,738,461 shares; 2012 - 2,476,921 shares)	-193.1	-110.3
Total Shareholders' Equity	2,353.30	2,232.20
Noncontrolling Interest	13.8	14.4
Total Equity	2,367.10	2,246.60
Total Liabilities and Shareholders' Equity	$4,192.90	$4,244.70

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Allowances for accounts receivable	$11.40	$12.10
Preferred stock, no par value (Class I & Class II Preferred stock)	$0	$0
Preferred stock, shares authorized (Class I & Class II Preferred stock)	10,000,000	10,000,000
Preferred stock, shares issued (Class I & Class II Preferred stock)	0	0
Common stock, no par value	$0	$0
Company common stock shares authorized	200,000,000	200,000,000
Common stock, shares issued	98,375,135	98,375,135
Treasury shares	3,738,461	2,476,921

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Operating Activities	'	'
Net income attributable to The Timken Company	$210.10	$420.20
Net income attributable to noncontrolling interest	0.2	0.3
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	144.7	148.8
Impairment charges	0	6.4
Loss on sale of assets	2.7	3.6
Deferred income tax provision	10.9	44.6
Stock-based compensation expense	12.2	13.4
Pension and other postretirement expense	64.8	70.1
Pension contributions and other postretirement benefit payments	-140.4	-399.8
Changes in operating assets and liabilities:	'	'
Accounts receivable	-40.3	13.8
Inventories	12.8	35.2
Accounts payable, trade	30.3	-17
Other accrued expenses	-64.8	-74.5
Income taxes	26.3	99.3
Other, net	-17.7	2.1
Net Cash Provided by Operating Activities	251.8	366.5
Investing Activities	'	'
Capital expenditures	-210.4	-187.3
Acquisitions, net of cash received	-64.5	-0.2
Proceeds from disposals of property, plant and equipment	1.2	1.8
Investments in short-term marketable securities, net	5.6	17.2
Other	1.5	3.5
Net Cash Used by Investing Activities	-266.6	-165
Financing Activities	'	'
Cash dividends paid to shareholders	-66	-66.8
Net proceeds from common share activity	21.4	20.2
Purchase of treasury shares	-107.4	-112.3
Payments on long-term debt	-9.8	-17.2
Short-term debt activity, net	7.6	-9.3
Decrease in restricted cash	0	3.6
Proceeds from sale of shares in subsidiary	8.9	0
Other	-0.5	0
Net Cash Used by Financing Activities	-145.8	-181.8
Effect of exchange rate changes on cash	-7.7	1
(Decrease) increase In Cash and Cash Equivalents	-168.3	20.7
Cash and cash equivalents at beginning of year	586.4	464.8
Cash and Cash Equivalents at End of Period	$418.10	$485.50

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	Note 1 - Basis of Presentation
	The accompanying Consolidated Financial Statements (unaudited) for The Timken Company (the Company) have been prepared in accordance with the instructions to Form 10-Q and do not include all of the information and notes required by the accounting principles generally accepted in the United States (U.S. GAAP) for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) and disclosures considered necessary for a fair presentation have been included. For further information, refer to the Consolidated Financial Statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012.
	On September 5, 2013, the Company announced that its Board of Directors had approved a plan to pursue a separation of its steel business from its bearings and power transmission business through a spinoff, creating a new independent, publicly traded steel company. The transaction is expected to be tax-free to shareholders and should be completed within 12 months, subject to customary regulatory approvals, the receipt of a legal opinion regarding the tax-free nature of the transaction, the execution of intercompany agreements between the Company and the new steel company, final approval of the Company's Board of Directors and other customary matters. One time transaction costs in connection with the separation of the two companies are expected to be approximately $125 million.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2013
Recent Accounting Pronouncements [Abstract]	'
Description of New Adopted Accounting Pronouncements	'
	Note 2 - Recent Accounting Pronouncements
	In February 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2013-02, Comprehensive Income (Topic 220): "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income," effective for annual and interim reporting periods beginning after December 15, 2012. The new accounting rules require all U.S. public companies to report the effect of items reclassified out of accumulated other comprehensive income on the respective line items of net income, net of tax, either on the face of the financial statements where net income is presented or in a tabular format in the notes to the financial statements. Effective January 1, 2013, the Company adopted ASU No. 2013-02. The new accounting rules expand the disclosure of other comprehensive income and had no impact on the Company's results of operations and financial condition. See Note 9 - Accumulated Other Comprehensive Income (Loss) for additional information on the new disclosure.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]	'
Acquisitions	'
	Note 3 - Acquisitions
	On March 11, 2013, the Company completed the acquisition of Interlube Systems Ltd. (Interlube), which makes and markets automated lubrication delivery systems and related components to end market sectors including commercial vehicles, construction, mining, and heavy and general industries, for approximately $14.8 million, including cash acquired of approximately $0.3 million, that was subject to a post-closing indebtedness adjustment. Based in Plymouth, United Kingdom, Interlube employs about 90 associates and had 2012 sales of approximately $13 million. The results of Interlube are reported in the Mobile Industries segment.
	On April 11, 2013, the Company completed the acquisition of substantially all of the assets of Smith Services, Inc. (Smith Services), an electric motor repair specialist, for approximately $13.2 million. Based in Princeton, West Virginia and employing approximately 140 people, Smith Services had 2012 sales of approximately $17 million. The results for Smith Services are reported in the Process Industries segment.
	On May 13, 2013, the Company completed the acquisition of Hamilton Gear Ltd., d/b/a Standard Machine (Standard Machine), which provides new gearboxes, gearbox service and repair, open gearing, large gear fabrication, machining and field technical services to end users in Canada and the western United States, for approximately $36.9 million in cash, including cash acquired of approximately $0.1 million that is subject to a post-closing indebtedness adjustment. Based in Saskatoon, Saskatchewan, Canada, Standard Machine employs 125 people and serves a wide variety of industrial sectors including mining, oil and gas, and pulp and paper. In 2012, Standard Machine reported sales of approximately $31 million.  The results for Standard Machine are reported in the Process Industries segment.
	Pro forma results of operations have not been presented because the effects of the acquisitions were not significant to the Company's income before income taxes or total assets in 2013. The following table presents the preliminary purchase price allocations, net of cash acquired, for acquisitions in 2013:
		Preliminary Purchase  Price
		Allocation
	Assets:
	Accounts receivable, net	$	10.7
	Inventories, net	13.7
	Deferred charges and prepaid expenses	0.3
	Other current assets	0.7
	Property, plant and equipment, net	20.4
	Goodwill	18.9
	Other intangible assets	11.2
	Total assets acquired	$	75.9
	Liabilities:
	Accounts payable, trade	$	4.1
	Salaries, wages and benefits	1.3
	Other current liabilities	1.2
	Other non-current liabilities	4.4
	Total liabilities assumed	$	11
	Net assets acquired	$	64.9
	The following table summarizes the preliminary purchase price allocation for identifiable intangible assets acquired in 2013:
		Initial Purchase
		Price Allocation
				Weighted -
				Average Life
	Trade name	$	0.9	8 years
	Know-how	5.7		15 years
	All customer relationships	4.3		20 years
	Non-compete agreements	0.3		4 years
	Total intangible assets allocated	$	11.2

Inventories

Inventories	9 Months Ended
	Sep. 30, 2013
Inventory Disclosure [Abstract]	'
Inventories	'
	Note 4 - Inventories
	The components of inventories were as follows:
		September 30,			December 31,
		2013			2012
	Manufacturing supplies	$	55.4		$	64.3
	Raw materials	105.1			110.7
	Work in process	324.8			278.1
	Finished products	399			430.4
	Subtotal	884.3			883.5
	Allowance for obsolete and surplus inventory	(28.2		)	(21.4		)
	Total Inventories, net	$	856.1		$	862.1
	Inventories are valued at the lower of cost or market, with approximately 55% valued by the last-in, first-out (LIFO) method and the remaining 45% valued by the first-in, first-out (FIFO) method. The majority of the Company's domestic inventories are valued by the LIFO method and all of the Company's international (outside the United States) inventories are valued by the FIFO method.
	An actual valuation of the inventory under the LIFO method can be made only at the end of each year based on the inventory levels and costs at that time. Accordingly, interim LIFO calculations must be based on management’s estimates of expected year-end inventory levels and costs. Because these calculations are subject to many factors beyond management’s control, annual results may differ from interim results as they are subject to the final year-end LIFO inventory valuation.
	The LIFO reserve at September 30, 2013 and December 31, 2012 was $288.9 million and $280.6 million, respectively. The Company recognized an increase in its LIFO reserve of $7.7 million and $8.3 million during the third quarter and first nine months of 2013, respectively, compared to an increase in its LIFO reserve of $3.7 million and $12.9 million during the third quarter and first nine months of 2012, respectively.
	Based on current expectations of inventory levels and costs, the Company expects to recognize an increase of approximately $10.3 million in its LIFO reserve for the year ended December 31, 2013. The expected increase in the LIFO reserve for 2013 reflects higher anticipated costs, especially scrap steel costs. A 1.0% increase in costs would increase the current LIFO expense estimate for 2013 by $5.9 million. A 1.0% increase in inventory quantities would have no effect on the current LIFO expense estimate for 2013.

Property_Plant_and_Equipment

Property, Plant and Equipment	9 Months Ended
	Sep. 30, 2013
Property, Plant and Equipment [Abstract]	'
Property, Plant and Equipment	'
	Note 5 - Property, Plant and Equipment
	The components of property, plant and equipment were as follows:
		September 30,			December 31,
		2013			2012
	Land and buildings	$	668.3		$	653.8
	Machinery and equipment	3,315.00			3,138.30
	Subtotal	3,983.30			3,792.10
	Accumulated depreciation	(2,485.0		)	(2,386.8		)
	Property, Plant and Equipment, net	$	1,498.30		$	1,405.30
	Depreciation expense for the nine months ended September 30, 2013 and 2012 was $131.0 million and $134.5 million, respectively. At September 30, 2013 and December 31, 2012, machinery and equipment included $82.5 million and $84.9 million, respectively, of capitalized software. Depreciation expense on capitalized software for the nine months ended September 30, 2013 and 2012 was approximately $18.8 million and $17.6 million, respectively. Interest capitalized during the nine months ended September 30, 2013 and 2012 was $8.6 million and $2.9 million, respectively.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Other Intangible Assets	'
	Note 6 - Goodwill and Other Intangible Assets
	The changes in the carrying amount of goodwill for the nine months ended September 30, 2013 were as follows:
		Mobile		Process		Aerospace		Steel		Total
		Industries		Industries
	Beginning balance	$	17.7	$	146.4	$	162.2	$	12.6	$	338.9
	Acquisitions	4.3		14.6		—		—		18.9
	Other	0.3		1.5		0.1		—		1.9
	Ending balance	$	22.3	$	162.5	$	162.3	$	12.6	$	359.7
	The change related to acquisitions primarily reflects the preliminary purchase price allocation for the acquisitions of Interlube completed on March 11, 2013, Smith Services completed on April 11, 2013 and Standard Machine completed on May 13, 2013. “Other” primarily includes foreign currency translation adjustments. The goodwill acquired from Smith Services of $0.9 million is tax-deductible and will be amortized over 15 years. See Note 3 - Acquisitions for additional information on the acquisitions listed above.
	The following table displays intangible assets as of September 30, 2013 and December 31, 2012:
		As of September 30, 2013						As of December 31, 2012
		Gross		Accumulated		Net		Gross		Accumulated		Net
		Carrying		Amortization		Carrying		Carrying		Amortization		Carrying
		Amount				Amount		Amount				Amount
	Intangible assets
	subject to amortization:
	Customer relationships	$	165.1	$	48.1	$	117	$	159.6	$	38.1	$	121.5
	Know-how	31.9		4		27.9		26.1		2.8		23.3
	Industrial license	0.2		0.1		0.1		0.2		0.1		0.1
	agreements
	Land-use rights	8.8		4.4		4.4		8.6		4.1		4.5
	Patents	2.3		1.8		0.5		2.5		1.8		0.7
	Technology use	46.3		12.9		33.4		47		11.5		35.5
	Trademarks	4.3		2.5		1.8		4.2		3.4		0.8
	PMA licenses	8.8		3.9		4.9		8.8		3.6		5.2
	Non-compete	4.2		3.7		0.5		4.4		3.3		1.1
	agreements
	Unpatented technology	7.2		7.2		—		7.2		6.7		0.5
		$	279.1	$	88.6	$	190.5	$	268.6	$	75.4	$	193.2
	Intangible assets not subject to amortization:
	Tradename	$	17.3	$	—	$	17.3	$	17.3	$	—	$	17.3
	FAA air agency	14.2		—		14.2		14.2		—		14.2
	certificates
		$	31.5	$	—	$	31.5	$	31.5	$	—	$	31.5
	Total intangible assets	$	310.6	$	88.6	$	222	$	300.1	$	75.4	$	224.7
	Amortization expense for intangible assets was $13.7 million and $14.3 million for the nine months ended September 30, 2013 and September 30, 2012, respectively. Amortization expense for intangible assets is estimated to be $18.9 million for 2013; $18.7 million in 2014; $18.6 million in 2015; $18.3 million in 2016; and $17.9 million in 2017.

Financing_Arrangements

Financing Arrangements	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Financing Arrangements	'
	Note 7 - Financing Arrangements
	Short-term debt at September 30, 2013 and December 31, 2012 was as follows:
		September 30,		December 31,
		2013		2012
	Variable-rate lines of credit for certain of the Company’s foreign subsidiaries with	$	21.1	$	14.3
	various banks with interest rates ranging from 0.82% to 4.86% at September 30,
	2013 and interest rates ranging from 0.61% to 2.28% at December 31, 2012.
	Short-term debt	$	21.1	$	14.3
	The lines of credit for certain of the Company’s foreign subsidiaries provide for short-term borrowings up to $226.6 million. Most of these lines of credit are uncommitted. At September 30, 2013, the Company’s foreign subsidiaries had borrowings outstanding of $21.1 million and guarantees of $0.7 million, which reduced the availability under these facilities to $204.8 million.
	The Company has a $200 million Amended and Restated Asset Securitization Agreement (Asset Securitization Agreement), which matures on November 30, 2015. Under the terms of the Asset Securitization Agreement, the Company sells, on an ongoing basis, certain domestic trade receivables to Timken Receivables Corporation, a wholly-owned consolidated subsidiary, that in turn uses the trade receivables to secure borrowings, which are funded through a vehicle that issues commercial paper in the short-term market. Borrowings under the agreement are limited by certain borrowing base calculations. Any amounts outstanding under this Asset Securitization Agreement would be reported in short-term debt on the Company’s Consolidated Balance Sheet. As of September 30, 2013, there were no outstanding borrowings under the Asset Securitization Agreement. However, certain borrowing base limitations reduced the availability of the Asset Securitization Agreement to $180.2 million at September 30, 2013. The cost of this facility, which is the commercial paper rate plus program fees, is considered a financing cost and is included in interest expense in the Consolidated Statements of Income.
	Long-term debt at September 30, 2013 and December 31, 2012 was as follows:
		September 30,		December 31,
		2013		2012
	Fixed-rate Medium-Term Notes, Series A, mature at various dates through	$	175	$	175
	May 2028, with interest rates ranging from 6.74% to 7.76%
	Fixed-rate Senior Unsecured Notes, maturing on September 15, 2014, with an	249.9		249.9
	interest rate of 6.0%
	Variable-rate State of Ohio Water Development Revenue Refunding Bonds,	12.2		12.2
	maturing on November 1, 2025 (0.07% at September 30, 2013)
	Variable-rate State of Ohio Air Quality Development Revenue Refunding Bonds,	9.5		9.5
	maturing on November 1, 2025 (0.15% at September 30, 2013)
	Variable-rate State of Ohio Pollution Control Revenue Refunding Bonds, maturing	8.5		8.5
	on June 1, 2033 (0.15% at September 30, 2013)
	Other	0.4		9.6
		$	455.5	$	464.7
	Less current maturities	250.1		9.6
	Long-term debt	$	205.4	$	455.1
	The Company has a $500 million Amended and Restated Credit Agreement (Senior Credit Facility), which matures on May 11, 2016. At September 30, 2013, the Company had no outstanding borrowings under the Senior Credit Facility but had letters of credit outstanding totaling $8.6 million, which reduced the availability under the Senior Credit Facility to $491.4 million. Under the Senior Credit Facility, the Company has two financial covenants: a consolidated leverage ratio and a consolidated interest coverage ratio. At September 30, 2013, the Company was in full compliance with both the covenants under the Senior Credit Facility.
	In 2011, the Company was notified that its variable-rate State of Ohio Pollution Control Revenue Refunding Bonds (the Bonds), maturing on June 1, 2033, had lost their tax-exempt status and would now be taxable to its bondholders. As part of the settlement with the Internal Revenue Service (IRS), the Company redeemed half of the balance during the third quarter of 2012 and agreed to redeem the remaining balance of $8.5 million on December 31, 2022. In addition, the IRS agreed to allow the Bonds to remain tax-exempt during the period they are outstanding.

Equity

Equity	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Equity	'
	Note 8 - Equity
	The changes in the equity components for the nine months ended September 30, 2013 were as follows:
					The Timken Company Shareholders
		Total			Stated		Other			Earnings			Accumulated			Treasury			Non-
					Capital		Paid-In			Invested			Other			Stock			controlling
							Capital			in the			Comprehensive						Interest
										Business			(Loss)
	Balance at December 31, 2012	$	2,246.60		$	53.1	$	891.4		$	2,411.20		$	(1,013.2	)	$	(110.3	)	$	14.4
	Net income	210.3								210.1									0.2
	Foreign currency translation	(19.3		)									(11.5		)				(7.8		)
	adjustment
	Pension and postretirement liability	71.1											71.1						—
	adjustment (net of the income tax
	benefit of $32.7 million)
	Change in ownership of non-controlling interest	8.9					1.3												7.6
	Dividends declared to noncontrolling interest	(0.6		)															(0.6		)
	Dividends – $0.69 per share	(66.0		)						(66.0		)
	Excess tax benefit from stock	10.4					10.4
	compensation
	Stock-based compensation expense	12.8					12.8
	Stock purchased at cost	(107.4		)												(107.4		)
	Stock option exercise activity	7.6					(20.6		)							28.2
	Restricted shares surrendered (issued)	1.1					(3.7		)							4.8
	Shares surrendered for taxes	(8.4		)												(8.4		)
	Balance at September 30, 2013	$	2,367.10		$	53.1	$	891.6		$	2,555.30		$	(953.6	)	$	(193.1	)	$	13.8
	In April 2013, the Company's subsidiary in India, Timken India Limited, issued new shares for approximately $8.9 million, net of transactions costs, which diluted the Company's controlling interest from 80% to 75%.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2013
Statement of Financial Position [Abstract]	'
accumulated other comprehensive income components reclassification	'
	Note 9 - Accumulated Other Comprehensive Income (Loss)
	The following table presents details about components of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2013, respectively:
		Foreign currency translation adjustments			Pension and postretirement liability adjustments			Change in fair value of derivative financial instruments			Total
	Balance, June 30, 2013	$	18.8		$	(1,004.7	)	$	0.5		$	(985.4	)
	Other comprehensive (loss) income before	15.2			(7.3		)	(1.7		)	6.2
	reclassifications, before income tax
	Amounts reclassified from accumulated other	—			32.3			(0.2		)	32.1
	comprehensive income, before income tax
	Income tax (benefit) expense	—			(10.7		)	0.7			(10.0		)
	Net current period other comprehensive (loss) income,	15.2			14.3			(1.2		)	28.3
	net of income taxes
	Non-controlling interest	3.5			—			—			3.5
	Net current period comprehensive (loss) income, net of	18.7			14.3			(1.2		)	31.8
	income taxes and non-controlling interest
	Balance, September 30, 2013	$	37.5		$	(990.4	)	$	(0.7	)	$	(953.6	)
		Foreign currency			Pension and postretirement			Change in fair value of			Total
		translation adjustments			liability adjustments			derivative financial instruments
	Balance, December 31, 2012	$	49		$	(1,061.5	)	$	(0.7	)	$	(1,013.2	)
	Other comprehensive (loss) income before	(19.3		)	4.6			0.2			(14.5		)
	reclassifications, before income tax
	Amounts reclassified from accumulated other	—			99.2			(0.4		)	98.8
	comprehensive income, before income tax
	Income tax (benefit) expense	—			(32.7		)	0.2			(32.5		)
	Net current period other comprehensive (loss) income,	(19.3		)	71.1			—			51.8
	net of income taxes
	Non-controlling interest	7.8			—			—			7.8
	Net current period comprehensive (loss) income, net of	(11.5		)	71.1			—			59.6
	income taxes and non-controlling interest
	Balance, September 30, 2013	$	37.5		$	(990.4	)	$	(0.7	)	$	(953.6	)
	The following table presents details about components of accumulated other comprehensive loss for the three and nine months ended September 30, 2012, respectively:
		Foreign currency translation adjustments			Pension and postretirement liability adjustments			Change in fair value of marketable securities			Change in fair value of derivative financial instruments			Total
	Balance, June 30, 2012	$	22.5		$	(906.3	)	$	0.2		$	1.1		$	(882.5	)
	Other comprehensive (loss) income before	16.5			(3.3		)	—			(0.9		)	12.3
	reclassifications, before income tax
	Amounts reclassified from accumulated	—			23.6			(0.2		)	(0.6		)	22.8
	other comprehensive income, before
	income tax
	Income tax (benefit) expense	—			(8.1		)	—			0.6			(7.5		)
	Net current period comprehensive (loss)	16.5			12.2			(0.2		)	(0.9		)	27.6
	income, net of income taxes and
	non-controlling interest
	Balance, September 30, 2012	$	39		$	(894.1	)	$	—		$	0.2		$	(854.9	)
		Foreign currency			Pension and postretirement			Change in fair value of			Change in fair value of			Total
		translation adjustments			liability adjustments			marketable securities			derivative financial instruments
	Balance, December 31, 2011	$	38.5		$	(928.3	)	$	0.6		$	(0.3	)	$	(889.5	)
	Other comprehensive (loss) income before	0.5			(13.5		)	—			1.2			(11.8		)
	reclassifications, before income tax
	Amounts reclassified from accumulated	—			72.2			(1.1		)	(0.4		)	70.7
	other comprehensive income, before
	income tax
	Income tax (benefit) expense	—			(24.5		)	0.4			(0.3		)	(24.4		)
	Net current period other comprehensive	0.5			34.2			(0.7		)	0.5			34.5
	(loss) income, net of income taxes
	Non-controlling interest	—			—			0.1			—			0.1
	Net current period comprehensive (loss)	0.5			34.2			(0.6		)	0.5			34.6
	income, net of income taxes and
	non-controlling interest
	Balance, September 30, 2012	$	39		$	(894.1	)	$	—		$	0.2		$	(854.9	)
	Other comprehensive (loss) income before reclassifications and income taxes includes the effect of foreign currency. The reclassification of the pension and postretirement liability adjustment was included in costs of products sold and selling, general and administrative expenses on the Consolidated Statements of Income. The reclassification of the remaining components of accumulated other comprehensive (loss) income were included in other income (expense), net on the Consolidated Statements of Income.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Note 10 - Earnings Per Share
	The following table sets forth the reconciliation of the numerator and the denominator of basic earnings per share and diluted earnings per share for the three months and nine months ended September 30, 2013 and 2012:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Numerator:
	Net income attributable to The Timken Company	$	52.2	$	80.9	$	210.1	$	420.2
	Less: undistributed earnings allocated to nonvested stock	0.1		0.2		0.2		1.3
	Net income available to common shareholders for basic	$	52.1	$	80.7	$	209.9	$	418.9
	earnings per share and diluted earnings per share
	Denominator:
	Weighted average number of shares outstanding, basic	94,667,659		96,356,772		95,391,695		96,981,922
	Effect of dilutive securities:
	Stock options and awards based on the treasury	740,410		766,401		856,516		933,878
	stock method
	Weighted average number of shares outstanding,	95,408,069		97,123,173		96,248,211		97,915,800
	assuming dilution of stock options and awards
	Basic earnings per share	$	0.55	$	0.84	$	2.2	$	4.32
	Diluted earnings per share	$	0.54	$	0.83	$	2.18	$	4.28
	The exercise prices for certain stock options that the Company has awarded exceed the average market price of the Company’s common shares. Such stock options are antidilutive and were not included in the computation of diluted earnings per share. The antidilutive stock options outstanding during the three months ended September 30, 2013 and 2012 were zero and 1,299,460, respectively. The antidilutive stock options outstanding during the nine months ended September 30, 2013 and 2012 were 306,767 and 739,577, respectively.

Segment_Information

Segment Information	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Segment Information	'
	Note 11 - Segment Information
	The primary measurement used by management to measure the financial performance of each segment is EBIT (earnings before interest and taxes).
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Net sales to external customers:
	Mobile Industries	$	348		$	396.7		$	1,137.50		$	1,314.00
	Process Industries	307.2			309.8			907.8			1,000.50
	Aerospace	76.3			84			240.8			262.5
	Steel	330			352			991.8			1,329.70
		$	1,061.50		$	1,142.50		$	3,277.90		$	3,906.70
	Intersegment sales:
	Mobile Industries	$	0.1		$	0.2		$	0.8		$	0.4
	Process Industries	1.1			1.3			3.1			3.9
	Steel	20.5			25			58.9			82.6
		$	21.7		$	26.5		$	62.8		$	86.9
	Segment EBIT:
	Mobile Industries	$	29.1		$	37.9		$	132.7		$	173.4
	Process Industries	50.8			60.1			148			213.7
	Aerospace	4.9			7.7			21.4			26.3
	Steel	29.2			49.7			107.3			226.6
	Total EBIT for reportable segments	$	114		$	155.4		$	409.4		$	640
	Unallocated corporate expenses	(24.3		)	(20.1		)	(67.0		)	(63.8		)
	CDSOA receipts, net of expense	—			(0.9		)	—			108.6
	Interest expense	(4.9		)	(7.3		)	(17.5		)	(24.0		)
	Interest income	0.5			0.6			1.5			2
	Intersegment adjustments	(0.4		)	0.4			1.2			(1.3		)
	Income before income taxes	$	84.9		$	128.1		$	327.6		$	661.5

Impairment_and_Restructuring_C

Impairment and Restructuring Charges	9 Months Ended
	Sep. 30, 2013
Restructuring and Related Activities [Abstract]	'
Impairment and Restructuring Charges	'
	Note 12 - Impairment and Restructuring Charges
	Impairment and restructuring charges by segment are comprised of the following:
	For the three months ended September 30, 2013:
		Mobile Industries			Process Industries			Total
	Severance and related benefit costs	$	3.1		$	0.1		$	3.2
	Exit costs	0.2			0.3			0.5
	Total	$	3.3		$	0.4		$	3.7
	For the three months ended September 30, 2012:
		Mobile Industries			Process Industries			Total
	Impairment charges	$	6.4		$	—		$	6.4
	Severance and related benefit costs	0.3			1			1.3
	Exit costs	4.2			—			4.2
	Total	$	10.9		$	1		$	11.9
	For the nine months ended September 30, 2013:
		Mobile Industries			Process Industries			Total
	Severance and related benefit costs	$	9.9		$	0.3		$	10.2
	Exit costs	1.1			0.3			1.4
	Total	$	11		$	0.6		$	11.6
	For the nine months ended September 30, 2012:
		Mobile Industries			Process Industries			Total
	Impairment charges	$	6.4		$	—		$	6.4
	Severance expense and related benefit costs	16.6			1.3			17.9
	Exit costs	4.5			—			4.5
	Total	$	27.5		$	1.3		$	28.8
	The following discussion explains the impairment and restructuring charges recorded for the periods presented; however, it is not intended to reflect a comprehensive discussion of all amounts in the tables above.
	Mobile Industries
	In May 2012, the Company announced the closure of its manufacturing facility in St. Thomas, Ontario, Canada (St. Thomas), which was expected to be completed in approximately one year, and was intended to consolidate bearing production at this plant with its existing U.S. operations to better align the Company's manufacturing footprint and customer base. The Company also moved customer service for the Canadian market to its offices in Toronto. The Company completed the closure of this manufacturing facility on March 31, 2013. The closure of the St. Thomas manufacturing facility displaced 190 employees. The Company expects to incur pretax costs of approximately $55 million to $65 million in connection with this closure, of which approximately $20 million to $25 million is expected to be pretax cash costs.
	The Company has incurred pretax costs related to this closure of approximately $40.9 million as of September 30, 2013, including rationalization costs recorded in cost of products sold. During the third quarter of 2013, the Company recorded $1.5 million of severance and related benefits related to pension settlement charges of $1.5 million. During the first nine months of 2013, the Company recorded $7.8 million of severance and related benefits, including pension settlement charges of $6.7 million, related to this closure. During the third quarter of 2012, the Company recorded $6.4 million of impairment charges. During the first nine months of 2012, the Company recorded $16.8 million of severance and related benefits, including a curtailment of pension benefits of $10.7 million and impairment charges of $6.4 million. The majority of the $16.8 million charge was incurred by the Mobile Industries segment.
	In March 2007, the Company announced the closure of its manufacturing facility in Sao Paulo, Brazil (Sao Paulo). The Company completed the closure of this manufacturing facility on March 31, 2010. Pretax costs associated with the closure could be as high as approximately $60 million, which includes restructuring costs and rationalization costs recorded in cost of products sold and selling, general and administrative expenses. Mobile Industries has incurred cumulative pretax costs of approximately $58.7 million as of September 30, 2013 related to this closure. During the third quarter and first nine months of 2012, the Company recorded $4.2 million and $7.1 million of exit costs associated with the closure of this facility, primarily related to environmental remediation costs. The Company accrues environmental remediation costs when they are probable and estimable.
	The following is a rollforward of the consolidated restructuring accrual for the nine months ended September 30, 2013 and the twelve months ended December 31, 2012:
		September 30,			December 31,
		2013			2012
	Beginning balance, January 1	$	17.6		$	21.8
	Expense	4.9			12.2
	Payments	(12.6		)	(16.4		)
	Ending balance	$	9.9		$	17.6
	The restructuring accrual at September 30, 2013 and December 31, 2012 was included in other current liabilities on the Consolidated Balance Sheets. The restructuring accrual at September 30, 2013 excluded costs related to the settlement of pension benefit plans of $6.7 million. The restructuring accrual at September 30, 2013 included $4.0 million of environmental remediation costs, of which $3.2 million relates to Sao Paulo. The Company adjusts environmental remediation accruals based on the best available estimate of costs to be incurred, the timing and extent of remedial actions required by governmental authorities and the amount of the Company's liability in proportion to other responsible parties. The Company's estimated total liability for this site ranges from a minimum of $3.2 million to a maximum of $7.2 million. It is possible that the estimates may change in the near term.

Retirement_and_Postretirement_

Retirement and Postretirement Benefit Plans	9 Months Ended
	Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]	'
Retirement and Postretirement Benefit Plans	'
	Note 13 - Retirement and Postretirement Benefit Plans
	The following table sets forth the net periodic benefit cost for the Company’s defined benefit pension and postretirement benefit plans. The amounts for the three months and nine months ended September 30, 2013 are based on updated actuarial calculations prepared during the second quarter of 2013. The net periodic benefit cost recorded for the three months and nine months ended September 30, 2013 is the Company’s best estimate of each period’s proportionate share of the amounts to be recorded for the year ending December 31, 2013.
		Pension						Postretirement
		Three Months Ended						Three Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Components of net periodic benefit cost:
	Service cost	$	9.6		$	8.7		$	0.7		$	0.6
	Interest cost	33.6			37.7			5.1			7
	Expected return on plan assets	(57.8		)	(55.3		)	(2.5		)	(2.7		)
	Amortization of prior service cost (credit)	1.1			2.3			(0.1		)	—
	Amortization of net actuarial loss	29.2			20.8			0.6			0.6
	Pension curtailments and settlements	1.5			—			—			—
	Net periodic benefit cost	$	17.2		$	14.2		$	3.8		$	5.5
		Pension						Postretirement
		Nine Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Components of net periodic benefit cost:
	Service cost	$	28.9		$	25.9		$	2.2		$	1.9
	Interest cost	100.9			113.3			15.9			20.9
	Expected return on plan assets	(174.0		)	(165.8		)	(8.3		)	(8.0		)
	Amortization of prior service cost (credit)	3.4			7			(0.2		)	(0.2		)
	Amortization of net actuarial loss	87.5			62.5			1.8			1.9
	Pension curtailments and settlements	6.7			10.7			—			—
	Net periodic benefit cost	$	53.4		$	53.6		$	11.4		$	16.5

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Note 14 - Income Taxes
	The Company's provision for income taxes in interim periods is computed by applying the appropriate estimated annual effective tax rates to income or loss before income taxes for the period. In addition, non-recurring or discrete items, including interest on prior year tax liabilities, are recorded during the period(s) in which they occur.
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Provision for income taxes	$	32.4		$	47		$	117.3		$	241
	Effective tax rate	38.2		%	36.7		%	35.8		%	36.4		%
	The effective tax rate in the third quarter of 2013 was higher than the U.S. federal statutory rate of 35% primarily due to losses at certain foreign subsidiaries where no tax benefit could be recorded, U.S. taxation of foreign earnings, certain non-deductible U.S. expenses primarily due to the Company's separation costs and U.S. state and local taxes. These factors were partially offset by earnings in certain foreign jurisdictions where the effective tax rate is less than 35%, the U.S. manufacturing deduction, the U.S. research tax credit and certain discrete tax benefits.
	The effective tax rate in the first nine months of 2013 was lower than the U.S. federal statutory rate of 35% primarily due to earnings in certain foreign jurisdictions where the effective tax rate is less than 35%, the U.S. manufacturing deduction, the U.S. research tax credit and certain discrete tax benefits. These factors were partially offset by losses at certain foreign subsidiaries where no tax benefit could be recorded, U.S. taxation of foreign earnings, U.S. state and local taxes and certain non-deductible U.S. expenses primarily due to the Company's separation costs.

Fair_Value

Fair Value	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value	'
	Note 15 - Fair Value
	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). The FASB provides accounting rules that classify the inputs used to measure fair value into the following hierarchy:
	Level 1 – Unadjusted quoted prices in active markets for identical assets or liabilities.
	Level 2 – Unadjusted quoted prices in active markets for similar assets or liabilities, or unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active, or inputs other than quoted prices that are observable for the asset or liability.
	Level 3 – Unobservable inputs for the asset or liability.
	The following table presents the fair value hierarchy for those financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2013 and December 31, 2012:
		30-Sep-13
		Total		Level 1		Level 2		Level 3
	Assets:
	Cash and cash equivalents	$	418.1	$	322	$	96.1	$	—
	Short-term investments	28.3		—		28.3		—
	Foreign currency hedges	0.9		—		0.9		—
	Total Assets	$	447.3	$	322	$	125.3	$	—
	Liabilities:
	Foreign currency hedges	$	3.8	$	—	$	3.8	$	—
	Total Liabilities	$	3.8	$	—	$	3.8	$	—
		December 31, 2012
		Total		Level 1		Level 2		Level 3
	Assets:
	Cash and cash equivalents	$	586.4	$	303.9	$	282.5	$	—
	Short-term investments	31.3		—		31.3		—
	Foreign currency hedges	1.2		—		1.2		—
	Total Assets	$	618.9	$	303.9	$	315	$	—
	Liabilities:
	Foreign currency hedges	$	1.9	$	—	$	1.9	$	—
	Total Liabilities	$	1.9	$	—	$	1.9	$	—
	Cash and cash equivalents are highly liquid investments with maturities of three months or less when purchased and are valued at the redemption value. Cash and cash equivalents classified as level 2 assets in the fair value hierarchy are valued based on either amortized cost or net asset value per share. Short-term investments are investments with maturities between four months and one year and are valued at the amortized cost. The Company uses publicly available foreign currency forward and spot rates to measure the fair value of its foreign currency forward contracts.
	At December 31, 2012, the Company classified cash and cash equivalents of $586.4 million as Level 1 assets. The Company has reviewed this classification and has reclassified $303.9 million of cash and cash equivalents as Level 1 assets and $282.5 million of cash and cash equivalents as Level 2 assets. In addition, the Company reclassified short-term investments classified as Level 1 assets as of December 31, 2012 to Level 2 assets.
	The Company does not believe it has significant concentrations of risk associated with the counterparts to its financial instruments.
	Financial Instruments
	The Company’s financial instruments consist primarily of cash and cash equivalents, short-term investments, accounts receivable, net, accounts payable, trade, short-term borrowings and long-term debt. Due to their short-term nature, the carrying value of cash and cash equivalents, short-term investments, accounts receivable, net, accounts payable, trade and short-term borrowings are a reasonable estimate of their fair value. The fair value of the Company’s long-term fixed-rate debt, based on quoted market prices, was $456.8 million and $481.3 million at September 30, 2013 and December 31, 2012, respectively. The carrying value of this debt was $424.9 million at September 30, 2013 and December 31, 2012. The fair value of long-term fixed debt was measured using Level 2 inputs.

Continued_Dumping_and_Subsidy_

Continued Dumping and Subsidy Act	9 Months Ended
	Sep. 30, 2013
CDSOA [Abstract]	'
Continued Dumping And Subsidy Offset Act	'
	Note 16 - Continued Dumping and Subsidy Offset Act (CDSOA)
	CDSOA provides for distribution of monies collected by U.S. Customs and Border Protection (U.S. Customs) from antidumping cases to qualifying domestic producers where the domestic producers have continued to invest in their technology, equipment and people.
	In September 2002, the World Trade Organization (WTO) ruled that CDSOA payments are not consistent with international trade rules. In February 2006, U.S. legislation was enacted that ended CDSOA distributions for dumped imports covered by antidumping duty orders entering the United States after September 30, 2007. Instead, any such antidumping duties collected would remain with the U.S. Treasury. Several countries have objected that this U.S. legislation is not consistent with WTO rulings, and were granted retaliation rights by the WTO, typically in the form of increased tariffs on some imported goods from the United States. The European Union and Japan have been retaliating in this fashion against the operation of U.S. law.
	In 2006, the U.S. Court of International Trade (CIT) ruled, in two separate decisions, that the procedure for determining recipients eligible to receive CDSOA distributions was unconstitutional. In addition, several other court cases challenging various provisions of CDSOA were ongoing. As a result, from 2006 through 2010, U.S. Customs withheld a portion of the amounts that would otherwise have been distributed under CDSOA.
	In February 2009, the U.S. Court of Appeals for the Federal Circuit reversed both of the 2006 decisions of the CIT. Later in December 2009, a plaintiff petitioned the U.S. Supreme Court to hear a further appeal, but the Supreme Court declined the petition, allowing the appellate court reversals to stand. At that time, several court cases challenging various provisions of the CDSOA were still unresolved, so U.S. Customs accepted the CIT’s recommendation to continue to withhold CDSOA receipts related to 2006 through 2010 until January 2012.
	U.S. Customs began distributing the withheld funds to affected domestic producers in early April 2012. In April 2012, the Company received CDSOA distributions of $112.8 million in the aggregate for amounts originally withheld from 2006 through 2010.
	While some of the challenges to CDSOA have been resolved, others are still in litigation. Since there continue to be legal challenges to CDSOA, U.S. Customs has advised all affected domestic producers that it is possible that CDSOA distributions could be subject to clawback. Management of the Company believes that the likelihood of clawback is remote.

Recent_Accounting_Pronouncemen1

Recent Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Changes and Error Corrections [Abstract]	'
New Accounting Pronouncements and Changes in Accounting Principles AOCI reclassifications	'
	In February 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2013-02, Comprehensive Income (Topic 220): "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income," effective for annual and interim reporting periods beginning after December 15, 2012. The new accounting rules require all U.S. public companies to report the effect of items reclassified out of accumulated other comprehensive income on the respective line items of net income, net of tax, either on the face of the financial statements where net income is presented or in a tabular format in the notes to the financial statements. Effective January 1, 2013, the Company adopted ASU No. 2013-02. The new accounting rules expand the disclosure of other comprehensive income and had no impact on the Company's results of operations and financial condition. See Note 9 - Accumulated Other Comprehensive Income (Loss) for additional information on the new disclosure.
Comprehensive Income	'
	Note 2 - Recent Accounting Pronouncements
	In February 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2013-02, Comprehensive Income (Topic 220): "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income," effective for annual and interim reporting periods beginning after December 15, 2012. The new accounting rules require all U.S. public companies to report the effect of items reclassified out of accumulated other comprehensive income on the respective line items of net income, net of tax, either on the face of the financial statements where net income is presented or in a tabular format in the notes to the financial statements. Effective January 1, 2013, the Company adopted ASU No. 2013-02. The new accounting rules expand the disclosure of other comprehensive income and had no impact on the Company's results of operations and financial condition. See Note 9 - Accumulated Other Comprehensive Income (Loss) for additional information on the new disclosure.

Acquisitions_Tables

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]	'
Fair values of the assets acquired and liabilities assumed	'
	The following table presents the preliminary purchase price allocations, net of cash acquired, for acquisitions in 2013:
		Preliminary Purchase  Price
		Allocation
	Assets:
	Accounts receivable, net	$	10.7
	Inventories, net	13.7
	Deferred charges and prepaid expenses	0.3
	Other current assets	0.7
	Property, plant and equipment, net	20.4
	Goodwill	18.9
	Other intangible assets	11.2
	Total assets acquired	$	75.9
	Liabilities:
	Accounts payable, trade	$	4.1
	Salaries, wages and benefits	1.3
	Other current liabilities	1.2
	Other non-current liabilities	4.4
	Total liabilities assumed	$	11
	Net assets acquired	$	64.9
Business Acquisition Purchase price allocation identifiable intangible assets	'
	The following table summarizes the preliminary purchase price allocation for identifiable intangible assets acquired in 2013:
		Initial Purchase
		Price Allocation
				Weighted -
				Average Life
	Trade name	$	0.9	8 years
	Know-how	5.7		15 years
	All customer relationships	4.3		20 years
	Non-compete agreements	0.3		4 years
	Total intangible assets allocated	$	11.2

Inventories_Tables

Inventories (Tables)	9 Months Ended
	Sep. 30, 2013
Inventory Disclosure [Abstract]	'
Components of inventories	'
	The components of inventories were as follows:
		September 30,			December 31,
		2013			2012
	Manufacturing supplies	$	55.4		$	64.3
	Raw materials	105.1			110.7
	Work in process	324.8			278.1
	Finished products	399			430.4
	Subtotal	884.3			883.5
	Allowance for obsolete and surplus inventory	(28.2		)	(21.4		)
	Total Inventories, net	$	856.1		$	862.1

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	9 Months Ended
	Sep. 30, 2013
Property, Plant and Equipment [Abstract]	'
Components of property, plant and equipment	'
	The components of property, plant and equipment were as follows:
		September 30,			December 31,
		2013			2012
	Land and buildings	$	668.3		$	653.8
	Machinery and equipment	3,315.00			3,138.30
	Subtotal	3,983.30			3,792.10
	Accumulated depreciation	(2,485.0		)	(2,386.8		)
	Property, Plant and Equipment, net	$	1,498.30		$	1,405.30

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Change in the carrying amount of goodwill	'
	The changes in the carrying amount of goodwill for the nine months ended September 30, 2013 were as follows:
		Mobile		Process		Aerospace		Steel		Total
		Industries		Industries
	Beginning balance	$	17.7	$	146.4	$	162.2	$	12.6	$	338.9
	Acquisitions	4.3		14.6		—		—		18.9
	Other	0.3		1.5		0.1		—		1.9
	Ending balance	$	22.3	$	162.5	$	162.3	$	12.6	$	359.7
Intangible assets	'
	The following table displays intangible assets as of September 30, 2013 and December 31, 2012:
		As of September 30, 2013						As of December 31, 2012
		Gross		Accumulated		Net		Gross		Accumulated		Net
		Carrying		Amortization		Carrying		Carrying		Amortization		Carrying
		Amount				Amount		Amount				Amount
	Intangible assets
	subject to amortization:
	Customer relationships	$	165.1	$	48.1	$	117	$	159.6	$	38.1	$	121.5
	Know-how	31.9		4		27.9		26.1		2.8		23.3
	Industrial license	0.2		0.1		0.1		0.2		0.1		0.1
	agreements
	Land-use rights	8.8		4.4		4.4		8.6		4.1		4.5
	Patents	2.3		1.8		0.5		2.5		1.8		0.7
	Technology use	46.3		12.9		33.4		47		11.5		35.5
	Trademarks	4.3		2.5		1.8		4.2		3.4		0.8
	PMA licenses	8.8		3.9		4.9		8.8		3.6		5.2
	Non-compete	4.2		3.7		0.5		4.4		3.3		1.1
	agreements
	Unpatented technology	7.2		7.2		—		7.2		6.7		0.5
		$	279.1	$	88.6	$	190.5	$	268.6	$	75.4	$	193.2
	Intangible assets not subject to amortization:
	Tradename	$	17.3	$	—	$	17.3	$	17.3	$	—	$	17.3
	FAA air agency	14.2		—		14.2		14.2		—		14.2
	certificates
		$	31.5	$	—	$	31.5	$	31.5	$	—	$	31.5
	Total intangible assets	$	310.6	$	88.6	$	222	$	300.1	$	75.4	$	224.7

Financing_Arrangements_Tables

Financing Arrangements (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Short-term debt	'
	Short-term debt at September 30, 2013 and December 31, 2012 was as follows:
		September 30,		December 31,
		2013		2012
	Variable-rate lines of credit for certain of the Company’s foreign subsidiaries with	$	21.1	$	14.3
	various banks with interest rates ranging from 0.82% to 4.86% at September 30,
	2013 and interest rates ranging from 0.61% to 2.28% at December 31, 2012.
	Short-term debt	$	21.1	$	14.3
Long-term debt	'
	Long-term debt at September 30, 2013 and December 31, 2012 was as follows:
		September 30,		December 31,
		2013		2012
	Fixed-rate Medium-Term Notes, Series A, mature at various dates through	$	175	$	175
	May 2028, with interest rates ranging from 6.74% to 7.76%
	Fixed-rate Senior Unsecured Notes, maturing on September 15, 2014, with an	249.9		249.9
	interest rate of 6.0%
	Variable-rate State of Ohio Water Development Revenue Refunding Bonds,	12.2		12.2
	maturing on November 1, 2025 (0.07% at September 30, 2013)
	Variable-rate State of Ohio Air Quality Development Revenue Refunding Bonds,	9.5		9.5
	maturing on November 1, 2025 (0.15% at September 30, 2013)
	Variable-rate State of Ohio Pollution Control Revenue Refunding Bonds, maturing	8.5		8.5
	on June 1, 2033 (0.15% at September 30, 2013)
	Other	0.4		9.6
		$	455.5	$	464.7
	Less current maturities	250.1		9.6
	Long-term debt	$	205.4	$	455.1

Equity_Tables

Equity (Tables)	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Equity	'
	The changes in the equity components for the nine months ended September 30, 2013 were as follows:
					The Timken Company Shareholders
		Total			Stated		Other			Earnings			Accumulated			Treasury			Non-
					Capital		Paid-In			Invested			Other			Stock			controlling
							Capital			in the			Comprehensive						Interest
										Business			(Loss)
	Balance at December 31, 2012	$	2,246.60		$	53.1	$	891.4		$	2,411.20		$	(1,013.2	)	$	(110.3	)	$	14.4
	Net income	210.3								210.1									0.2
	Foreign currency translation	(19.3		)									(11.5		)				(7.8		)
	adjustment
	Pension and postretirement liability	71.1											71.1						—
	adjustment (net of the income tax
	benefit of $32.7 million)
	Change in ownership of non-controlling interest	8.9					1.3												7.6
	Dividends declared to noncontrolling interest	(0.6		)															(0.6		)
	Dividends – $0.69 per share	(66.0		)						(66.0		)
	Excess tax benefit from stock	10.4					10.4
	compensation
	Stock-based compensation expense	12.8					12.8
	Stock purchased at cost	(107.4		)												(107.4		)
	Stock option exercise activity	7.6					(20.6		)							28.2
	Restricted shares surrendered (issued)	1.1					(3.7		)							4.8
	Shares surrendered for taxes	(8.4		)												(8.4		)
	Balance at September 30, 2013	$	2,367.10		$	53.1	$	891.6		$	2,555.30		$	(953.6	)	$	(193.1	)	$	13.8

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2013
Accumulated Comprehensive Income Components reclassification	'
	The following table presents details about components of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2013, respectively:
		Foreign currency translation adjustments			Pension and postretirement liability adjustments			Change in fair value of derivative financial instruments			Total
	Balance, June 30, 2013	$	18.8		$	(1,004.7	)	$	0.5		$	(985.4	)
	Other comprehensive (loss) income before	15.2			(7.3		)	(1.7		)	6.2
	reclassifications, before income tax
	Amounts reclassified from accumulated other	—			32.3			(0.2		)	32.1
	comprehensive income, before income tax
	Income tax (benefit) expense	—			(10.7		)	0.7			(10.0		)
	Net current period other comprehensive (loss) income,	15.2			14.3			(1.2		)	28.3
	net of income taxes
	Non-controlling interest	3.5			—			—			3.5
	Net current period comprehensive (loss) income, net of	18.7			14.3			(1.2		)	31.8
	income taxes and non-controlling interest
	Balance, September 30, 2013	$	37.5		$	(990.4	)	$	(0.7	)	$	(953.6	)
		Foreign currency			Pension and postretirement			Change in fair value of			Total
		translation adjustments			liability adjustments			derivative financial instruments
	Balance, December 31, 2012	$	49		$	(1,061.5	)	$	(0.7	)	$	(1,013.2	)
	Other comprehensive (loss) income before	(19.3		)	4.6			0.2			(14.5		)
	reclassifications, before income tax
	Amounts reclassified from accumulated other	—			99.2			(0.4		)	98.8
	comprehensive income, before income tax
	Income tax (benefit) expense	—			(32.7		)	0.2			(32.5		)
	Net current period other comprehensive (loss) income,	(19.3		)	71.1			—			51.8
	net of income taxes
	Non-controlling interest	7.8			—			—			7.8
	Net current period comprehensive (loss) income, net of	(11.5		)	71.1			—			59.6
	income taxes and non-controlling interest
	Balance, September 30, 2013	$	37.5		$	(990.4	)	$	(0.7	)	$	(953.6	)
	The following table presents details about components of accumulated other comprehensive loss for the three and nine months ended September 30, 2012, respectively:
		Foreign currency translation adjustments			Pension and postretirement liability adjustments			Change in fair value of marketable securities			Change in fair value of derivative financial instruments			Total
	Balance, June 30, 2012	$	22.5		$	(906.3	)	$	0.2		$	1.1		$	(882.5	)
	Other comprehensive (loss) income before	16.5			(3.3		)	—			(0.9		)	12.3
	reclassifications, before income tax
	Amounts reclassified from accumulated	—			23.6			(0.2		)	(0.6		)	22.8
	other comprehensive income, before
	income tax
	Income tax (benefit) expense	—			(8.1		)	—			0.6			(7.5		)
	Net current period comprehensive (loss)	16.5			12.2			(0.2		)	(0.9		)	27.6
	income, net of income taxes and
	non-controlling interest
	Balance, September 30, 2012	$	39		$	(894.1	)	$	—		$	0.2		$	(854.9	)
		Foreign currency			Pension and postretirement			Change in fair value of			Change in fair value of			Total
		translation adjustments			liability adjustments			marketable securities			derivative financial instruments
	Balance, December 31, 2011	$	38.5		$	(928.3	)	$	0.6		$	(0.3	)	$	(889.5	)
	Other comprehensive (loss) income before	0.5			(13.5		)	—			1.2			(11.8		)
	reclassifications, before income tax
	Amounts reclassified from accumulated	—			72.2			(1.1		)	(0.4		)	70.7
	other comprehensive income, before
	income tax
	Income tax (benefit) expense	—			(24.5		)	0.4			(0.3		)	(24.4		)
	Net current period other comprehensive	0.5			34.2			(0.7		)	0.5			34.5
	(loss) income, net of income taxes
	Non-controlling interest	—			—			0.1			—			0.1
	Net current period comprehensive (loss)	0.5			34.2			(0.6		)	0.5			34.6
	income, net of income taxes and
	non-controlling interest
	Balance, September 30, 2012	$	39		$	(894.1	)	$	—		$	0.2		$	(854.9	)

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Reconciliation of the numerator and the denominator of basic earnings per share and diluted earnings per share	'
	The following table sets forth the reconciliation of the numerator and the denominator of basic earnings per share and diluted earnings per share for the three months and nine months ended September 30, 2013 and 2012:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Numerator:
	Net income attributable to The Timken Company	$	52.2	$	80.9	$	210.1	$	420.2
	Less: undistributed earnings allocated to nonvested stock	0.1		0.2		0.2		1.3
	Net income available to common shareholders for basic	$	52.1	$	80.7	$	209.9	$	418.9
	earnings per share and diluted earnings per share
	Denominator:
	Weighted average number of shares outstanding, basic	94,667,659		96,356,772		95,391,695		96,981,922
	Effect of dilutive securities:
	Stock options and awards based on the treasury	740,410		766,401		856,516		933,878
	stock method
	Weighted average number of shares outstanding,	95,408,069		97,123,173		96,248,211		97,915,800
	assuming dilution of stock options and awards
	Basic earnings per share	$	0.55	$	0.84	$	2.2	$	4.32
	Diluted earnings per share	$	0.54	$	0.83	$	2.18	$	4.28

Segment_Information_Tables

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Segment wise financial performance	'
	The primary measurement used by management to measure the financial performance of each segment is EBIT (earnings before interest and taxes).
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Net sales to external customers:
	Mobile Industries	$	348		$	396.7		$	1,137.50		$	1,314.00
	Process Industries	307.2			309.8			907.8			1,000.50
	Aerospace	76.3			84			240.8			262.5
	Steel	330			352			991.8			1,329.70
		$	1,061.50		$	1,142.50		$	3,277.90		$	3,906.70
	Intersegment sales:
	Mobile Industries	$	0.1		$	0.2		$	0.8		$	0.4
	Process Industries	1.1			1.3			3.1			3.9
	Steel	20.5			25			58.9			82.6
		$	21.7		$	26.5		$	62.8		$	86.9
	Segment EBIT:
	Mobile Industries	$	29.1		$	37.9		$	132.7		$	173.4
	Process Industries	50.8			60.1			148			213.7
	Aerospace	4.9			7.7			21.4			26.3
	Steel	29.2			49.7			107.3			226.6
	Total EBIT for reportable segments	$	114		$	155.4		$	409.4		$	640
	Unallocated corporate expenses	(24.3		)	(20.1		)	(67.0		)	(63.8		)
	CDSOA receipts, net of expense	—			(0.9		)	—			108.6
	Interest expense	(4.9		)	(7.3		)	(17.5		)	(24.0		)
	Interest income	0.5			0.6			1.5			2
	Intersegment adjustments	(0.4		)	0.4			1.2			(1.3		)
	Income before income taxes	$	84.9		$	128.1		$	327.6		$	661.5

Impairment_and_Restructuring_C1

Impairment and Restructuring Charges (Tables)	9 Months Ended
	Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]	'
Schedule of Restructuring and Related Costs	'
	Impairment and restructuring charges by segment are comprised of the following:
	For the three months ended September 30, 2013:
		Mobile Industries			Process Industries			Total
	Severance and related benefit costs	$	3.1		$	0.1		$	3.2
	Exit costs	0.2			0.3			0.5
	Total	$	3.3		$	0.4		$	3.7
	For the three months ended September 30, 2012:
		Mobile Industries			Process Industries			Total
	Impairment charges	$	6.4		$	—		$	6.4
	Severance and related benefit costs	0.3			1			1.3
	Exit costs	4.2			—			4.2
	Total	$	10.9		$	1		$	11.9
	For the nine months ended September 30, 2013:
		Mobile Industries			Process Industries			Total
	Severance and related benefit costs	$	9.9		$	0.3		$	10.2
	Exit costs	1.1			0.3			1.4
	Total	$	11		$	0.6		$	11.6
	For the nine months ended September 30, 2012:
		Mobile Industries			Process Industries			Total
	Impairment charges	$	6.4		$	—		$	6.4
	Severance expense and related benefit costs	16.6			1.3			17.9
	Exit costs	4.5			—			4.5
	Total	$	27.5		$	1.3		$	28.8
Roll Forward consolidated restructuring accrual	'
	The following is a rollforward of the consolidated restructuring accrual for the nine months ended September 30, 2013 and the twelve months ended December 31, 2012:
		September 30,			December 31,
		2013			2012
	Beginning balance, January 1	$	17.6		$	21.8
	Expense	4.9			12.2
	Payments	(12.6		)	(16.4		)
	Ending balance	$	9.9		$	17.6

Retirement_and_Postretirement_1

Retirement and Postretirement Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]	'
Net periodic benefit cost for the Company's retirement benefit plans	'
	The following table sets forth the net periodic benefit cost for the Company’s defined benefit pension and postretirement benefit plans. The amounts for the three months and nine months ended September 30, 2013 are based on updated actuarial calculations prepared during the second quarter of 2013. The net periodic benefit cost recorded for the three months and nine months ended September 30, 2013 is the Company’s best estimate of each period’s proportionate share of the amounts to be recorded for the year ending December 31, 2013.
		Pension						Postretirement
		Three Months Ended						Three Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Components of net periodic benefit cost:
	Service cost	$	9.6		$	8.7		$	0.7		$	0.6
	Interest cost	33.6			37.7			5.1			7
	Expected return on plan assets	(57.8		)	(55.3		)	(2.5		)	(2.7		)
	Amortization of prior service cost (credit)	1.1			2.3			(0.1		)	—
	Amortization of net actuarial loss	29.2			20.8			0.6			0.6
	Pension curtailments and settlements	1.5			—			—			—
	Net periodic benefit cost	$	17.2		$	14.2		$	3.8		$	5.5
		Pension						Postretirement
		Nine Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Components of net periodic benefit cost:
	Service cost	$	28.9		$	25.9		$	2.2		$	1.9
	Interest cost	100.9			113.3			15.9			20.9
	Expected return on plan assets	(174.0		)	(165.8		)	(8.3		)	(8.0		)
	Amortization of prior service cost (credit)	3.4			7			(0.2		)	(0.2		)
	Amortization of net actuarial loss	87.5			62.5			1.8			1.9
	Pension curtailments and settlements	6.7			10.7			—			—
	Net periodic benefit cost	$	53.4		$	53.6		$	11.4		$	16.5

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income taxes	'
	The Company's provision for income taxes in interim periods is computed by applying the appropriate estimated annual effective tax rates to income or loss before income taxes for the period. In addition, non-recurring or discrete items, including interest on prior year tax liabilities, are recorded during the period(s) in which they occur.
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Provision for income taxes	$	32.4		$	47		$	117.3		$	241
	Effective tax rate	38.2		%	36.7		%	35.8		%	36.4		%

Fair_Value_Tables

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Assets and liabilities measured at fair value on a recurring basis	'
	The following table presents the fair value hierarchy for those financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2013 and December 31, 2012:
		30-Sep-13
		Total		Level 1		Level 2		Level 3
	Assets:
	Cash and cash equivalents	$	418.1	$	322	$	96.1	$	—
	Short-term investments	28.3		—		28.3		—
	Foreign currency hedges	0.9		—		0.9		—
	Total Assets	$	447.3	$	322	$	125.3	$	—
	Liabilities:
	Foreign currency hedges	$	3.8	$	—	$	3.8	$	—
	Total Liabilities	$	3.8	$	—	$	3.8	$	—
		December 31, 2012
		Total		Level 1		Level 2		Level 3
	Assets:
	Cash and cash equivalents	$	586.4	$	303.9	$	282.5	$	—
	Short-term investments	31.3		—		31.3		—
	Foreign currency hedges	1.2		—		1.2		—
	Total Assets	$	618.9	$	303.9	$	315	$	—
	Liabilities:
	Foreign currency hedges	$	1.9	$	—	$	1.9	$	—
	Total Liabilities	$	1.9	$	—	$	1.9	$	—

Basis_of_Presentation_Transact

Basis of Presentation Transaction Costs (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Transaction Costs [Abstract]	'
Transaction Costs	$125

Acquisitions_Details

Acquisitions (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Business Acquisition [Line Items]	'
Accounts receivable, net	$10.70
Inventories, net	13.7
Deferred charges and prepaid expenses	0.3
Other current assets	0.7
Property, plant and equipment, net	20.4
Goodwill	18.9
Other intangible assets	11.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	0
Total assets acquired	75.9
Accounts payable, trade	4.1
Salaries, wages and benefits	1.3
Other current liabilities	1.2
Other non-current liabilities	4.4
Total liabilities assumed	11
Net assets acquired	$64.90

Acquisitions_Details_1

Acquisitions (Details 1) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Business Acquisition Purchase price allocation identifiable intangible assets	'
Intangibles	$11.20
Initial Price Allocation [Member]	'
Business Acquisition Purchase price allocation identifiable intangible assets	'
Intangibles	11.2
Know-how [Member]	'
Business Acquisition Purchase price allocation identifiable intangible assets	'
Intangible Assets, Weighted Average Life	'15 years
Intangibles	5.7
All customer relationships [Member]	'
Business Acquisition Purchase price allocation identifiable intangible assets	'
Intangible Assets, Weighted Average Life	'20 years
Intangibles	4.3
Non-compete agreements [Member]	'
Business Acquisition Purchase price allocation identifiable intangible assets	'
Intangible Assets, Weighted Average Life	'4 years
Intangibles	0.3
Trade name [Member]	'
Business Acquisition Purchase price allocation identifiable intangible assets	'
Intangible Assets, Weighted Average Life	'8 years
Intangibles	$0.90

Acquisitions_Details_Textual

Acquisitions (Details Textual) (USD $)	0 Months Ended	12 Months Ended		12 Months Ended			3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 11, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Apr. 11, 2013	Sep. 30, 2013	Dec. 31, 2012	13-May-13
	Interlube [Member]	Interlube [Member]	Interlube [Member]	Smith Services [Member]	Smith Services [Member]	Smith Services [Member]	Standard Machine [Member]	Standard Machine [Member]	Standard Machine [Member]
			Person		Person		Person
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'
Cash Acquired from Acquisition	$0.30	'	'	'	'	'	$0.10	'	'
Entity Number of Employees	'	'	90	'	140	'	125	'	'
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period	'	13	'	17	'	'	'	31	'
Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds	$14.80	'	'	'	'	$13.20	'	'	$36.90

Inventories_Details

Inventories (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Inventories, net:	'	'
Manufacturing supplies	$55.40	$64.30
Raw materials	105.1	110.7
Work in process	324.8	278.1
Finished products	399	430.4
Subtotal	884.3	883.5
Allowance for obsolete and surplus inventory	-28.2	-21.4
Total Inventories, net	$856.10	$862.10

Inventories_Details_Textual

Inventories (Details Textual) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Inventories (Textual) [Abstract]	'	'	'	'	'
Percentage of LIFO Inventory	55.00%	'	55.00%	'	'
Percentage of FIFO Inventory	45.00%	'	45.00%	'	'
Inventory Reserve (LIFO)	$288.90	'	$288.90	'	$280.60
Increase (decrease) in inventory reserve (LIFO)	7.7	3.7	8.3	12.9	'
Amount expected to be recognized in LIFO expenses by the end of the year	'	'	10.3	'	'
The percentage increase in costs creating the increase to the current LIFO expense estimate	'	'	1.00%	'	'
Increase in current LIFO expense estimate due to one percent increase in costs	'	'	5.9	'	'
The percentage increase in inventory quantities that would have an effect on the current LIFO expense estimate	'	'	1.00%	'	'
Increase in current LIFO expense estimate due to one percent increase in inventory	'	'	$0	'	'

Property_Plant_and_Equipment_D

Property, Plant and Equipment (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Property, Plant and Equipment:	'	'
Land and buildings	$668.30	$653.80
Machinery and equipment	3,315	3,138.30
Subtotal	3,983.30	3,792.10
Accumulated depreciation	-2,485	-2,386.80
Property, Plant and Equipment, net	$1,498.30	$1,405.30

Property_Plant_and_Equipment_D1

Property, Plant and Equipment (Details Textual) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Property Plant and Equipment (Textual) [Abstract]	'	'	'
Depreciation expense	$131	$134.50	'
Carrying amount of capitalized computer software included in Machinery and equipment	82.5	'	84.9
Interest Costs Capitalized	8.6	2.9	'
Computer software [Member]	'	'	'
Property Plant and Equipment (Textual) [Abstract]	'	'	'
Depreciation expense	$18.80	$17.60	'

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Change in the carrying amount of Goodwill	'
Goodwill, Beginning Balance	$338.90
Goodwill, Acquisitions	18.9
Goodwill, Other	1.9
Goodwill, Ending Balance	359.7
Mobile Industries [Member]	'
Change in the carrying amount of Goodwill	'
Goodwill, Beginning Balance	17.7
Goodwill, Acquisitions	4.3
Goodwill, Other	0.3
Goodwill, Ending Balance	22.3
Process Industries [Member]	'
Change in the carrying amount of Goodwill	'
Goodwill, Beginning Balance	146.4
Goodwill, Acquisitions	14.6
Goodwill, Other	1.5
Goodwill, Ending Balance	162.5
Aerospace [Member]	'
Change in the carrying amount of Goodwill	'
Goodwill, Beginning Balance	162.2
Goodwill, Acquisitions	0
Goodwill, Other	0.1
Goodwill, Ending Balance	162.3
Steel [Member]	'
Change in the carrying amount of Goodwill	'
Goodwill, Beginning Balance	12.6
Goodwill, Acquisitions	0
Goodwill, Other	0
Goodwill, Ending Balance	$12.60

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets (Details 1) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Intangible assets subject to amortization:	'	'
Intangible assets, Gross Carrying Amount	$279.10	$268.60
Intangible assets, Accumulated Amortization	88.6	75.4
Intangible assets, Net Carrying Amount	190.5	193.2
Intangible assets not subject to amortization:	'	'
Indefinite Lived Intangible Assets Net	31.5	31.5
Total intangible assets, Gross Carrying Amount	310.6	300.1
Total intangible assets, Net Carrying Amount	222	224.7
Customer relationships [Member]	'	'
Intangible assets subject to amortization:	'	'
Intangible assets, Gross Carrying Amount	165.1	159.6
Intangible assets, Accumulated Amortization	48.1	38.1
Intangible assets, Net Carrying Amount	117	121.5
Know-how [Member]	'	'
Intangible assets subject to amortization:	'	'
Intangible assets, Gross Carrying Amount	31.9	26.1
Intangible assets, Accumulated Amortization	4	2.8
Intangible assets, Net Carrying Amount	27.9	23.3
Industrial license agreements [Member]	'	'
Intangible assets subject to amortization:	'	'
Intangible assets, Gross Carrying Amount	0.2	0.2
Intangible assets, Accumulated Amortization	0.1	0.1
Intangible assets, Net Carrying Amount	0.1	0.1
Land-use rights [Member]	'	'
Intangible assets subject to amortization:	'	'
Intangible assets, Gross Carrying Amount	8.8	8.6
Intangible assets, Accumulated Amortization	4.4	4.1
Intangible assets, Net Carrying Amount	4.4	4.5
Patents [Member]	'	'
Intangible assets subject to amortization:	'	'
Intangible assets, Gross Carrying Amount	2.3	2.5
Intangible assets, Accumulated Amortization	1.8	1.8
Intangible assets, Net Carrying Amount	0.5	0.7
Technology use [Member]	'	'
Intangible assets subject to amortization:	'	'
Intangible assets, Gross Carrying Amount	46.3	47
Intangible assets, Accumulated Amortization	12.9	11.5
Intangible assets, Net Carrying Amount	33.4	35.5
Trademarks [Member]	'	'
Intangible assets subject to amortization:	'	'
Intangible assets, Gross Carrying Amount	4.3	4.2
Intangible assets, Accumulated Amortization	2.5	3.4
Intangible assets, Net Carrying Amount	1.8	0.8
PMA licenses [Member]	'	'
Intangible assets subject to amortization:	'	'
Intangible assets, Gross Carrying Amount	8.8	8.8
Intangible assets, Accumulated Amortization	3.9	3.6
Intangible assets, Net Carrying Amount	4.9	5.2
Non-compete agreements [Member]	'	'
Intangible assets subject to amortization:	'	'
Intangible assets, Gross Carrying Amount	4.2	4.4
Intangible assets, Accumulated Amortization	3.7	3.3
Intangible assets, Net Carrying Amount	0.5	1.1
Unpatented technology [Member]	'	'
Intangible assets subject to amortization:	'	'
Intangible assets, Gross Carrying Amount	7.2	7.2
Intangible assets, Accumulated Amortization	7.2	6.7
Intangible assets, Net Carrying Amount	0	0.5
Tradename [Member]	'	'
Intangible assets subject to amortization:	'	'
Intangible assets, Accumulated Amortization	0	0
Intangible assets, Net Carrying Amount	17.3	17.3
Intangible assets not subject to amortization:	'	'
Trade name	17.3	17.3
Air Transportation Equipment [Member]	'	'
Intangible assets subject to amortization:	'	'
Intangible assets, Accumulated Amortization	0	0
Intangible assets not subject to amortization:	'	'
FAA air agency certificates	$14.20	$14.20

Goodwill_and_Other_Intangible_4

Goodwill and Other Intangible Assets (Details Textual) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Goodwill and Intangible Assets Disclosure [Abstract]	'	'
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount	$0.90	'
Goodwill and Other Intangible Assets (Textual) [Abstract]	'	'
Amortization expense for intangible assets	13.7	14.3
Future Amortization Expense Year 2013	18.9	'
Future Amortization Expense Year 2014	18.7	'
Future Amortization Expense Year 2015	18.6	'
Future Amortization Expense Year 2016	18.3	'
Future Amortization Expense Year 2017	$17.90	'
Finite-Lived Intangible Assets, Remaining Amortization Period	'15 years	'

Financing_Arrangements_Details

Financing Arrangements (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Short-term debt	'	'
Short-term debt	$21.10	$14.30
Line of Credit [Member] | Foreign Subsidiary [Member]	'	'
Short-term debt	'	'
Short-term debt	$21.10	$14.30

Financing_Arrangements_Details1

Financing Arrangements (Details 1) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Long-term debt	'	'
Total Long-term debt	$455.50	$464.70
Less current maturities	250.1	9.6
Long-term debt	205.4	455.1
Series A Medium Term Note [Member]	'	'
Long-term debt	'	'
Total Long-term debt	175	175
Senior Unsecured Notes [Member]	'	'
Long-term debt	'	'
Total Long-term debt	249.9	249.9
Ohio Water Development Revenue Refunding Bonds [Member]	'	'
Long-term debt	'	'
Total Long-term debt	12.2	12.2
Ohio Air Quality Development Revenue Refunding Bonds [Member]	'	'
Long-term debt	'	'
Total Long-term debt	9.5	9.5
Ohio Pollution Control Revenue Refunding Bonds [Member]	'	'
Long-term debt	'	'
Total Long-term debt	8.5	8.5
Other Long Term Debt [Member]	'	'
Long-term debt	'	'
Total Long-term debt	$0.40	$9.60

Financing_Arrangements_Details2

Financing Arrangements (Details Textual) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Arrangements (Textual) [Abstract]	'	'
Total Long-term debt	$455.50	$464.70
Series A Medium Term Note [Member]	'	'
Financing Arrangements (Textual) [Abstract]	'	'
Total Long-term debt	175	175
Fixed-rate Medium-Term Notes, Series A, Interest rate, Minimum	6.74%	'
Fixed-rate Medium-Term Notes, Series A, Interest rate, Maximum	7.76%	'
Debt Instruments, Maturity Date	1-May-28	'
Ohio Pollution Control Revenue Refunding Bonds [Member]	'	'
Financing Arrangements (Textual) [Abstract]	'	'
Total Long-term debt	8.5	8.5
Debt Instrument, Interest rate	0.15%	'
Debt Instruments, Maturity Date	1-Jun-33	'
Senior Unsecured Notes [Member]	'	'
Financing Arrangements (Textual) [Abstract]	'	'
Total Long-term debt	249.9	249.9
Debt Instrument, Interest rate	6.00%	'
Debt Instruments, Maturity Date	15-Sep-14	'
Ohio Water Development Revenue Refunding Bonds [Member]	'	'
Financing Arrangements (Textual) [Abstract]	'	'
Total Long-term debt	12.2	12.2
Debt Instrument, Interest rate	0.07%	'
Debt Instruments, Maturity Date	1-Nov-25	'
Ohio Air Quality Development Revenue Refunding Bonds [Member]	'	'
Financing Arrangements (Textual) [Abstract]	'	'
Total Long-term debt	9.5	9.5
Debt Instrument, Interest rate	0.15%	'
Debt Instruments, Maturity Date	1-Nov-25	'
Foreign Subsidiary [Member]	'	'
Financing Arrangements (Textual) [Abstract]	'	'
Maximum borrowing capacity under line of credit	226.6	'
Borrowings outstanding	21.1	'
Borrowings guarantees	0.7	'
Remaining Borrowing Capacity under Line of Credit Facility of Company's foreign subsidiaries	204.8	'
Line of Credit Accounts Receivable Securitization [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Line of Credit Facility, Current Borrowing Capacity	180.2	'
Financing Arrangements (Textual) [Abstract]	'	'
Maximum borrowing capacity under line of credit	200	'
Borrowings outstanding	0	'
Line of credit expiration date	30-Nov-15	'
Senior Credit Facility [Member]	'	'
Financing Arrangements (Textual) [Abstract]	'	'
Maximum borrowing capacity under line of credit	500	'
Borrowings outstanding	0	'
Remaining Borrowing Capacity under Line of Credit Facility of Company's foreign subsidiaries	491.4	'
Line of credit expiration date	11-May-16	'
Number of Financial Covenant under senior Credit Facility	2	'
Variable Rate Lines of Credit [Member]	'	'
Financing Arrangements (Textual) [Abstract]	'	'
Line of credit stated variable interest rate, Low Range	0.82%	0.61%
Line of Credit stated variable interest rate, High Range	4.86%	2.28%
Letter of Credit [Member] | Senior Credit Facility [Member]	'	'
Financing Arrangements (Textual) [Abstract]	'	'
Borrowings outstanding	$8.60	'

Equity_Details

Equity (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Shareholding pattern	'	'	'	'
Beginning Balance	'	'	$2,246.60	'
Net income	52.5	81.1	210.3	420.5
Foreign currency translation adjustments	15.2	16.5	-19.3	0.5
Pension and postretirement liability adjustment (net of the income tax benefit of $32.7 million)	14.3	12.2	71.1	34.2
Change in ownership of non-controlling interest	'	'	8.9	'
Dividends declared to noncontrolling interest	'	'	-0.6	'
Dividends - $0.69 per share	'	'	-66	'
Excess tax benefit from stock compensation	'	'	10.4	'
Stock-based compensation expense	'	'	12.8	'
Stock purchased at cost	'	'	-107.4	'
Stock option exercise activity	'	'	7.6	'
Restricted shares surrendered (issued)	'	'	1.1	'
Shares surrendered for taxes	'	'	-8.4	'
Ending Balance	2,367.10	'	2,367.10	'
Stated Capital [Member]	'	'	'	'
Shareholding pattern	'	'	'	'
Beginning Balance	'	'	53.1	'
Net income	'	'	'	'
Foreign currency translation adjustments	'	'	'	'
Pension and postretirement liability adjustment (net of the income tax benefit of $32.7 million)	'	'	'	'
Dividends declared to noncontrolling interest	'	'	'	'
Dividends - $0.69 per share	'	'	'	'
Excess tax benefit from stock compensation	'	'	'	'
Stock-based compensation expense	'	'	'	'
Stock purchased at cost	'	'	'	'
Stock option exercise activity	'	'	'	'
Restricted shares surrendered (issued)	'	'	'	'
Shares surrendered for taxes	'	'	'	'
Ending Balance	53.1	'	53.1	'
Other Paid-In Capital [Member]	'	'	'	'
Shareholding pattern	'	'	'	'
Beginning Balance	'	'	891.4	'
Net income	'	'	'	'
Foreign currency translation adjustments	'	'	'	'
Pension and postretirement liability adjustment (net of the income tax benefit of $32.7 million)	'	'	'	'
Change in ownership of non-controlling interest	'	'	1.3	'
Dividends declared to noncontrolling interest	'	'	'	'
Dividends - $0.69 per share	'	'	'	'
Excess tax benefit from stock compensation	'	'	10.4	'
Stock-based compensation expense	'	'	12.8	'
Stock purchased at cost	'	'	'	'
Stock option exercise activity	'	'	-20.6	'
Restricted shares surrendered (issued)	'	'	-3.7	'
Shares surrendered for taxes	'	'	'	'
Ending Balance	891.6	'	891.6	'
Earnings Invested in the Business [Member]	'	'	'	'
Shareholding pattern	'	'	'	'
Beginning Balance	'	'	2,411.20	'
Net income	'	'	210.1	'
Foreign currency translation adjustments	'	'	'	'
Pension and postretirement liability adjustment (net of the income tax benefit of $32.7 million)	'	'	'	'
Dividends declared to noncontrolling interest	'	'	'	'
Dividends - $0.69 per share	'	'	-66	'
Excess tax benefit from stock compensation	'	'	'	'
Stock-based compensation expense	'	'	'	'
Stock purchased at cost	'	'	'	'
Stock option exercise activity	'	'	'	'
Restricted shares surrendered (issued)	'	'	'	'
Shares surrendered for taxes	'	'	'	'
Ending Balance	2,555.30	'	2,555.30	'
Accumulated Other Comprehensive (Loss) [Member]	'	'	'	'
Shareholding pattern	'	'	'	'
Beginning Balance	'	'	-1,013.20	'
Net income	'	'	'	'
Foreign currency translation adjustments	'	'	-11.5	'
Pension and postretirement liability adjustment (net of the income tax benefit of $32.7 million)	'	'	71.1	'
Dividends declared to noncontrolling interest	'	'	'	'
Dividends - $0.69 per share	'	'	'	'
Excess tax benefit from stock compensation	'	'	'	'
Stock-based compensation expense	'	'	'	'
Stock purchased at cost	'	'	'	'
Stock option exercise activity	'	'	'	'
Restricted shares surrendered (issued)	'	'	'	'
Shares surrendered for taxes	'	'	'	'
Ending Balance	-953.6	'	-953.6	'
Treasury Stock [Member]	'	'	'	'
Shareholding pattern	'	'	'	'
Beginning Balance	'	'	-110.3	'
Net income	'	'	'	'
Foreign currency translation adjustments	'	'	'	'
Pension and postretirement liability adjustment (net of the income tax benefit of $32.7 million)	'	'	'	'
Dividends declared to noncontrolling interest	'	'	'	'
Dividends - $0.69 per share	'	'	'	'
Excess tax benefit from stock compensation	'	'	'	'
Stock-based compensation expense	'	'	'	'
Stock purchased at cost	'	'	-107.4	'
Stock option exercise activity	'	'	28.2	'
Restricted shares surrendered (issued)	'	'	4.8	'
Shares surrendered for taxes	'	'	-8.4	'
Ending Balance	-193.1	'	-193.1	'
Noncontrolling Interest [Member]	'	'	'	'
Shareholding pattern	'	'	'	'
Beginning Balance	'	'	14.4	'
Net income	'	'	0.2	'
Foreign currency translation adjustments	'	'	-7.8	'
Pension and postretirement liability adjustment (net of the income tax benefit of $32.7 million)	'	'	0	'
Change in ownership of non-controlling interest	'	'	7.6	'
Dividends declared to noncontrolling interest	'	'	-0.6	'
Dividends - $0.69 per share	'	'	'	'
Excess tax benefit from stock compensation	'	'	'	'
Stock-based compensation expense	'	'	'	'
Stock purchased at cost	'	'	'	'
Stock option exercise activity	'	'	'	'
Restricted shares surrendered (issued)	'	'	'	'
Shares surrendered for taxes	'	'	'	'
Ending Balance	$13.80	'	$13.80	'

Equity_Details_Textual

Equity (Details Textual) (USD $)	3 Months Ended	9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012
Class of Stock [Line Items]	'	'	'
Proceeds from Issuance or Sale of Equity	$8.90	$8.90	$0
Previous Controlling Interest, Ownership Percentage by Controlling Owners in Subsidiary	80.00%	80.00%	'
Current Interest, Ownership Percentage by Controlling Owners in Subsidiary	75.00%	75.00%	'
Equity (Textual) [Abstract]	'	'	'
Pension and postretirement liability adjustment, Tax	'	$32.70	'
Dividend per share	'	$0.69	'

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income [Roll Forward]	'	'	'	'
Beginning Balance	($985.40)	($882.50)	($1,013.20)	($889.50)
Other comprehensive (loss) income before reclassifications, before income tax	6.2	12.3	-14.5	-11.8
Amounts reclassified from accumulated other comprehensive income, before income tax	32.1	22.8	98.8	70.7
Income tax (benefit) expense	-10	-7.5	-32.5	-24.4
Net current period other comprehensive (loss) income, net of income taxes	28.3	27.6	51.8	34.5
Non-controlling interest	3.5	'	7.8	0.1
Net current period comprehensive (loss) income, net of income taxes and non-controlling interest	31.8	27.6	59.6	34.6
Ending Balance	-953.6	-854.9	-953.6	-854.9
Foreign currency translation adjustment [Member]	'	'	'	'
Accumulated Other Comprehensive Income [Roll Forward]	'	'	'	'
Beginning Balance	18.8	22.5	49	38.5
Other comprehensive (loss) income before reclassifications, before income tax	15.2	16.5	-19.3	0.5
Amounts reclassified from accumulated other comprehensive income, before income tax	0	0	0	0
Income tax (benefit) expense	0	0	0	0
Net current period other comprehensive (loss) income, net of income taxes	15.2	'	-19.3	0.5
Non-controlling interest	3.5	'	7.8	0
Net current period comprehensive (loss) income, net of income taxes and non-controlling interest	18.7	16.5	-11.5	0.5
Ending Balance	37.5	39	37.5	39
Pension and postretirement liability adjustment [Member]	'	'	'	'
Accumulated Other Comprehensive Income [Roll Forward]	'	'	'	'
Beginning Balance	-1,004.70	-906.3	-1,061.50	-928.3
Other comprehensive (loss) income before reclassifications, before income tax	-7.3	-3.3	4.6	-13.5
Amounts reclassified from accumulated other comprehensive income, before income tax	32.3	23.6	99.2	72.2
Income tax (benefit) expense	-10.7	-8.1	-32.7	-24.5
Net current period other comprehensive (loss) income, net of income taxes	14.3	'	71.1	34.2
Non-controlling interest	0	'	0	0
Net current period comprehensive (loss) income, net of income taxes and non-controlling interest	14.3	12.2	71.1	34.2
Ending Balance	-990.4	-894.1	-990.4	-894.1
Fair Value of Marketable Securities [Member]	'	'	'	'
Accumulated Other Comprehensive Income [Roll Forward]	'	'	'	'
Beginning Balance	'	0.2	'	0.6
Other comprehensive (loss) income before reclassifications, before income tax	'	0	'	0
Amounts reclassified from accumulated other comprehensive income, before income tax	'	-0.2	'	-1.1
Income tax (benefit) expense	'	0	'	0.4
Net current period other comprehensive (loss) income, net of income taxes	'	'	'	-0.7
Non-controlling interest	'	'	'	0.1
Net current period comprehensive (loss) income, net of income taxes and non-controlling interest	'	-0.2	'	-0.6
Ending Balance	'	0	'	0
Derivative financial instruments fair value adjustment [Member]	'	'	'	'
Accumulated Other Comprehensive Income [Roll Forward]	'	'	'	'
Beginning Balance	0.5	1.1	-0.7	-0.3
Other comprehensive (loss) income before reclassifications, before income tax	-1.7	-0.9	0.2	1.2
Amounts reclassified from accumulated other comprehensive income, before income tax	-0.2	-0.6	-0.4	-0.4
Income tax (benefit) expense	0.7	0.6	0.2	-0.3
Net current period other comprehensive (loss) income, net of income taxes	-1.2	'	0	0.5
Non-controlling interest	0	'	0	0
Net current period comprehensive (loss) income, net of income taxes and non-controlling interest	-1.2	-0.9	0	0.5
Ending Balance	($0.70)	$0.20	($0.70)	$0.20

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator:	'	'	'	'
Net income attributable to The Timken Company	$52.20	$80.90	$210.10	$420.20
Less: undistributed earnings allocated to nonvested stock	0.1	0.2	0.2	1.3
Net income available to common shareholders for basic earnings per share and diluted earnings per share	$52.10	$80.70	$209.90	$418.90
Denominator:	'	'	'	'
Weighted average number of shares outstanding, basic	94,667,659	96,356,772	95,391,695	96,981,922
Effect of dilutive securities:	'	'	'	'
Stock options and awards based on the treasury stock method	740,410	766,401	856,516	933,878
Weighted average number of shares outstanding, assuming dilution of stock options and awards	95,408,069	97,123,173	96,248,211	97,915,800
Basic earnings per share	$0.55	$0.84	$2.20	$4.32
Diluted earnings per share	$0.54	$0.83	$2.18	$4.28

Earnings_Per_Share_Details_Tex

Earnings Per Share (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share (Textual) [Abstract]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	1,299,460	306,767	739,577

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net sales to external customers:	'	'	'	'
Total Net sales to external customers	$1,061.50	$1,142.50	$3,277.90	$3,906.70
Intersegment sales:	'	'	'	'
Total Intersegment sales	21.7	26.5	62.8	86.9
Segment EBIT:	'	'	'	'
Total EBIT for reportable segments	114	155.4	409.4	640
Unallocated corporate expenses	-24.3	-20.1	-67	-63.8
CDSOA receipts, net of expense	0	-0.9	0	108.6
Interest expense	-4.9	-7.3	-17.5	-24
Interest income	0.5	0.6	1.5	2
Intersegment adjustments	-0.4	0.4	1.2	-1.3
Income Before Income Taxes	84.9	128.1	327.6	661.5
Mobile Industries [Member]	'	'	'	'
Net sales to external customers:	'	'	'	'
Total Net sales to external customers	348	396.7	1,137.50	1,314
Intersegment sales:	'	'	'	'
Total Intersegment sales	0.1	0.2	0.8	0.4
Segment EBIT:	'	'	'	'
Total EBIT for reportable segments	29.1	37.9	132.7	173.4
Process Industries [Member]	'	'	'	'
Net sales to external customers:	'	'	'	'
Total Net sales to external customers	307.2	309.8	907.8	1,000.50
Intersegment sales:	'	'	'	'
Total Intersegment sales	1.1	1.3	3.1	3.9
Segment EBIT:	'	'	'	'
Total EBIT for reportable segments	50.8	60.1	148	213.7
Aerospace [Member]	'	'	'	'
Net sales to external customers:	'	'	'	'
Total Net sales to external customers	76.3	84	240.8	262.5
Segment EBIT:	'	'	'	'
Total EBIT for reportable segments	4.9	7.7	21.4	26.3
Steel [Member]	'	'	'	'
Net sales to external customers:	'	'	'	'
Total Net sales to external customers	330	352	991.8	1,329.70
Intersegment sales:	'	'	'	'
Total Intersegment sales	20.5	25	58.9	82.6
Segment EBIT:	'	'	'	'
Total EBIT for reportable segments	$29.20	$49.70	$107.30	$226.60

Impairment_and_Restructuring_C2

Impairment and Restructuring Charges (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Impairment and Restructuring Charges for the Mobile Segment	'	'	'	'
Impairment charges	'	$6.40	'	$6.40
Severance expense and related benefit costs	3.2	1.3	10.2	17.9
Exit costs	0.5	4.2	1.4	4.5
Total	3.7	11.9	11.6	28.8
Mobile Industries [Member]	'	'	'	'
Impairment and Restructuring Charges for the Mobile Segment	'	'	'	'
Impairment charges	'	6.4	'	6.4
Severance expense and related benefit costs	3.1	0.3	9.9	16.6
Exit costs	0.2	4.2	1.1	4.5
Total	3.3	10.9	11	27.5
Process Industries [Member]	'	'	'	'
Impairment and Restructuring Charges for the Mobile Segment	'	'	'	'
Impairment charges	'	0	'	0
Severance expense and related benefit costs	0.1	1	0.3	1.3
Exit costs	0.3	0	0.3	0
Total	$0.40	$1	$0.60	$1.30

Impairment_and_Restructuring_C3

Impairment and Restructuring Charges (Details 1) (USD $)	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Roll Forward consolidated restructuring accrual	'	'
Beginning Balance	$17.60	$21.80
Expense	4.9	12.2
Payments	-12.6	-16.4
Ending Balance	$9.90	$17.60

Impairment_and_Restructuring_C4

Impairment and Restructuring Charges (Details Textual) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2012

Sep. 30, 2012

Dec. 31, 2010

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Environmental Restoration Costs [Member]

Mobile Industries [Member]

Mobile Industries [Member]

Mobile Industries [Member]

Mobile Industries [Member]

Mobile Industries [Member]

Mobile Industries [Member]

Mobile Industries [Member]

Mobile Industries [Member]

Mobile Industries [Member]

St. Thomas Ontario Canada [Member]

St. Thomas Ontario Canada [Member]

St. Thomas Ontario Canada [Member]

Pension Plans, Defined Benefit [Member]

Pension Plans, Defined Benefit [Member]

Pension Plans, Defined Benefit [Member]

Pension Plans, Defined Benefit [Member]

Sao Paulo [Member]

Sao Paulo [Member]

Sao Paulo [Member]

Sao Paulo [Member]

Sao Paulo [Member]

Positions

Environmental Restoration Costs [Member]

Restructuring and Related Cost [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring and Related Cost, Number of Positions Eliminated

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

190

'

'

'

'

'

Expected pretax costs approximately

'

'

'

'

'

'

'

'

'

'

'

'

'

$60

'

'

'

'

'

'

'

'

'

Cumulative pre tax

'

'

'

'

'

'

'

'

'

'

'

'

'

'

58.7

'

40.9

40.9

'

'

'

'

'

Exit costs

0.5

4.2

1.4

4.5

'

'

'

0.2

4.2

1.1

4.5

4.2

7.1

'

'

'

'

'

'

'

'

'

'

Restructuring accrual

9.9

'

9.9

'

17.6

21.8

4

'

'

'

'

'

'

'

'

3.2

'

'

'

'

'

'

'

Minimum estimated liability for the site

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3.2

'

'

'

'

'

'

'

'

Maximum estimated liability for the site

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7.2

'

'

'

'

'

'

'

'

Minimum restructuring and related cost expected cost approximatel

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

55

'

'

'

'

'

Maximum expected pretax costs approximately

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

65

'

'

'

'

'

Minimum expected cash pretax costs approximately

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20

'

'

'

'

'

Maximum expected pretax cash costs approximately

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25

'

'

'

'

'

Severance Costs

3.2

1.3

10.2

17.9

'

'

'

3.1

0.3

9.9

16.6

'

'

'

'

'

1.5

7.8

16.8

'

'

'

'

Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-1.5

0

-6.7

-10.7

Impairment charges

'

$6.40

'

$6.40

'

'

'

'

$6.40

'

$6.40

'

'

'

'

'

'

'

'

'

'

'

'

Retirement_and_Postretirement_2

Retirement and Postretirement Benefit Plans (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Pension [Member]	'	'	'	'
Components of net periodic benefit cost	'	'	'	'
Service cost	$9.60	$8.70	$28.90	$25.90
Interest cost	33.6	37.7	100.9	113.3
Expected return on plan assets	-57.8	-55.3	-174	-165.8
Amortization of prior service cost (credit)	1.1	2.3	3.4	7
Amortization of net actuarial loss	29.2	20.8	87.5	62.5
Pension curtailments and settlements	1.5	0	6.7	10.7
Net periodic benefit cost	17.2	14.2	53.4	53.6
Postretirement Benefit Plans [Member]	'	'	'	'
Components of net periodic benefit cost	'	'	'	'
Service cost	0.7	0.6	2.2	1.9
Interest cost	5.1	7	15.9	20.9
Expected return on plan assets	-2.5	-2.7	-8.3	-8
Amortization of prior service cost (credit)	-0.1	0	-0.2	-0.2
Amortization of net actuarial loss	0.6	0.6	1.8	1.9
Pension curtailments and settlements	0	0	0	0
Net periodic benefit cost	$3.80	$5.50	$11.40	$16.50

Income_Taxes_Details_1

Income Taxes (Details 1) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]	'	'	'	'
Provision for income taxes	$32.40	$47	$117.30	$241
Effective tax rate	38.20%	36.70%	35.80%	36.40%

Income_Taxes_Details_Textual

Income Taxes (Details Textual)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'	'
Effective tax rate on the pretax income relative to U.S. federal statutory	35.00%	35.00%

Fair_Value_Details

Fair Value (Details) (Fair Value, Measurements, Recurring [Member], USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Assets and Liabilities Measured at fair value on a recurring basis	'	'
Cash and cash equivalents	$418.10	$586.40
Short-term investments	28.3	31.3
Foreign currency hedges	0.9	1.2
Total Assets	447.3	618.9
Foreign currency hedges	3.8	1.9
Total Liabilities	3.8	1.9
Level 1 [Member]	'	'
Assets and Liabilities Measured at fair value on a recurring basis	'	'
Cash and cash equivalents	322	303.9
Short-term investments	0	0
Foreign currency hedges	0	0
Total Assets	322	303.9
Foreign currency hedges	0	0
Total Liabilities	0	0
Level 2 [Member]	'	'
Assets and Liabilities Measured at fair value on a recurring basis	'	'
Cash and cash equivalents	96.1	282.5
Short-term investments	28.3	31.3
Foreign currency hedges	0.9	1.2
Total Assets	125.3	315
Foreign currency hedges	3.8	1.9
Total Liabilities	3.8	1.9
Level 3 [Member]	'	'
Assets and Liabilities Measured at fair value on a recurring basis	'	'
Cash and cash equivalents	0	0
Short-term investments	0	0
Foreign currency hedges	0	0
Total Assets	0	0
Foreign currency hedges	0	0
Total Liabilities	$0	$0

Fair_Value_Details_Textual

Fair Value (Details Textual) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Fair Value (Additional Textual) [Abstract]	'	'	'	'
Maximum maturity period of cash and cash equivalent	'three months or less	'	'	'
Maturity period of short-term investments	'four months and one year	'	'	'
Cash and Cash Equivalents Level One Assets	$418.10	$586.40	$485.50	$464.80
Long-term fixed-rate debt, fair value	456.8	481.3	'	'
Long-term fixed-rate debt, carrying value	424.9	424.9	'	'
Fair Value, Measurements, Recurring [Member]	'	'	'	'
Fair Value (Additional Textual) [Abstract]	'	'	'	'
Cash and cash equivalents	418.1	586.4	'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'	'	'
Fair Value (Additional Textual) [Abstract]	'	'	'	'
Cash and cash equivalents	322	303.9	'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'	'	'	'
Fair Value (Additional Textual) [Abstract]	'	'	'	'
Cash and cash equivalents	$96.10	$282.50	'	'

Continued_Dumping_and_Subsidy_1

Continued Dumping and Subsidy Act (Details Textual) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2012
CDSOA [Abstract]	'
ContinuedDumpingAndSubsidyOffsetActNetofExpenses	$112.80