The Timken Company (TKR) 10-Q 30 Oct 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	9 Months Ended
	Sep. 30, 2018shares
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Entity Registrant Name	Timken Co.
Entity Central Index Key	98,362
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding	76,860,854

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue from Contract with Customer, Excluding Assessed Tax	$ 881.3	$ 771.4	$ 2,670.7	$ 2,225.8
Cost of Goods and Services Sold	628	555.3	1,885.1	1,626.4
Gross Profit	253.3	216.1	785.6	599.4
Selling, general and administrative expenses	142	134	432.4	375.5
Impairment and restructuring charges	2.6	1.3	3.1	3.8
Gain (Loss) on Disposition of Business			(0.6)	0
Operating Income (Loss)	108.7	80.8	350.1	220.1
Interest expense	(12.5)	(10.1)	(33.2)	(26.5)
Investment Income, Interest	0.6	0.7	1.5	2
Other (expense) income, net	0.5	3.8	9.8	7.1
Income (Loss) Before Income Taxes	97.3	75.2	328.2	202.7
Provision (benefit) for income taxes	25	21.1	83.5	28.5
Net Income	72.3	54.1	244.7	174.2
Net (loss) income attributable to noncontrolling interest	0.7	0.6	1.9	0
Net Income (loss) attributable to The Timken Company	$ 71.6	$ 53.5	$ 242.8	$ 174.2

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 72.3	$ 54.1	$ 244.7	$ 174.2
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(24.2)	10.9	(62.5)	42.8
Pension and postretirement liability adjustment (net of the income tax benefit of $1.5 million)	0	0.1	0	0.2
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(0.4)	(2)	4	(4.2)
Other comprehensive income	(24.6)	9	(58.5)	38.8
Comprehensive Income	47.7	63.1	186.2	213
Less: comprehensive (loss) income attributable to noncontrolling interest	(5)	0.5	(6.8)	1.9
Comprehensive Income attributable to The Timken Company	$ 52.7	$ 62.6	$ 193	$ 211.1

Consolidated Balance Sheets

Consolidated Balance Sheets $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Current Assets
Cash and cash equivalents	$ 153.7	$ 153.7	$ 121.6
Restricted cash	1.3	1.3	3.8
Accounts receivable, less allowances (2018 – $21.1 million; 2017 – $20.3 million)	548.6	548.6	524.9
Unbilled Receivables, Asset, Net	137.3	137.3	0
Inventories, net	841	841	738.9
Net Income (Loss) Attributable to Parent	71.6	242.8
Deferred charges and prepaid expenses	28.4	28.4	29.7
Other current assets	76	76	81.2
Total Current Assets	1,786.3	1,786.3	1,500.1
Property, Plant and Equipment, net	886.8	886.8	864.2
Other Assets
Goodwill	965.4	965.4	511.8
Non-current pension assets	21.7	21.7	19.7
Other intangible assets	743.1	743.1	420.6
Deferred income taxes	52.3	52.3	61
Other Assets, Noncurrent	43.9	43.9	25
Total Other Assets	1,826.4	1,826.4	1,038.1
Total Assets	4,499.5	4,499.5	3,402.4
Current Liabilities
Short-term debt	37	37	105.4
Current portion of long-term debt	11.4	11.4	2.7
Accounts payable, trade	282.8	282.8	265.2
Salaries, wages and benefits	133.5	133.5	127.9
Income taxes payable	19.2	19.2	9.8
Other current liabilities	172.7	172.7	160.7
Total Current Liabilities	656.6	656.6	671.7
Non-Current Liabilities
Long-term debt	1,681.7	1,681.7	854.2
Accrued pension cost	171.6	171.6	167.3
Accrued postretirement benefits cost	134	134	122.6
Deferred income taxes	152.4	152.4	44
Other non-current liabilities	62.8	62.8	67.7
Total Non-Current Liabilities	2,202.5	2,202.5	1,255.8
Shareholders' Equity
Class I and II Serial Preferred Stock, without par value: Authorized – 10,000,000 shares each class, none issued	0	0	0
Common Stock, Value, Outstanding	53.1	53.1	53.1
Other paid-in capital	945.1	945.1	903.8
Earnings invested in the business	1,595.4	1,595.4	1,408.4
Accumulated other comprehensive loss	(88.8)	(88.8)	(38.3)
Treasury shares at cost (2018 - 19,152,333 shares; 2017 - 20,672,133 shares)	924.9	924.9	884.3
Total Shareholders' Equity	1,579.9	1,579.9	1,442.7
Noncontrolling Interest	60.5	60.5	32.2
Total Equity	1,640.4	1,640.4	1,474.9
Total Liabilities and Shareholders' Equity	$ 4,499.5	$ 4,499.5	$ 3,402.4

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ / shares in Millions, $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Allowances for accounts receivable	$ 21.1	$ 20.3
Preferred stock, no par value (Class I & Class II Preferred stock)	$ 0	$ 0
Preferred stock, shares issued (Class I & Class II Preferred stock)	0	0
Common shares, no par value	$ 0	$ 0
Company common shares shares authorized	200,000,000	200,000,000
Common shares, shares issued	98,375,135	98,375,135
Treasury shares	21,514,281	20,758,013
Preferred Class A [Member]
Preferred stock, shares authorized (Class I & Class II Preferred stock)	10,000,000	10,000,000
Preferred Class B [Member]
Preferred stock, shares authorized (Class I & Class II Preferred stock)	10,000,000	10,000,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Operating Activities
Net Income (Loss) Attributable to Parent	$ 71.6	$ 53.5	$ 242.8	$ 174.2
Net (loss) income attributable to noncontrolling interest	0.7	0.6	1.9	0
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			105.9	102.5
Impairment charges			0.6	0
Loss on sale of assets			0.2	(2.6)
Gain (Loss) on Disposition of Business			0.6	0
Deferred income tax provision			2.2	7.5
Stock-based compensation expense			25.5	18.2
Pension and other postretirement expense			8.5	12.6
Pension contributions and other postretirement benefit payments			(12.4)	(16.3)
Changes in operating assets and liabilities:
Accounts receivable			(65.7)	(61.6)
Increase (Decrease) in Unbilled Receivables			(37.6)	0
Inventories			(94.3)	(85.4)
Accounts payable, trade			9.9	(55.7)
Other accrued expenses			(10.2)	(15.9)
Income taxes			0.5	59.6
Other, net			17	(18.2)
Net Cash Provided by Operating Activities			195	142.9
Investing Activities
Capital expenditures			(62.8)	(62.5)
Acquisitions, net of cash received			765.4	347.2
Proceeds from disposals of property, plant and equipment			1.1	6.8
Divestitures			14	0
Common Stock, Value, Outstanding				(4.2)
Proceeds from Sale and Maturity of Marketable Securities			2.3
Other			0.5	(0.3)
Net Cash Used by Investing Activities			(810.3)	(407.4)
Financing Activities
Cash dividends paid to shareholders			(64.2)	(62.4)
Purchase of treasury shares			(63)	(41)
Net proceeds from common share activity			12.7	27.7
Payments Related to Tax Withholding for Share-based Compensation			5.4	10.8
Proceeds from Accounts Receivable Securitization			145.2	51.2
Repayments of Accounts Receivable Securitization			114.9	25.3
Proceeds from Issuance of Long-term Debt			1,286.1	862.7
Payments on long-term debt			(533.1)	(574.4)
Payments of Financing Costs			0.9	1.1
Short-term debt activity, net			(3.9)	12.8
Proceeds from (Payments for) Other Financing Activities			(1.3)	(2.6)
Net Cash Used by Financing Activities			657.3	236.8
Effect of exchange rate changes on cash			(12.4)	16.6
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect			29.6	(11.1)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	155	$ 140.5	155	$ 140.5	$ 125.4	$ 151.6
Cash and cash equivalents beginning of period			121.6
Cash and cash equivalents end of period	$ 153.7		$ 153.7		$ 121.6

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2018
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 accompanying Notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017

Significant Accounting Policies

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Revenue Recognition, Policy [Policy Text Block]	The Company's significant accounting policies are detailed in "Note 1 - Significant Accounting Policies" of the Annual Report on Form 10-K for the year ended December 31, 2017. In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers (Topic 606)", which was adopted by the Company on January 1, 2018. Also, in March 2017, the FASB issued ASU 2017-07, “Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost", which was adopted by the Company on January 1, 2018. Significant changes to the Company's accounting policies as a result of adopting ASU 2014-09 (the “new revenue standard”) and ASU 2017-07 are discussed below: Revenue: A contract exists when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. Revenue is recognized when performance obligations under the terms of a contract with a customer of the Company are satisfied. A majority of the Company's revenue is from short-term, fixed-price contracts and continues to be recognized as of a point in time when products are shipped from the Company's manufacturing facilities or at a later point in time when control of the products transfers to the customer. Revenue was previously recognized for services and certain sales of customer-specific product at the point in time when the shipping terms were satisfied. Under the new revenue standard, the Company now recognizes revenue over time as it satisfies the performance obligations because of the continuous transfer of control to the customer, supported as follows: • For certain service contracts, this continuous transfer of control to the customer occurs as the Company's service enhances assets that the customer owns and controls at all times and the Company is contractually entitled to payment for work performed to date plus a reasonable margin. • For United States ("U.S.") government contracts, the customer is allowed to unilaterally terminate the contract for convenience, and is required to pay the Company for costs incurred plus a reasonable margin and can take control of any work in process. • For certain non-U.S. government contracts involving customer-specific products, the customer controls the work in process based on contractual termination clauses or restrictions on the Company's use of the product and the Company possesses a right to payment for work performed to date plus a reasonable margin. As a result of control transferring over time for these products and services, revenue is recognized based on progress toward completion of the performance obligation. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services to be provided. The Company has elected to use the cost-to-cost input measure of progress for these contracts because it best depicts the transfer of goods or services to the customer based on incurring costs on the contracts. Under the cost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Revenues are recorded proportionally as costs are incurred. The pricing and payment terms for non-U.S. government contracts is based on the Company's standard terms and conditions or the result of specific negotiations with each customer. The Company's standard terms and conditions require payment 30 days from the invoice date, but the timing of payment for specific negotiated terms may vary. The Company also has both prime and subcontracts in support of the provision of goods and services to the U.S. government. Certain of these contracts are subject to the Federal Acquisition Regulation ("FAR") and are priced commercially based on a competitive market. Under the payment terms of those U.S. government fixed-price contracts, the customer pays the Company performance-based payments, which are interim payments of up to 80% of the contract price for costs incurred to date based on quantifiable measures of performance or on the achievement of specified events or milestones. Because the customer retains a portion of the contract price until completion of such contracts, certain of these U.S. government fixed-price contracts result in revenue recognized in excess of billings, which is presented within "Unbilled Receivables" on the Consolidated Balance Sheet. The portion of the payments retained by the customer until final contract settlement is not considered a significant financing component because the intent is to protect the customer. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring goods or providing services. Sales, value add, and other taxes the Company collects concurrent with revenue-producing activities are excluded from revenue. As a practical expedient, the Company may exclude an assessment of whether promised goods or services are performance obligations, if they are immaterial in the context of the contract with the customer, and combine these with other performance obligations. The Company has elected to recognize incremental costs incurred to obtain contracts, which primarily represent commissions paid to third-party sales agents where the amortization period would be less than one year, as "Selling, general and administrative ("SG&A") expenses" in the Consolidated Statement of Income as incurred. The Company has also elected not to adjust the promised amount of consideration for the effects of any significant financing component where the Company expects, at contract inception, that the period between when the Company transfers a promised good or service to a customer and when the customer pays for that good or service will be one year or less. Finally, the Company's policy is to exclude performance obligations resulting from contracts with a duration of one year or less from its disclosures related to remaining performance obligations. The amount of consideration to which the Company expects to be entitled in exchange for the goods and services is not generally subject to significant variations. However, the Company does offer certain customers rebates, prompt payment discounts, end-user discounts, the right to return eligible products, and/or other forms of variable consideration. The Company estimates this variable consideration using the expected value amount, which is based on historical experience. The Company includes estimated amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. The Company adjusts the estimate of revenue at the earlier of when the amount of consideration the Company expects to receive changes or when the consideration becomes fixed. The Company recognizes the cost of freight and shipping when control of the products or services has transferred to the customer as an expense in "Cost of products sold" on the Consolidated Statement of Income, because those are costs incurred to fulfill the promise recognized, not a separate performance obligation. To the extent certain freight and shipping fees are charged to customers, the Company recognizes the amounts charged to customers as revenues and the related costs as an expense in "Cost of products sold" when control of the related products or services has transferred to the customer.
Description of New Adopted Accounting Pronouncements	Recent Accounting Pronouncements: New Accounting Guidance Adopted: Revenue recognition The new revenue standard introduces a five-step revenue recognition model in which an entity should recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The new revenue standard also requires disclosures sufficient to enable users to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers, including qualitative and quantitative disclosures about contracts with customers, significant judgments and changes in judgments and assets recognized from the costs to obtain or fulfill a contract. For further information about the Company's revenues from contracts with customers, refer to Note 11 - Revenue . On January 1, 2018, the Company adopted the new revenue standard and all of the related amendments using the modified retrospective method and applied those provisions to all open contracts. The Company recognized the cumulative effect of initially applying the new revenue standard as an adjustment to the opening balance of retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The cumulative effect of changes made to the balance sheet as of January 1, 2018 for the adoption of the new revenue standard was as follows: Balance at December 31, 2017 Effect of Accounting Change Balance at January 1, 2018 ASSETS Accounts receivable, less allowances $ 524.9 $ (67.3 ) $ 457.6 Unbilled receivables — 100.5 100.5 Inventories, net 738.9 (22.9 ) 716.0 Other current assets 81.2 3.0 84.2 Deferred income taxes 61.0 (2.6 ) 58.4 LIABILITIES Other current liabilities 160.7 3.0 163.7 EQUITY Earnings invested in the business 1,408.4 7.7 1,416.1 The tables below reflect changes to financial statement line items as a result of adopting the new revenue standard. The adoption of the new revenue standard did not have an impact on "Net cash used in operating activities" on the Consolidated Statement of Cash Flows for the nine months ended September 30, 2018 . Consolidated Statement of Income for the three months ended September 30, 2018 : Previous Accounting Method Effect of Accounting Change As Reported Net sales $ 875.6 $ 5.7 $ 881.3 Cost of products sold 623.2 4.8 628.0 Selling, general, and administrative expenses 141.3 0.7 142.0 Income before income taxes 97.1 0.2 97.3 Provision for income taxes 25.0 — 25.0 Net income 72.1 0.2 72.3 Net income attributable to The Timken Company $ 71.4 $ 0.2 $ 71.6 Basic earnings per share $ 0.93 $ — $ 0.93 Diluted earnings per share $ 0.91 $ — $ 0.91 Consolidated Statement of Income for the nine months ended September 30, 2018 : Previous Accounting Method Effect of Accounting Change As Reported Net sales $ 2,653.7 $ 17.0 $ 2,670.7 Cost of products sold 1,874.2 10.9 1,885.1 Selling, general, and administrative expenses 430.6 1.8 432.4 Income before income taxes 323.9 4.3 328.2 Provision for income taxes 82.5 1.0 83.5 Net income 241.4 3.3 244.7 Net income attributable to The Timken Company $ 239.5 $ 3.3 $ 242.8 Basic earnings per share $ 3.10 $ 0.04 $ 3.14 Diluted earnings per share $ 3.05 $ 0.04 $ 3.09 Consolidated Balance Sheet as of September 30, 2018 : Previous Accounting Method Effect of Accounting Change As Reported ASSETS Accounts receivable, less allowances $ 637.5 $ (88.9 ) $ 548.6 Unbilled receivables — 137.3 137.3 Inventories, net 874.8 (33.8 ) 841.0 Other current assets 72.5 3.5 76.0 Deferred income taxes 55.9 (3.6 ) 52.3 LIABILITIES Other current liabilities 169.2 3.5 172.7 EQUITY Earnings invested in the business 1,584.4 11.0 1,595.4 Pension and other postretirement benefits As mentioned above, the FASB issued ASU 2017-07, “Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” in March 2017. The Company adopted ASU 2017-07 on January 1, 2018 on a retrospective basis, which resulted in the reclassification of certain amounts from "Cost of products sold" and "Selling, general and administrative expenses" to "Other income (expense)" in the Consolidated Statement of Income. As a result, prior period amounts impacted have been revised accordingly. The following tables reflect the changes to financial statement line items resulting from the adoption of ASU 2017-07: For the three months ended September 30, 2017 : As Previously Reported Effect of Accounting Change As Adjusted Cost of products sold $ 554.4 $ 0.9 $ 555.3 Selling, general, and administrative expenses 134.0 — 134.0 Operating income 81.7 (0.9 ) 80.8 Other income, net 2.9 0.9 3.8 For the nine months ended September 30, 2017 : As Previously Reported Effect of Accounting Change As Adjusted Cost of products sold $ 1,626.5 $ (0.1 ) $ 1,626.4 Selling, general, and administrative expenses 377.4 (1.9 ) 375.5 Operating income 218.1 2.0 220.1 Other income (expense), net 9.1 (2.0 ) 7.1 For the year ended December 31, 2017 : As Previously Reported Effect of Accounting Change As Adjusted Cost of products sold $ 2,193.4 $ (1.7 ) $ 2,191.7 Selling, general, and administrative expenses 521.4 (13.1 ) 508.3 Operating income 284.7 14.8 299.5 Other income (expense), net 9.4 (14.8 ) (5.4 ) For the year ended December 31, 2016 : As Previously Reported Effect of Accounting Change As Adjusted Cost of products sold $ 2,001.3 $ (37.8 ) $ 1,963.5 Selling, general, and administrative expenses 470.7 (30.5 ) 440.2 Pension settlement charges 1.6 (1.6 ) — Operating income 174.5 69.9 244.4 Other expense, net (0.9 ) (69.9 ) (70.8 ) For the year ended December 31, 2015: As Previously Reported Effect of Accounting Change As Adjusted Cost of products sold $ 2,052.8 $ 15.7 $ 2,068.5 Selling, general, and administrative expenses 457.7 26.9 484.6 Pension settlement charges 119.9 (119.9 ) — Operating income 255.9 77.3 333.2 Other expense, net (7.5 ) (77.3 ) (84.8 ) Other new accounting guidance adopted In November 2016, the FASB issued ASU 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash.” ASU 2016-18 requires that a statement of cash flows explain the change in the total of cash, cash equivalents, and restricted cash during the period. On January 1, 2018, the Company adopted the provisions of ASU 2016-18 on a retrospective basis, which resulted in the addition of restricted cash balances and movements in the Company’s Statement of Cash Flows for all periods presented. As a result, for the nine months ended September 30, 2018 and 2017 , restricted cash balances of $ 1.3 million and $ 3.3 million , respectively, were included in the Company's ending balance on the Statement of Cash Flows. In February 2018, the FASB issued ASU 2018-02, "Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." ASU 2018-02 allows for certain tax effects resulting from the Tax Cuts and Jobs Act of 2017 (“U.S. Tax Reform”) to be reclassified from accumulated other comprehensive income (or loss) to retained earnings. This standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. Also, ASU 2018-02 may be applied in the period of adoption or retrospectively to each period in which the effect of the change in the statutory income tax rate in the U.S. Tax Reform is recognized. On January 1, 2018, the Company early adopted the provisions of ASU 2018-02, with the related impact applied in the period of adoption. In doing so, the Company elected to reclassify $0.7 million of related income tax effects from accumulated other comprehensive loss to retained earnings in the first quarter of 2018. New Accounting Guidance Issued and Not Yet Adopted: In August 2017, the FASB issued ASU 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities", which impacts both designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. ASU 2017-12 amends and clarifies the requirements to qualify for hedge accounting, removes the requirement to recognize changes in fair value from certain hedges in current earnings, and specifies the presentation of changes in fair value in the income statement for all hedging instruments. ASU 2017-12 is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, including in any interim period for which financial statements have not yet been issued, but the effect of adoption is required to be reflected as of the beginning of the fiscal year of adoption. The Company currently does not expect the adoption of ASU 2017-12 to materially impact the Company's results of operations and financial condition. In January 2017, the FASB issued ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.” Prior to the issuance of this new accounting guidance, entities first assessed qualitative factors to determine whether a two-step goodwill impairment test was necessary. When entities bypassed or failed the qualitative analysis, they were required to apply a two-step goodwill impairment test. Step 1 compared a reporting unit’s fair value to its carrying amount to determine if there is a potential impairment. If the carrying amount of a reporting unit exceeded its fair value, Step 2 was required to be completed. Step 2 involved determining the implied fair value of goodwill and comparing it to the carrying amount of that goodwill to measure the impairment loss, if any. ASU 2017-04 eliminates Step 2 of the current goodwill impairment test, and instead will require that a goodwill impairment loss be measured at the amount by which a reporting unit's carrying amount exceeds its fair value, not to exceed the carrying amount of goodwill. ASU 2017-04 is effective for public companies for years beginning after December 15, 2019, with early adoption permitted, and must be applied prospectively. The Company will adopt ASU 2017-04 on October 1, 2018 in conjunction with the Company's annual goodwill impairment test. The Company currently does not expect the adoption of ASU 2017-04 to materially impact the Company's results of operations and financial condition in the current year. In June 2016, the FASB issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." ASU 2016-13 changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The new guidance will replace the current incurred loss approach with an expected loss model. The new expected credit loss impairment model will apply to most financial assets measured at amortized cost and certain other instruments, including trade and other receivables, loans, held-to-maturity debt instruments, net investments in leases, loan commitments and standby letters of credit. Upon initial recognition of the exposure, the expected credit loss model requires entities to estimate the credit losses expected over the life of an exposure (or pool of exposures). The estimate of expected credit losses should consider historical information, current information and reasonable and supportable forecasts, including estimates of prepayments. Financial instruments with similar risk characteristics should be grouped together when estimating expected credit losses. ASU 2016-13 does not prescribe a specific method to make the estimate, so its application will require significant judgment. ASU 2016-13 is effective for public companies in fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is currently evaluating the effect that the adoption of ASU 2016-13 will have on the Company's results of operations and financial condition.
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]	Note 2 - Significant Accounting Policies The Company's significant accounting policies are detailed in "Note 1 - Significant Accounting Policies" of the Annual Report on Form 10-K for the year ended December 31, 2017. In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers (Topic 606)", which was adopted by the Company on January 1, 2018. Also, in March 2017, the FASB issued ASU 2017-07, “Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost", which was adopted by the Company on January 1, 2018. Significant changes to the Company's accounting policies as a result of adopting ASU 2014-09 (the “new revenue standard”) and ASU 2017-07 are discussed below: Revenue: A contract exists when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. Revenue is recognized when performance obligations under the terms of a contract with a customer of the Company are satisfied. A majority of the Company's revenue is from short-term, fixed-price contracts and continues to be recognized as of a point in time when products are shipped from the Company's manufacturing facilities or at a later point in time when control of the products transfers to the customer. Revenue was previously recognized for services and certain sales of customer-specific product at the point in time when the shipping terms were satisfied. Under the new revenue standard, the Company now recognizes revenue over time as it satisfies the performance obligations because of the continuous transfer of control to the customer, supported as follows: • For certain service contracts, this continuous transfer of control to the customer occurs as the Company's service enhances assets that the customer owns and controls at all times and the Company is contractually entitled to payment for work performed to date plus a reasonable margin. • For United States ("U.S.") government contracts, the customer is allowed to unilaterally terminate the contract for convenience, and is required to pay the Company for costs incurred plus a reasonable margin and can take control of any work in process. • For certain non-U.S. government contracts involving customer-specific products, the customer controls the work in process based on contractual termination clauses or restrictions on the Company's use of the product and the Company possesses a right to payment for work performed to date plus a reasonable margin. As a result of control transferring over time for these products and services, revenue is recognized based on progress toward completion of the performance obligation. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services to be provided. The Company has elected to use the cost-to-cost input measure of progress for these contracts because it best depicts the transfer of goods or services to the customer based on incurring costs on the contracts. Under the cost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Revenues are recorded proportionally as costs are incurred. The pricing and payment terms for non-U.S. government contracts is based on the Company's standard terms and conditions or the result of specific negotiations with each customer. The Company's standard terms and conditions require payment 30 days from the invoice date, but the timing of payment for specific negotiated terms may vary. The Company also has both prime and subcontracts in support of the provision of goods and services to the U.S. government. Certain of these contracts are subject to the Federal Acquisition Regulation ("FAR") and are priced commercially based on a competitive market. Under the payment terms of those U.S. government fixed-price contracts, the customer pays the Company performance-based payments, which are interim payments of up to 80% of the contract price for costs incurred to date based on quantifiable measures of performance or on the achievement of specified events or milestones. Because the customer retains a portion of the contract price until completion of such contracts, certain of these U.S. government fixed-price contracts result in revenue recognized in excess of billings, which is presented within "Unbilled Receivables" on the Consolidated Balance Sheet. The portion of the payments retained by the customer until final contract settlement is not considered a significant financing component because the intent is to protect the customer. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring goods or providing services. Sales, value add, and other taxes the Company collects concurrent with revenue-producing activities are excluded from revenue. As a practical expedient, the Company may exclude an assessment of whether promised goods or services are performance obligations, if they are immaterial in the context of the contract with the customer, and combine these with other performance obligations. The Company has elected to recognize incremental costs incurred to obtain contracts, which primarily represent commissions paid to third-party sales agents where the amortization period would be less than one year, as "Selling, general and administrative ("SG&A") expenses" in the Consolidated Statement of Income as incurred. The Company has also elected not to adjust the promised amount of consideration for the effects of any significant financing component where the Company expects, at contract inception, that the period between when the Company transfers a promised good or service to a customer and when the customer pays for that good or service will be one year or less. Finally, the Company's policy is to exclude performance obligations resulting from contracts with a duration of one year or less from its disclosures related to remaining performance obligations. The amount of consideration to which the Company expects to be entitled in exchange for the goods and services is not generally subject to significant variations. However, the Company does offer certain customers rebates, prompt payment discounts, end-user discounts, the right to return eligible products, and/or other forms of variable consideration. The Company estimates this variable consideration using the expected value amount, which is based on historical experience. The Company includes estimated amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. The Company adjusts the estimate of revenue at the earlier of when the amount of consideration the Company expects to receive changes or when the consideration becomes fixed. The Company recognizes the cost of freight and shipping when control of the products or services has transferred to the customer as an expense in "Cost of products sold" on the Consolidated Statement of Income, because those are costs incurred to fulfill the promise recognized, not a separate performance obligation. To the extent certain freight and shipping fees are charged to customers, the Company recognizes the amounts charged to customers as revenues and the related costs as an expense in "Cost of products sold" when control of the related products or services has transferred to the customer. Contracts are occasionally modified to account for changes in contract specifications, requirements, and pricing. The Company considers contract modifications to exist when the modification either creates new or changes the existing enforceable rights and obligations. Substantially all of the Company's contract modifications are for goods or services that are distinct from the existing contract. Therefore, the effect of a contract modification on the transaction price and the Company's measure of progress for the performance obligation to which it relates is generally recognized on a prospective basis. Accounts Receivable, Less Allowances: "Accounts receivable, less allowances" on the Consolidated Balance Sheet include amounts billed and currently due from customers. The amounts due are stated at their net estimated realizable value. The Company maintains an allowance for doubtful accounts, which represents an estimate of the losses expected from the accounts receivable portfolio, to reduce accounts receivable to their net realizable value. The allowance is based upon historical trends in collections and write-offs, management's judgment of the probability of collecting accounts and management's evaluation of business risk. The Company extends credit to customers satisfying pre-defined credit criteria. The Company believes it has limited concentration of credit risk due to the diversity of its customer base. Prior to the adoption of the new revenue standard, the Company recognized a portion of its revenues on the percentage-of-completion method measured on the cost-to-cost basis. As of December 31, 2017, revenue recognized in excess of billings of $67.3 million related to these revenues were included in "Accounts receivable, less allowances" on the Consolidated Balance Sheet. In accordance with the new revenue standard, $88.9 million of revenue recognized in excess of billings related to these revenues are included in "Unbilled receivables" on the Consolidated Balance Sheet at September 30, 2018 . Unbilled Receivables: "Unbilled receivables" on the Consolidated Balance Sheet primarily include unbilled amounts typically resulting from sales under long-term contracts when the cost-to-cost method of revenue recognition is utilized, the revenue recognized exceeds the amount billed to the customer and the right to payment is primarily just subject to the passage of time. Amounts may not exceed their net realizable value. Pension and Other Postretirement Benefits: With the adoption of ASU 2017-07 on January 1, 2018, service cost is included in other employee compensation costs within operating income and is the only component of net periodic benefit cost that may be capitalized when applicable. The other components of net periodic benefit cost are presented separately outside of operating income. Also, actuarial gains and losses are excluded from segment results, while all other components of net periodic benefit cost will continue to be included within segment results. Recent Accounting Pronouncements: New Accounting Guidance Adopted: Revenue recognition The new revenue standard introduces a five-step revenue recognition model in which an entity should recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The new revenue standard also requires disclosures sufficient to enable users to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers, including qualitative and quantitative disclosures about contracts with customers, significant judgments and changes in judgments and assets recognized from the costs to obtain or fulfill a contract. For further information about the Company's revenues from contracts with customers, refer to Note 11 - Revenue . On January 1, 2018, the Company adopted the new revenue standard and all of the related amendments using the modified retrospective method and applied those provisions to all open contracts. The Company recognized the cumulative effect of initially applying the new revenue standard as an adjustment to the opening balance of retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The cumulative effect of changes made to the balance sheet as of January 1, 2018 for the adoption of the new revenue standard was as follows: Balance at December 31, 2017 Effect of Accounting Change Balance at January 1, 2018 ASSETS Accounts receivable, less allowances $ 524.9 $ (67.3 ) $ 457.6 Unbilled receivables — 100.5 100.5 Inventories, net 738.9 (22.9 ) 716.0 Other current assets 81.2 3.0 84.2 Deferred income taxes 61.0 (2.6 ) 58.4 LIABILITIES Other current liabilities 160.7 3.0 163.7 EQUITY Earnings invested in the business 1,408.4 7.7 1,416.1 The tables below reflect changes to financial statement line items as a result of adopting the new revenue standard. The adoption of the new revenue standard did not have an impact on "Net cash used in operating activities" on the Consolidated Statement of Cash Flows for the nine months ended September 30, 2018 . Consolidated Statement of Income for the three months ended September 30, 2018 : Previous Accounting Method Effect of Accounting Change As Reported Net sales $ 875.6 $ 5.7 $ 881.3 Cost of products sold 623.2 4.8 628.0 Selling, general, and administrative expenses 141.3 0.7 142.0 Income before income taxes 97.1 0.2 97.3 Provision for income taxes 25.0 — 25.0 Net income 72.1 0.2 72.3 Net income attributable to The Timken Company $ 71.4 $ 0.2 $ 71.6 Basic earnings per share $ 0.93 $ — $ 0.93 Diluted earnings per share $ 0.91 $ — $ 0.91 Consolidated Statement of Income for the nine months ended September 30, 2018 : Previous Accounting Method Effect of Accounting Change As Reported Net sales $ 2,653.7 $ 17.0 $ 2,670.7 Cost of products sold 1,874.2 10.9 1,885.1 Selling, general, and administrative expenses 430.6 1.8 432.4 Income before income taxes 323.9 4.3 328.2 Provision for income taxes 82.5 1.0 83.5 Net income 241.4 3.3 244.7 Net income attributable to The Timken Company $ 239.5 $ 3.3 $ 242.8 Basic earnings per share $ 3.10 $ 0.04 $ 3.14 Diluted earnings per share $ 3.05 $ 0.04 $ 3.09 Consolidated Balance Sheet as of September 30, 2018 : Previous Accounting Method Effect of Accounting Change As Reported ASSETS Accounts receivable, less allowances $ 637.5 $ (88.9 ) $ 548.6 Unbilled receivables — 137.3 137.3 Inventories, net 874.8 (33.8 ) 841.0 Other current assets 72.5 3.5 76.0 Deferred income taxes 55.9 (3.6 ) 52.3 LIABILITIES Other current liabilities 169.2 3.5 172.7 EQUITY Earnings invested in the business 1,584.4 11.0 1,595.4 Pension and other postretirement benefits As mentioned above, the FASB issued ASU 2017-07, “Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” in March 2017. The Company adopted ASU 2017-07 on January 1, 2018 on a retrospective basis, which resulted in the reclassification of certain amounts from "Cost of products sold" and "Selling, general and administrative expenses" to "Other income (expense)" in the Consolidated Statement of Income. As a result, prior period amounts impacted have been revised accordingly. The following tables reflect the changes to financial statement line items resulting from the adoption of ASU 2017-07: For the three months ended September 30, 2017 : As Previously Reported Effect of Accounting Change As Adjusted Cost of products sold $ 554.4 $ 0.9 $ 555.3 Selling, general, and administrative expenses 134.0 — 134.0 Operating income 81.7 (0.9 ) 80.8 Other income, net 2.9 0.9 3.8 For the nine months ended September 30, 2017 : As Previously Reported Effect of Accounting Change As Adjusted Cost of products sold $ 1,626.5 $ (0.1 ) $ 1,626.4 Selling, general, and administrative expenses 377.4 (1.9 ) 375.5 Operating income 218.1 2.0 220.1 Other income (expense), net 9.1 (2.0 ) 7.1 For the year ended December 31, 2017 : As Previously Reported Effect of Accounting Change As Adjusted Cost of products sold $ 2,193.4 $ (1.7 ) $ 2,191.7 Selling, general, and administrative expenses 521.4 (13.1 ) 508.3 Operating income 284.7 14.8 299.5 Other income (expense), net 9.4 (14.8 ) (5.4 ) For the year ended December 31, 2016 : As Previously Reported Effect of Accounting Change As Adjusted Cost of products sold $ 2,001.3 $ (37.8 ) $ 1,963.5 Selling, general, and administrative expenses 470.7 (30.5 ) 440.2 Pension settlement charges 1.6 (1.6 ) — Operating income 174.5 69.9 244.4 Other expense, net (0.9 ) (69.9 ) (70.8 ) For the year ended December 31, 2015: As Previously Reported Effect of Accounting Change As Adjusted Cost of products sold $ 2,052.8 $ 15.7 $ 2,068.5 Selling, general, and administrative expenses 457.7 26.9 484.6 Pension settlement charges 119.9 (119.9 ) — Operating income 255.9 77.3 333.2 Other expense, net (7.5 ) (77.3 ) (84.8 ) Other new accounting guidance adopted In November 2016, the FASB issued ASU 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash.” ASU 2016-18 requires that a statement of cash flows explain the change in the total of cash, cash equivalents, and restricted cash during the period. On January 1, 2018, the Company adopted the provisions of ASU 2016-18 on a retrospective basis, which resulted in the addition of restricted cash balances and movements in the Company’s Statement of Cash Flows for all periods presented. As a result, for the nine months ended September 30, 2018 and 2017 , restricted cash balances of $ 1.3 million and $ 3.3 million , respectively, were included in the Company's ending balance on the Statement of Cash Flows. In February 2018, the FASB issued ASU 2018-02, "Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." ASU 2018-02 allows for certain tax effects resulting from the Tax Cuts and Jobs Act of 2017 (“U.S. Tax Reform”) to be reclassified from accumulated other comprehensive income (or loss) to retained earnings. This standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. Also, ASU 2018-02 may be applied in the period of adoption or retrospectively to each period in which the effect of the change in the statutory income tax rate in the U.S. Tax Reform is recognized. On January 1, 2018, the Company early adopted the provisions of ASU 2018-02, with the related impact applied in the period of adoption. In doing so, the Company elected to reclassify $0.7 million of related income tax effects from accumulated other comprehensive loss to retained earnings in the first quarter of 2018. New Accounting Guidance Issued and Not Yet Adopted: In August 2017, the FASB issued ASU 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities", which impacts both designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. ASU 2017-12 amends and clarifies the requirements to qualify for hedge accounting, removes the requirement to recognize changes in fair value from certain hedges in current earnings, and specifies the presentation of changes in fair value in the income statement for all hedging instruments. ASU 2017-12 is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, including in any interim period for which financial statements have not yet been issued, but the effect of adoption is required to be reflected as of the beginning of the fiscal year of adoption. The Company currently does not expect the adoption of ASU 2017-12 to materially impact the Company's results of operations and financial condition. In January 2017, the FASB issued ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.” Prior to the issuance of this new accounting guidance, entities first assessed qualitative factors to determine whether a two-step goodwill impairment test was necessary. When entities bypassed or failed the qualitative analysis, they were required to apply a two-step goodwill impairment test. Step 1 compared a reporting unit’s fair value to its carrying amount to determine if there is a potential impairment. If the carrying amount of a reporting unit exceeded its fair value, Step 2 was required to be completed. Step 2 involved determining the implied fair value of goodwill and comparing it to the carrying amount of that goodwill to measure the impairment loss, if any. ASU 2017-04 eliminates Step 2 of the current goodwill impairment test, and instead will require that a goodwill impairment loss be measured at the amount by which a reporting unit's carrying amount exceeds its fair value, not to exceed the carrying amount of goodwill. ASU 2017-04 is effective for public companies for years beginning after December 15, 2019, with early adoption permitted, and must be applied prospectively. The Company will adopt ASU 2017-04 on October 1, 2018 in conjunction with the Company's annual goodwill impairment test. The Company currently does not expect the adoption of ASU 2017-04 to materially impact the Company's results of operations and financial condition in the current year. In June 2016, the FASB issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." ASU 2016-13 changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The new guidance will replace the current incurred loss approach with an expected loss model. The new expected credit loss impairment model will apply to most financial assets measured at amortized cost and certain other instruments, including trade and other receivables, loans, held-to-maturity debt instruments, net investments in leases, loan commitments and standby letters of credit. Upon initial recognition of the exposure, the expected credit loss model requires entities to estimate the credit losses expected over the life of an exposure (or pool of exposures). The estimate of expected credit losses should consider historical information, current information and reasonable and supportable forecasts, including estimates of prepayments. Financial instruments with similar risk characteristics should be grouped together when estimating expected credit losses. ASU 2016-13 does not prescribe a specific method to make the estimate, so its application will require significant judgment. ASU 2016-13 is effective for public companies in fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is currently evaluating the effect that the adoption of ASU 2016-13 will have on the Company's results of operations and financial condition. In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)." ASU 2016-02 was issued to increase transparency and comparability among entities by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about lease arrangements. ASU 2016-02 is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company plans to adopt the new standard on January 1, 2019 using the cumulative-effect adjustment transition method and has created a cross-functional implementation team to identify all leases involved, determine which, if any, practical expedients to utilize, and perform all data gathering required. Additionally, the Company is continuing to advance in implementing an enterprise-wide lease management system to assist in the related accounting and is evaluating additional changes to the related processes and internal controls to ensure requirements are met for reporting and disclosure purposes. While the assessment of the impact this new standard will have on the consolidated financial statements is ongoing, the Company expects to recognize a material right-to-use asset and lease liability for its operating lease commitments on the Consolidated Balance Sheet, but does not expect the new standard to have a material impact on its consolidated results of operations or cash flows.

Acquisitions (Notes)

Acquisitions (Notes)	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	Note 3 - Acquisitions and Divestitures The Company completed three acquisitions in 2018 . On September 18, 2018 , the Company completed the acquisition of Rollon S.p.A. ("Rollon"), a leader in engineered linear motion products, specializing in the design and manufacture of linear guides, telescopic rails and linear actuators used in a wide range of industries such as passenger rail, aerospace, packaging and logistics, medical and automation. On September 1, 2018 , the Company completed the acquisition of Apiary Investments Holdings Limited ("Cone Drive"), a leader in precision drives used in diverse markets including solar, automation, aerial platforms, and food and beverage. On August 30, 2018 , the Company's majority-owned subsidiary, Timken India Limited ("Timken India"), completed the acquisition of ABC Bearings Limited ("ABC Bearings"). Timken India issued its shares as consideration for the acquisition of ABC Bearings. R efer to Note 8 - Equity for more information on the acquisition of ABC Bearings. ABC Bearings is a manufacturer of tapered, cylindrical and spherical roller bearings and slewing rings in India. Expected aggregate annual sales for these companies is approximately $270 million . The total p urchase price for these acquisitions, net of cash acquired of $30.1 million , was $831.4 million . The Company i ncurred acquisition-related costs of $7.3 million to complete these acquisitions. The 2018 acquisitions are subject to post-closing purchase price allocation adjustments. Based on markets and customers served, substantially all of the results for Rollon and Cone Drive are reported in the Process Industries segment and substantially all of the results for ABC Bearings are reported in the Mobile Industries segment. The following table presents the preliminary purchase price allocation at fair value related to the 2018 acquisitions at the date of acquisition: Preliminary Purchase Assets: Accounts receivable, net $ 43.3 Inventories, net 58.3 Other current assets 7.2 Property, plant and equipment, net 68.3 Goodwill 468.2 Other intangible assets 366.0 Other non-current assets 18.8 Total assets acquired $ 1,030.1 Liabilities: Accounts payable, trade $ 34.5 Salaries, wages and benefits 9.2 Income taxes payable 1.6 Other current liabilities 9.2 Short-term debt 1.8 Long-term debt 1.7 Accrued pension cost 7.0 Accrued postretirement benefits cost 11.8 Deferred income taxes 113.0 Other non-current liabilities 8.9 Total liabilities assumed $ 198.7 Net assets acquired $ 831.4 The following table summarizes the preliminary purchase price allocation for identifiable intangible assets acquired in 2018 : Preliminary Purchase Weighted - Trade names (indefinite life) $ 47.4 Indefinite Trade names (finite life) 1.8 15 years Technology and know-how 127.2 17 years Customer relationships 189.6 19 years Total intangible assets $ 366.0 The Company completed three acquisitions in 2017. On July 3, 2017 , the Company completed the acquisition of Groeneveld Group ("Groeneveld"), a leading provider of automatic lubrication solutions used in on- and off-highway applications. On May 5, 2017 , the Company completed the acquisition of the assets of PT Tech, Inc. ("PT Tech"), a manufacturer of engineered clutches, brakes, hydraulic power take-off units and other torque management devices used in the mining, aggregate, wood recycling and metals industries. On April 3, 2017 , the Company completed the acquisition of Torsion Control Products, Inc. ("Torsion Control Products"), a manufacturer of engineered torsional couplings used in the construction, agriculture and mining industries. Certain measurement period adjustments were recorded in 2018, resulting in a $3.2 million reduction to Goodwill. The following table presents the purchase price allocation for the 2017 acquisitions: Preliminary Purchase Price Allocation Adjustment Purchase Price Allocation Assets: Accounts receivable, net $ 27.6 $ 27.6 Inventories, net 29.4 29.4 Other current assets 3.3 $ 2.7 6.0 Property, plant and equipment, net 31.5 31.5 Goodwill 149.7 (3.2 ) 146.5 Other intangible assets 173.6 173.6 Other non-current assets 1.8 1.8 Total assets acquired $ 416.9 $ (0.5 ) $ 416.4 Liabilities: Accounts payable, trade $ 9.5 $ 9.5 Salaries, wages and benefits 5.8 5.8 Other current liabilities 8.6 $ (0.1 ) 8.5 Short-term debt 0.1 0.1 Long-term debt 2.9 2.9 Deferred income taxes 42.2 (0.7 ) 41.5 Other non-current liabilities 1.0 0.3 1.3 Total liabilities assumed $ 70.1 $ (0.5 ) $ 69.6 Net assets acquired $ 346.8 $ — $ 346.8 Divestiture: On September 19, 2018, the Company completed the sale of Groeneveld Information Technology Holding B.V. (the "ICT Business"), located in Gorinchem, Netherlands. The Company acquired the business in July 2017 as part of the Groeneveld acquisition. The ICT Business is separate from the Groeneveld lubrications solutions business and had sales of approximately $15 million

Inventories

Inventories	9 Months Ended
	Sep. 30, 2018
Inventory Disclosure [Abstract]
Inventories	Note 4 - Inventories The components of inventories at September 30, 2018 and December 31, 2017 were as follows: September 30, December 31, Manufacturing supplies $ 32.1 $ 29.0 Raw materials 109.2 90.4 Work in process 290.6 245.2 Finished products 454.2 404.3 Subtotal 886.1 768.9 Allowance for obsolete and surplus inventory (45.1 ) (30.0 ) Total Inventories, net $ 841.0 $ 738.9 Inventories are valued at net realizable value, with approximately 56% valued by the first-in, first-out ("FIFO") method and the remaining 44% valued by the last-in, first-out ("LIFO") method. The majority of the Company's domestic inventories are valued by the LIFO method and all of the Company's international inventories are valued by the FIFO method. The LIFO reserves at September 30, 2018 and December 31, 2017 were $172.4 million and $167.6 million

Property, Plant and Equipment

Property, Plant and Equipment	9 Months Ended
	Sep. 30, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;color:#000000;font-style:italic;text-decoration:none;">Note - Property, Plant and Equipment</font><font style="font-family:Arial;font-size:10pt;font-style:italic;"> </font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">The components of property, plant and equipment at </font><font style="font-family:Arial;font-size:10pt;">September 30, 2018</font><font style="font-family:Arial;font-size:10pt;"> and </font><font style="font-family:Arial;font-size:10pt;">December 31, 2017</font><font style="font-family:Arial;font-size:10pt;"> were as follows:</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="7" rowspan="1"></td></tr><tr><td style="width:72%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:12%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:12%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;font-weight:bold;">September 30, <br clear="none"/>2018</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;">December 31, <br clear="none"/>2017</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Land and buildings</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">482.1</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">483.0</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Machinery and equipment</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">1,966.1</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">1,922.6</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Subtotal</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">2,448.2</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">2,405.6</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Accumulated depreciation</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">(1,561.4</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">)</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">(1,541.4</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">)</font></div></td></tr><tr><td style="vertical-align:top;border-bottom:2px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Property, plant and equipment, net</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">$</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">886.8</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">864.2</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Total depreciation expense for the </font><font style="font-family:Arial;font-size:10pt;color:#000000;text-decoration:none;">nine</font><font style="font-family:Arial;font-size:10pt;"> months ended </font><font style="font-family:Arial;font-size:10pt;color:#000000;text-decoration:none;">September 30, 2018</font><font style="font-family:Arial;font-size:10pt;"> and </font><font style="font-family:Arial;font-size:10pt;color:#000000;text-decoration:none;">2017</font><font style="font-family:Arial;font-size:10pt;"> was </font><font style="font-family:Arial;font-size:10pt;">$97.7 million</font><font style="font-family:Arial;font-size:10pt;"> and </font><font style="font-family:Arial;font-size:10pt;color:#000000;text-decoration:none;">$95.5 million</font><font style="font-family:Arial;font-size:10pt;">, respectively.</font></div></div>

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Note 5 - Goodwill and Other Intangible Assets The changes in the carrying amount of goodwill for the nine months ended September 30, 2018 were as follows: Mobile Industries Process Industries Total Beginning balance $ 254.3 $ 257.5 $ 511.8 Acquisitions 16.2 448.8 465.0 Divestiture (5.1 ) — (5.1 ) Foreign currency translation adjustments and other changes (6.2 ) (0.1 ) (6.3 ) Ending balance $ 259.2 $ 706.2 $ 965.4 The $16.2 million addition from acquisitions for the Mobile Industries segment resulted primarily from the ABC Bearings acquisition goodwill of $19.4 million , partially offset by certain measurement period adjustments of $3.2 million recorded in 2018 for the 2017 acquisitions. In addition, goodwill for the Mobile Industries segment was reduced by $5.1 million as a result of the divestiture of the ICT Business. The Cone Drive and Rollon acquisitions added $448.8 million of goodwill to the Process Industries segment. The Company does not expect the goodwill from the 2018 acquisitions to be tax deductible, but it is still evaluating the tax deductibility of goodwill from the ABC Bearings acquisition. Refer to Note 3 - Acquisitions and Divestitures for further information. The following table displays intangible assets as of September 30, 2018 and December 31, 2017 : Balance at September 30, 2018 Balance at December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Intangible assets subject to amortization: Customer relationships $ 503.3 $ 119.1 $ 384.2 $ 324.6 $ 103.0 $ 221.6 Technology and know-how 254.0 39.3 214.7 128.7 33.8 94.9 Trade names 9.5 4.7 4.8 8.6 4.3 4.3 Capitalized software 262.8 233.9 28.9 261.5 226.5 35.0 Other 9.6 5.9 3.7 10.3 6.2 4.1 $ 1,039.2 $ 402.9 $ 636.3 $ 733.7 $ 373.8 $ 359.9 Intangible assets not subject to amortization: Trade names $ 98.1 $ 98.1 $ 52.0 $ 52.0 FAA air agency certificates 8.7 8.7 8.7 8.7 $ 106.8 $ 106.8 $ 60.7 $ 60.7 Total intangible assets $ 1,146.0 $ 402.9 $ 743.1 $ 794.4 $ 373.8 $ 420.6 Amortization expense for intangible assets was $32.4 million and $29.2 million for the nine months ended September 30, 2018 and 2017 , respectively. Amortization expense for intangible assets is projected to be $44.5 million in 2018 ; $51.9 million in 2019 ; $47.7 million in 2020 ; $44.2 million in 2021 ; and $40.1 million in 2022

Contingencies (Notes)

Contingencies (Notes)	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Note 7 - Contingencies The Company and certain of its subsidiaries have been identified as potentially responsible parties for investigation and remediation under the Comprehensive Environmental Response, Compensation and Liability Act ("CERCLA"), known as the Superfund, or similar state laws with respect to certain sites. Claims for investigation and remediation have been asserted against numerous other entities, which are believed to be financially solvent and are expected to fulfill their proportionate share of the obligation. On December 28, 2004, the United States Environmental Protection Agency (“USEPA”) sent Lovejoy, Inc. ("Lovejoy") a Special Notice Letter that identified Lovejoy as a potentially responsible party, together with at least 14 other companies, at the Ellsworth Industrial Park Site, Downers Grove, DuPage County, Illinois (the “Site”). The Company acquired Lovejoy in 2016. Lovejoy’s Downers Grove property is situated within the Ellsworth Industrial Complex. The USEPA and the Illinois Environmental Protection Agency (“IEPA”) allege there have been one or more releases or threatened releases of hazardous substances, allegedly including, but not limited to, a release or threatened release on or from Lovejoy's property, at the Site. The relief sought by the USEPA and IEPA includes further investigation and potential remediation of the Site and reimbursement of response costs. Lovejoy’s allocated share of past and future costs related to the Site, including for investigation and/or remediation, could be significant. All previously pending property damage and personal injury lawsuits against Lovejoy related to the Site have been settled or dismissed. The Company had total environmental accruals of $5.6 million and $ 5.0 million for various known environmental matters that are probable and reasonably estimable as of September 30, 2018 and December 31, 2017 , respectively, which includes the Lovejoy matter discussed above. These accruals were recorded based upon the best estimate of costs to be incurred in light of the progress made in determining the magnitude of remediation costs, 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. In addition, the Company is subject to various lawsuits, claims and proceedings, which arise in the ordinary course of its business. The Company accrues costs associated with legal and non-income tax matters when they become probable and reasonably estimable. Accruals are established based on the estimated undiscounted cash flows to settle the obligations and are not reduced by any potential recoveries from insurance or other indemnification claims. Management believes that any ultimate liability with respect to these actions, in excess of amounts provided, will not materially affect the Company’s Consolidated Financial Statements. In October 2014, the Brazilian government antitrust agency announced that it had opened an investigation of alleged antitrust violations in the bearing industry. The Company’s Brazilian subsidiary, Timken do Brasil Comercial Importadora Ltda, was included in the investigation. While the Company is unable to predict the ultimate length, scope or results of the investigation, management believes that the outcome will not have a material effect on the Company’s consolidated financial position. However, any such outcome may be material to the results of operations of any particular period in which costs, if any, are recognized. Based on current facts and circumstances, the low end of the range for potential penalties, if any, would be immaterial to the Company. Product Warranties: In addition to the contingencies above, the Company provides limited warranties on certain of its products. The following table is a rollforward of the warranty liability for the nine months ended September 30, 2018 and the twelve months ended December 31, 2017 : September 30, December 31, Beginning balance, January 1 $ 5.8 $ 6.9 Additions 3.3 2.7 Payments (1.6 ) (3.8 ) Ending balance $ 7.5 $ 5.8 The product warranty liability at September 30, 2018 and December 31, 2017 was included in "Other current liabilities" on the Consolidated Balance Sheets.

Financing Arrangements

Financing Arrangements	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Financing Arrangements	Short-term debt at September 30, 2018 and December 31, 2017 was as follows: September 30, December 31, Variable-rate Accounts Receivable Facility with an interest rate of 2.15% at December 31, 2017 $ — $ 62.9 Borrowings under variable-rate lines of credit for certain of the Company’s foreign subsidiaries with various banks with interest rates ranging from 0.33% to 9.45% at September 30, 2018 and 0.32% to 2.22% at December 31, 2017 37.0 42.5 Short-term debt $ 37.0 $ 105.4 On September 28, 2018, the Company extended the maturity date of its $100 million Amended and Restated Asset Securitization Agreement (the "Accounts Receivable Facility") to November 30, 2021 . Under the terms of the Accounts Receivable Facility, 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 that are funded through a vehicle that issues commercial paper in the short-term market. Borrowings under the Accounts Receivable Facility may be limited by certain borrowing base limitations; however, the Accounts Receivable Facility was not reduced by any such borrowing base limitations at September 30, 2018 . As of September 30, 2018 , there were outstanding borrowings of $93.2 million under the Accounts Receivable Facility, which reduced the availability under this facility to $6.8 million . The cost of this facility, which is the prevailing commercial paper rate plus facility fees, is considered a financing cost and is included in "Interest expense" in the Consolidated Statements of Income. The lines of credit for certain of the Company’s foreign subsidiaries provide for short-term borrowings up to $284.5 million in the aggregate. Most of these lines of credit are uncommitted. At September 30, 2018 , the Company’s foreign subsidiaries had borrowings outstanding of $37.0 million and bank guarantees of $0.5 million , which reduced the aggregate availability under these facilities to $247.0 million . Long-term debt at September 30, 2018 and December 31, 2017 was as follows: September 30, December 31, Fixed-rate Medium-Term Notes, Series A (1) , maturing at various dates through May 2028, with interest rates ranging from 6.74% to 7.76% $ 154.6 $ 154.5 Fixed-rate Senior Unsecured Notes (1) , maturing on September 1, 2024, with an interest rate of 3.875% 347.5 346.9 Variable-rate Senior Credit Facility with a weighted-average interest rate of 2.43% at September 30, 2018 and 1.83% at December 31, 2017 65.2 52.0 Variable-rate Accounts Receivable Facility with an interest rate of 3.05% at September 30, 2018 93.2 — Fixed-rate Euro Senior Unsecured Notes (1) , maturing on September 7, 2027, with an interest rate of 2.02% 173.4 179.3 Variable-rate Euro Term Loan (1) with an interest rate of 1.13% at September 30, 2018 and December 31, 2017 108.3 119.7 Fixed-rate Senior Unsecured Notes (1) , maturing on December 15, 2028, with an interest rate of 4.50% 396.0 — Variable-rate Term Loan (1) with an interest rate of 3.38% at September 30, 2018 349.2 — Other 5.7 4.5 1,693.1 856.9 Less: Current maturities 11.4 2.7 Long-term debt $ 1,681.7 $ 854.2 (1) Net of discounts and fees The Company has a $500 million Amended and Restated Credit Agreement ("Senior Credit Facility"), which matures on June 19, 2020 . At September 30, 2018 , the Company had $65.2 million of outstanding borrowings under the Senior Credit Facility, which reduced the availability under this facility to $434.8 million . The Senior Credit Facility has two financial covenants: a consolidated leverage ratio and a consolidated interest coverage ratio. At September 30, 2018 , the Company was in full compliance with both of these covenants. On September 6, 2018 , the Company issued $400 million aggregate principal amount of fixed-rate 4.50% senior unsecured notes that mature on December 15, 2028 (the "2028 Notes"). On September 11, 2018 , the Company entered into a $350 million variable-rate term loan that matures on September 11, 2023 (the "2023 Term Loan"). Proceeds from the 2028 Notes and the 2023 Term Loan were used to fund the acquisitions of Cone Drive and Rollon, which closed on September 1, 2018 and September 18, 2018 , respectively. On September 7, 2017 , the Company issued €150 million aggregate principal amount of fixed-rate 2.02% senior unsecured notes that mature on September 7, 2027 (the "2027 Notes"). On September 18, 2017 , the Company entered into a €100 million variable-rate term loan that matures on September 18, 2020 (the "2020 Term Loan"). On June 14, 2018, the Company repaid €6.5 million under the 2020 Term Loan, reducing the principal balance to €93.5 million as of September 30, 2018 . Proceeds from the 2027 Notes and the 2020 Term Loan were used to repay amounts drawn from the Senior Credit Facility to fund the acquisition of Groeneveld, which closed on July 3, 2017 . All of these debt instruments, except the 2028 Notes, have two financial covenants: a consolidated leverage ratio and a consolidated interest coverage ratio. These covenants are similar to those in the Senior Credit Facility. At September 30, 2018

Equity

Equity	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Equity	Note 8 - Equity The changes in the components of equity for the nine months ended September 30, 2018 were as follows: The Timken Company Shareholders Total Stated Capital Other Paid-In Capital Earnings Invested in the Business Accumulated Other Comprehensive (Loss) Treasury Stock Non- controlling Interest Balance at December 31, 2017 $ 1,474.9 $ 53.1 $ 903.8 $ 1,408.4 $ (38.3 ) $ (884.3 ) $ 32.2 Cumulative effect of the new revenue standard 7.7 7.7 Cumulative effect of ASU 2018-02 — 0.7 (0.7 ) Net income 244.7 242.8 1.9 Foreign currency translation adjustment (62.5 ) (53.8 ) (8.7 ) Change in fair value of derivative financial 4.0 4.0 Shares issued for the acquisition of ABC 66.0 30.9 35.1 Dividends – $0.83 per share (64.2 ) (64.2 ) Stock-based compensation 25.5 25.5 Stock purchased at fair market value (63.0 ) (63.0 ) Stock option exercise activity 12.7 (3.7 ) 16.4 Restricted share activity — (11.4 ) 11.4 Shares surrendered for taxes (5.4 ) (5.4 ) Balance at September 30, 2018 $ 1,640.4 $ 53.1 $ 945.1 $ 1,595.4 $ (88.8 ) $ (924.9 ) $ 60.5 On August 30, 2018, the Company's majority-owned subsidiary, Timken India, issued 7.2 million shares to complete the acquisition of ABC Bearings. The fair value of the shares issued was $66.0 million . The issuance of shares diluted the Company's controlling interest in Timken India from 75% to 67.8% . Refer to Note 3 - Acquisitions and Divestitures

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2018
Statement of Financial Position [Abstract]
accumulated other comprehensive income components reclassification	Note 9 - Accumulated Other Comprehensive Income (Loss) The following tables present details about components of accumulated other comprehensive loss for the three and nine months ended September 30, 2018 and 2017 , respectively: Foreign currency translation adjustments Pension and postretirement liability adjustments Change in fair value of derivative financial instruments Total Balance at June 30, 2018 $ (70.4 ) $ (0.4 ) $ 0.9 $ (69.9 ) Other comprehensive (loss) income before (24.2 ) — 1.0 (23.2 ) Amounts reclassified from accumulated other — — (1.5 ) (1.5 ) Income tax expense — — 0.1 0.1 Net current period other comprehensive loss, net of income taxes (24.2 ) — (0.4 ) (24.6 ) Noncontrolling interest 5.7 — — 5.7 Net current period comprehensive loss, net (18.5 ) — (0.4 ) (18.9 ) Balance at September 30, 2018 $ (88.9 ) $ (0.4 ) $ 0.5 $ (88.8 ) Foreign currency translation adjustments Pension and postretirement liability adjustments Change in fair value of derivative financial instruments Total Balance at December 31, 2017 $ (35.1 ) $ (0.3 ) $ (2.9 ) $ (38.3 ) Cumulative effect of ASU 2018-02 — (0.1 ) (0.6 ) (0.7 ) Balance at January 1, 2018 (35.1 ) (0.4 ) (3.5 ) (39.0 ) Other comprehensive (loss) income before (62.5 ) — 5.0 (57.5 ) Amounts reclassified from accumulated other — — 0.3 0.3 Income tax benefit — — (1.3 ) (1.3 ) Net current period other comprehensive (loss) (62.5 ) — 4.0 (58.5 ) Noncontrolling interest 8.7 — — 8.7 Net current period comprehensive (loss) income, net of income taxes, noncontrolling interest and cumulative effect of accounting change (53.8 ) (0.1 ) 3.4 (50.5 ) Balance at September 30, 2018 $ (88.9 ) $ (0.4 ) $ 0.5 $ (88.8 ) Foreign currency translation adjustments Pension and postretirement liability adjustments Change in fair value of derivative financial instruments Total Balance at June 30, 2017 $ (49.9 ) $ 1.6 $ (1.8 ) $ (50.1 ) Other comprehensive income (loss) before 10.9 — (4.0 ) 6.9 Amounts reclassified from accumulated other — 0.1 0.9 1.0 Income tax expense — — 1.1 1.1 Net current period other comprehensive 10.9 0.1 (2.0 ) 9.0 Noncontrolling interest 0.1 — — 0.1 Net current period comprehensive income (loss), net 11.0 0.1 (2.0 ) 9.1 Balance at September 30, 2017 $ (38.9 ) $ 1.7 $ (3.8 ) $ (41.0 ) Foreign currency translation adjustments Pension and postretirement liability adjustments Change in fair value of derivative financial instruments Total Balance at December 31, 2016 $ (79.8 ) $ 1.5 $ 0.4 $ (77.9 ) Other comprehensive income (loss) before 42.8 — (7.1 ) 35.7 Amounts reclassified from accumulated other — 0.3 0.4 0.7 Income tax expense (benefit) — (0.1 ) 2.5 2.4 Net current period other comprehensive 42.8 0.2 (4.2 ) 38.8 Noncontrolling interest (1.9 ) — — (1.9 ) Net current period comprehensive income (loss), net of income taxes and noncontrolling interest 40.9 0.2 (4.2 ) 36.9 Balance at September 30, 2017 $ (38.9 ) $ 1.7 $ (3.8 ) $ (41.0 )

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
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 and nine months ended September 30, 2018 and 2017 , respectively: Three Months Ended Nine Months Ended 2018 2017 2018 2017 Numerator: Net income attributable to The Timken Company $ 71.6 $ 53.5 $ 242.8 $ 174.2 Less: undistributed earnings allocated to nonvested stock — — — — Net income available to common shareholders for basic and diluted earnings per share $ 71.6 $ 53.5 $ 242.8 $ 174.2 Denominator: Weighted average number of shares outstanding - basic 76,903,395 77,694,974 77,332,209 77,766,828 Effect of dilutive securities: Stock options and awards - based on the treasury stock method 1,524,710 1,109,322 1,313,294 1,123,102 Weighted average number of shares outstanding, assuming dilution of stock options and awards 78,428,105 78,804,296 78,645,503 78,889,930 Basic earnings per share $ 0.93 $ 0.69 $ 3.14 $ 2.24 Diluted earnings per share $ 0.91 $ 0.68 $ 3.09 $ 2.21 The exercise prices for certain stock options that the Company has awarded exceeded the average market price of the Company’s common shares during each period presented. 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, 2018 and 2017 were 923,588 and 473,694 , respectively. During the nine months ended September 30, 2018 and 2017 , the antidilutive stock options outstanding were 852,318 and 529,020

Revenue (Notes)

Revenue (Notes)	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Note 11 - Revenue The following table presents details deemed most relevant to the users of the financial statements about total revenue for the three and nine months ended September 30, 2018 and 2017 , respectively: Three Months Ended Three Months Ended September 30, 2018 September 30, 2017 Mobile Process Total Mobile (1) Process (1) Total (1) United States $ 255.3 $ 192.9 $ 448.2 $ 231.6 $ 163.0 $ 394.6 Americas excluding United States 51.6 42.9 94.5 48.1 37.5 85.6 Europe / Middle East / Africa 89.3 86.0 175.3 84.2 70.7 154.9 Asia-Pacific 68.0 95.3 163.3 58.9 77.4 136.3 Net sales $ 464.2 $ 417.1 $ 881.3 $ 422.8 $ 348.6 $ 771.4 Nine Months Ended Nine Months Ended September 30, 2018 September 30, 2017 Mobile Process Total Mobile (1) Process (1) Total (1) United States $ 774.4 $ 561.5 $ 1,335.9 $ 707.2 $ 490.0 $ 1,197.2 Americas excluding United States 160.3 132.0 292.3 133.3 110.0 243.3 Europe / Middle East / Africa 292.5 266.4 558.9 213.8 196.7 410.5 Asia-Pacific 214.6 269.0 483.6 159.9 214.9 374.8 Net sales $ 1,441.8 $ 1,228.9 $ 2,670.7 $ 1,214.2 $ 1,011.6 $ 2,225.8 (1) Prior period amounts have not been adjusted under the modified retrospective adoption method. When reviewing revenues by sales channel, the Company separates net sales to original equipment manufacturers from sales to distributors and end users. The following table presents the percent of revenues by sales channel for the nine months ended September 30, 2018 : Nine Months Ended Revenue by sales channel September 30, 2018 Original equipment manufacturers 58% Distribution/end users 42% In addition to disaggregating revenue by segment and geography and by sales channel as shown above, the Company believes information about the timing of transfer of goods or services, type of customer and distinguishing service revenue from product sales is also relevant. During the nine months ended September 30, 2018 , approximately 9% of total net sales were recognized on an over-time basis because of the continuous transfer of control to the customer, with the remainder recognized as of a point in time. The payment terms with the U.S. government or its contractors, which represented approximately 7% of total net sales, differ from those of non-government customers. Finally, approximately 2% of total net sales represented service revenue. Remaining Performance Obligations: Remaining performance obligations represent the transaction price of orders meeting the definition of a contract in the new revenue standard for which work has not been performed and excludes unexercised contract options. Performance obligations having a duration of more than one year are concentrated in contracts for certain products and services provided to the U.S. government or its contractors. The aggregate amount of the transaction price allocated to remaining performance obligations for such contracts with a duration of more than one year was approximately $146 million at September 30, 2018 . Unbilled Receivables: The following table contains a rollforward of unbilled receivables for the nine months ended September 30, 2018 : September 30, Beginning balance, January 1 $ 100.5 Additional unbilled revenue recognized 229.1 Less: amounts billed to customers (192.3 ) Ending balance $ 137.3 There were no impairment losses recorded on unbilled receivables for the nine months ended September 30, 2018

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Segment Information	Note 12 - Segment Information The primary measurement used by management to measure the financial performance of each segment is earnings before interest and taxes ("EBIT"). Three Months Ended Nine Months Ended 2018 2017 2018 2017 Net sales: Mobile Industries $ 464.2 $ 422.8 $ 1,441.8 $ 1,214.2 Process Industries 417.1 348.6 1,228.9 1,011.6 Net sales $ 881.3 $ 771.4 $ 2,670.7 $ 2,225.8 Segment EBIT: Mobile Industries $ 50.6 $ 35.0 $ 156.2 $ 102.0 Process Industries 81.8 61.7 254.0 166.0 Total EBIT, for reportable segments $ 132.4 $ 96.7 $ 410.2 $ 268.0 Corporate expenses (17.9 ) (12.1 ) (47.2 ) (36.4 ) Pension-related charges (5.3 ) — (3.1 ) (4.4 ) Interest expense (12.5 ) (10.1 ) (33.2 ) (26.5 ) Interest income 0.6 0.7 1.5 2.0 Income before income taxes $ 97.3 $ 75.2 $ 328.2 $ 202.7

Retirement Benefit Plans

Retirement Benefit Plans	9 Months Ended
	Sep. 30, 2018
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Disclosure [Text Block]	Note 13 - Retirement Benefit Plans The following table sets forth the net periodic benefit cost for the Company’s defined benefit pension plans. The amounts for the three and nine months ended September 30, 2018 are based on calculations prepared by the Company's actuaries and represent the Company’s best estimate of the respective period’s proportionate share of the amounts to be recorded for the year ending December 31, 2018 . U.S. Plans International Plans Total Three Months Ended Three Months Ended Three Months Ended 2018 2017 2018 2017 2018 2017 Components of net periodic benefit cost: Service cost $ 3.3 $ 3.1 $ 0.4 $ 0.4 $ 3.7 $ 3.5 Interest cost 6.0 6.2 1.8 1.9 7.8 8.1 Expected return on plan assets (7.6 ) (7.0 ) (2.9 ) (2.9 ) (10.5 ) (9.9 ) Amortization of prior service cost 0.4 0.3 0.1 0.1 0.5 0.4 Recognition of actuarial losses 4.8 — — — 4.8 — Net periodic benefit cost $ 6.9 $ 2.6 $ (0.6 ) $ (0.5 ) $ 6.3 $ 2.1 U.S. Plans International Plans Total Nine Months Ended Nine Months Ended Nine Months Ended 2018 2017 2018 2017 2018 2017 Components of net periodic benefit cost: Service cost $ 9.7 $ 9.2 $ 1.2 $ 1.2 $ 10.9 $ 10.4 Interest cost 17.7 18.5 5.5 5.6 23.2 24.1 Expected return on plan assets (22.2 ) (21.0 ) (8.8 ) (8.3 ) (31.0 ) (29.3 ) Amortization of prior service cost 1.2 1.0 0.1 0.1 1.3 1.1 Recognition of actuarial losses 2.4 4.4 — — 2.4 4.4 Net periodic benefit cost $ 8.8 $ 12.1 $ (2.0 ) $ (1.4 ) $ 6.8 $ 10.7 During the three and nine months ended September 30, 2018 , the Company recognized actuarial losses of $4.8 million and $2.4 million , respectively. During the nine months ended September 30, 2017 , the Company recognized actuarial losses of $4.4 million

Postretirement Benefit Plans

Postretirement Benefit Plans	9 Months Ended
	Sep. 30, 2018
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Disclosure [Text Block]	Note 14 - Other Postretirement Benefit Plans The following table sets forth the net periodic benefit cost for the Company’s other postretirement benefit plans. The amounts for the three and nine months ended September 30, 2018 are based on calculations prepared by the Company's actuaries and represent the Company’s best estimate of the respective period’s proportionate share of the amounts to be recorded for the year ending December 31, 2018 . Three Months Ended Nine Months Ended 2018 2017 2018 2017 Components of net periodic benefit cost: Service cost $ — $ — $ 0.1 $ 0.1 Interest cost 1.9 2.3 5.6 6.8 Expected return on plan assets (0.9 ) (1.4 ) (2.8 ) (4.2 ) Amortization of prior service credit (0.4 ) (0.3 ) (1.2 ) (0.8 ) Net periodic benefit cost $ 0.6 $ 0.6 $ 1.7 $ 1.9

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value	Note 16 - Fair Value Fair value is defined as the price that would be expected to 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 tables present the fair value hierarchy for those financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2018 and December 31, 2017 : September 30, 2018 Total Level 1 Level 2 Level 3 Assets: Cash and cash equivalents $ 132.4 $ 130.9 $ 1.5 $ — Cash and cash equivalents measured at net asset value 21.3 Restricted cash 1.3 1.3 — — Short-term investments 16.5 2.1 14.4 — Short-term investments measured at net asset value 0.1 Foreign currency hedges 6.3 — 6.3 — Total Assets $ 177.9 $ 134.3 $ 22.2 $ — Liabilities: Foreign currency hedges $ 1.1 $ — $ 1.1 $ — Total Liabilities $ 1.1 $ — $ 1.1 $ — December 31, 2017 Total Level 1 Level 2 Level 3 Assets: Cash and cash equivalents $ 108.5 $ 107.3 $ 1.2 $ — Cash and cash equivalents measured at net asset value 13.1 Restricted cash 3.8 3.8 — — Short-term investments 16.2 — 16.2 — Short-term investments measured at net asset value 0.2 Foreign currency hedges 1.3 — 1.3 — Total Assets $ 143.1 $ 111.1 $ 18.7 $ — Liabilities: Foreign currency hedges $ 7.1 $ — $ 7.1 $ — Total Liabilities $ 7.1 $ — $ 7.1 $ — Cash and cash equivalents are highly liquid investments with maturities of three months or less when purchased and are valued at the redemption value. Short-term investments are investments with maturities between four months and one year and generally are valued at amortized cost, which approximates fair value. A portion of the cash and cash equivalents and short-term investments are valued based on net asset value. The Company uses publicly available foreign currency forward and spot rates to measure the fair value of its foreign currency forward contracts. The Company does not believe it has significant concentrations of risk associated with the counterparties to its financial instruments. Additionally, the Company remeasures certain assets to fair value, using Level 3 measurements, as a result of the occurrence of triggering events such as purchase accounting for acquisitions. See Note 3 - Acquisitions and Divestitures for further discussion. No other material assets were measured at fair value on a nonrecurring basis during the nine months ended September 30, 2018 and 2017 , respectively. Financial Instruments: The Company’s financial instruments consist primarily of cash and cash equivalents, short-term investments, accounts receivable, trade accounts payable, 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, trade accounts payable and short-term borrowings are a reasonable estimate of their fair value. Due to the nature of fair value calculations for variable-rate debt, the carrying value of the Company's long-term variable-rate debt is a reasonable estimate of its fair value. The fair value of the Company’s long-term fixed-rate debt, based on quoted market prices, was $1,080.2 million and $720.3 million at September 30, 2018 and December 31, 2017 , respectively. The carrying value of this debt was $1,073.6 million and $682.4 million at September 30, 2018 and December 31, 2017

Derivatives and Hedging Activit

Derivatives and Hedging Activities (Notes)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	Note 17 - Derivative Instruments and Hedging Activities The Company is exposed to certain risks relating to its ongoing business operations. The primary risks managed by using derivative instruments are foreign currency exchange rate risk and interest rate risk. Forward contracts on various foreign currencies are entered into in order to manage the foreign currency exchange rate risk associated with certain of the Company's commitments denominated in foreign currencies. From time to time, interest rate swaps are used to manage interest rate risk associated with the Company’s fixed and floating-rate borrowings. The Company designates certain foreign currency forward contracts as cash flow hedges of forecasted revenues and certain interest rate hedges as cash flow hedges of fixed-rate borrowings. The Company does not purchase or hold any derivative financial instruments for trading purposes. As of September 30, 2018 and December 31, 2017 , the Company had $347.6 million and $386.9 million , respectively, of outstanding foreign currency forward contracts at notional value. Refer to Note 16 - Fair Value for the fair value disclosure of derivative financial instruments. Cash Flow Hedging Strategy: For certain derivative instruments that are designated and qualify as cash flow hedges ( i.e ., hedging the exposure to variability in expected future cash flows that is attributable to a particular risk), the effective portion of the gain or loss on the derivative instrument is reported as a component of other comprehensive income and reclassified into earnings in the same line item associated with the forecasted transaction and in the same period or periods during which the hedged transaction affects earnings. The remaining gain or loss on the derivative instrument in excess of the cumulative change in the present value of future cash flows of the hedged item, if any ( i.e ., the ineffective portion), or hedge components excluded from the assessment of effectiveness, are recognized in the Consolidated Statement of Income during the current period. To protect against a reduction in the value of forecasted foreign currency cash flows resulting from export sales, the Company has instituted a foreign currency cash flow hedging program. The Company hedges portions of its forecasted cash flows denominated in foreign currencies with forward contracts. When the dollar strengthens significantly against foreign currencies, the decline in the present value of future foreign currency revenue is offset by gains in the fair value of the forward contracts designated as hedges. Conversely, when the dollar weakens, the increase in the present value of future foreign currency cash flows is offset by losses in the fair value of the forward contracts. The maximum length of time over which the Company hedges its exposure to the variability in future cash flows for forecast transactions is generally eighteen months or less. Purpose for Derivative Instruments not designated as Hedging Instruments: For derivative instruments that are not designated as hedging instruments, the instruments are typically forward contracts. In general, the practice is to reduce volatility by selectively hedging transaction exposures including intercompany loans, accounts payable and accounts receivable. Intercompany loans between entities with different functional currencies typically are hedged with a forward contract at the inception of the loan with a maturity date corresponding to the maturity of the loan. The revaluation of these contracts, as well as the revaluation of the underlying balance sheet items, is recorded directly to the income statement so the adjustment generally offsets the revaluation of the underlying balance sheet items to protect cash payments and reduce income statement volatility. The following table presents the fair value of the Company's derivative instruments at September 30, 2018 and December 31, 2017 . Those balances are presented within "Other non-current assets" and "Other non-current liabilities" in the Consolidated Balance Sheets. Asset Derivatives Liability Derivatives Derivatives designated as hedging instruments: September 30, 2018 December 31, 2017 September 30, 2018 December 31, 2017 Foreign currency forward contracts $ 3.4 $ 0.5 $ 0.3 $ 2.1 Derivatives not designated as hedging instruments: Foreign currency forward contracts 2.9 0.8 0.8 5.0 Total Derivatives $ 6.3 $ 1.3 $ 1.1 $ 7.1 The following tables present the impact of derivative instruments for the three and nine months ended September 30, 2018 and 2017 , respectively, and their location within the Consolidated Statements of Income: Amount of gain or (loss) recognized in Other Comprehensive Loss Three Months Ended Nine Months Ended Derivatives in cash flow hedging relationships: 2018 2017 2018 2017 Foreign currency forward contracts $ 1.0 $ (1.6 ) $ 5.0 $ (4.7 ) Interest rate swaps — (2.4 ) — (2.4 ) Total $ 1.0 $ (4.0 ) $ 5.0 $ (7.1 ) Amount of gain or (loss) reclassified from Accumulated Other Comprehensive Loss into income (effective portion) Three Months Ended Nine Months Ended Derivatives in cash flow hedging relationships: Location of gain or (loss) recognized in income 2018 2017 2018 2017 Foreign currency forward contracts Cost of products sold $ 1.6 $ (0.9 ) $ 0.2 $ (0.2 ) Interest rate swaps Interest expense (0.1 ) — (0.5 ) (0.2 ) Total $ 1.5 $ (0.9 ) $ (0.3 ) $ (0.4 ) Amount of gain or (loss) recognized in income Three Months Ended Nine Months Ended Derivatives not designated as hedging instruments: Location of gain or (loss) recognized in income 2018 2017 2018 2017 Foreign currency forward contracts Other income (expense), net $ (0.8 ) $ 2.7 $ 6.4 $ (5.6 )

Recent Accounting Pronouncement

Recent Accounting Pronouncements New Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2018
Concentration Risk [Line Items]
Revenue Recognition, Policy [Policy Text Block]	The Company's significant accounting policies are detailed in "Note 1 - Significant Accounting Policies" of the Annual Report on Form 10-K for the year ended December 31, 2017. In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers (Topic 606)", which was adopted by the Company on January 1, 2018. Also, in March 2017, the FASB issued ASU 2017-07, “Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost", which was adopted by the Company on January 1, 2018. Significant changes to the Company's accounting policies as a result of adopting ASU 2014-09 (the “new revenue standard”) and ASU 2017-07 are discussed below: Revenue: A contract exists when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. Revenue is recognized when performance obligations under the terms of a contract with a customer of the Company are satisfied. A majority of the Company's revenue is from short-term, fixed-price contracts and continues to be recognized as of a point in time when products are shipped from the Company's manufacturing facilities or at a later point in time when control of the products transfers to the customer. Revenue was previously recognized for services and certain sales of customer-specific product at the point in time when the shipping terms were satisfied. Under the new revenue standard, the Company now recognizes revenue over time as it satisfies the performance obligations because of the continuous transfer of control to the customer, supported as follows: • For certain service contracts, this continuous transfer of control to the customer occurs as the Company's service enhances assets that the customer owns and controls at all times and the Company is contractually entitled to payment for work performed to date plus a reasonable margin. • For United States ("U.S.") government contracts, the customer is allowed to unilaterally terminate the contract for convenience, and is required to pay the Company for costs incurred plus a reasonable margin and can take control of any work in process. • For certain non-U.S. government contracts involving customer-specific products, the customer controls the work in process based on contractual termination clauses or restrictions on the Company's use of the product and the Company possesses a right to payment for work performed to date plus a reasonable margin. As a result of control transferring over time for these products and services, revenue is recognized based on progress toward completion of the performance obligation. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services to be provided. The Company has elected to use the cost-to-cost input measure of progress for these contracts because it best depicts the transfer of goods or services to the customer based on incurring costs on the contracts. Under the cost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Revenues are recorded proportionally as costs are incurred. The pricing and payment terms for non-U.S. government contracts is based on the Company's standard terms and conditions or the result of specific negotiations with each customer. The Company's standard terms and conditions require payment 30 days from the invoice date, but the timing of payment for specific negotiated terms may vary. The Company also has both prime and subcontracts in support of the provision of goods and services to the U.S. government. Certain of these contracts are subject to the Federal Acquisition Regulation ("FAR") and are priced commercially based on a competitive market. Under the payment terms of those U.S. government fixed-price contracts, the customer pays the Company performance-based payments, which are interim payments of up to 80% of the contract price for costs incurred to date based on quantifiable measures of performance or on the achievement of specified events or milestones. Because the customer retains a portion of the contract price until completion of such contracts, certain of these U.S. government fixed-price contracts result in revenue recognized in excess of billings, which is presented within "Unbilled Receivables" on the Consolidated Balance Sheet. The portion of the payments retained by the customer until final contract settlement is not considered a significant financing component because the intent is to protect the customer. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring goods or providing services. Sales, value add, and other taxes the Company collects concurrent with revenue-producing activities are excluded from revenue. As a practical expedient, the Company may exclude an assessment of whether promised goods or services are performance obligations, if they are immaterial in the context of the contract with the customer, and combine these with other performance obligations. The Company has elected to recognize incremental costs incurred to obtain contracts, which primarily represent commissions paid to third-party sales agents where the amortization period would be less than one year, as "Selling, general and administrative ("SG&A") expenses" in the Consolidated Statement of Income as incurred. The Company has also elected not to adjust the promised amount of consideration for the effects of any significant financing component where the Company expects, at contract inception, that the period between when the Company transfers a promised good or service to a customer and when the customer pays for that good or service will be one year or less. Finally, the Company's policy is to exclude performance obligations resulting from contracts with a duration of one year or less from its disclosures related to remaining performance obligations. The amount of consideration to which the Company expects to be entitled in exchange for the goods and services is not generally subject to significant variations. However, the Company does offer certain customers rebates, prompt payment discounts, end-user discounts, the right to return eligible products, and/or other forms of variable consideration. The Company estimates this variable consideration using the expected value amount, which is based on historical experience. The Company includes estimated amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. The Company adjusts the estimate of revenue at the earlier of when the amount of consideration the Company expects to receive changes or when the consideration becomes fixed. The Company recognizes the cost of freight and shipping when control of the products or services has transferred to the customer as an expense in "Cost of products sold" on the Consolidated Statement of Income, because those are costs incurred to fulfill the promise recognized, not a separate performance obligation. To the extent certain freight and shipping fees are charged to customers, the Company recognizes the amounts charged to customers as revenues and the related costs as an expense in "Cost of products sold" when control of the related products or services has transferred to the customer.
Pension and Other Postretirement Plans, Pensions, Policy [Policy Text Block]	Pension and Other Postretirement Benefits:With the adoption of ASU 2017-07 on January 1, 2018, service cost is included in other employee compensation costs within operating income and is the only component of net periodic benefit cost that may be capitalized when applicable. The other components of net periodic benefit cost are presented separately outside of operating income. Also, actuarial gains and losses are excluded from segment results, while all other components of net periodic benefit cost will continue to be included within segment results.
Trade and Other Accounts Receivable, Policy [Policy Text Block]	Accounts Receivable, Less Allowances: "Accounts receivable, less allowances" on the Consolidated Balance Sheet include amounts billed and currently due from customers. The amounts due are stated at their net estimated realizable value. The Company maintains an allowance for doubtful accounts, which represents an estimate of the losses expected from the accounts receivable portfolio, to reduce accounts receivable to their net realizable value. The allowance is based upon historical trends in collections and write-offs, management's judgment of the probability of collecting accounts and management's evaluation of business risk. The Company extends credit to customers satisfying pre-defined credit criteria. The Company believes it has limited concentration of credit risk due to the diversity of its customer base. Prior to the adoption of the new revenue standard, the Company recognized a portion of its revenues on the percentage-of-completion method measured on the cost-to-cost basis. As of December 31, 2017, revenue recognized in excess of billings of $67.3 million related to these revenues were included in "Accounts receivable, less allowances" on the Consolidated Balance Sheet. In accordance with the new revenue standard, $88.9 million of revenue recognized in excess of billings related to these revenues are included in "Unbilled receivables" on the Consolidated Balance Sheet at September 30, 2018
Revenue from Contract with Customer [Member]
Concentration Risk [Line Items]
Revenue Recognition, Policy [Policy Text Block]	:"Unbilled receivables" on the Consolidated Balance Sheet primarily include unbilled amounts typically resulting from sales under long-term contracts when the cost-to-cost method of revenue recognition is utilized, the revenue recognized exceeds the amount billed to the customer and the right to payment is primarily just subject to the passage of time. Amounts may not exceed their net realizable value.

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The following table presents the preliminary purchase price allocation at fair value related to the 2018 acquisitions at the date of acquisition: Preliminary Purchase Assets: Accounts receivable, net $ 43.3 Inventories, net 58.3 Other current assets 7.2 Property, plant and equipment, net 68.3 Goodwill 468.2 Other intangible assets 366.0 Other non-current assets 18.8 Total assets acquired $ 1,030.1 Liabilities: Accounts payable, trade $ 34.5 Salaries, wages and benefits 9.2 Income taxes payable 1.6 Other current liabilities 9.2 Short-term debt 1.8 Long-term debt 1.7 Accrued pension cost 7.0 Accrued postretirement benefits cost 11.8 Deferred income taxes 113.0 Other non-current liabilities 8.9 Total liabilities assumed $ 198.7 Net assets acquired $ 831.4
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	The following table summarizes the preliminary purchase price allocation for identifiable intangible assets acquired in 2018 : Preliminary Purchase Weighted - Trade names (indefinite life) $ 47.4 Indefinite Trade names (finite life) 1.8 15 years Technology and know-how 127.2 17 years Customer relationships 189.6 19 years Total intangible assets $ 366.0

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2018
Inventory Disclosure [Abstract]
Components of inventories	The components of inventories at September 30, 2018 and December 31, 2017 were as follows: September 30, December 31, Manufacturing supplies $ 32.1 $ 29.0 Raw materials 109.2 90.4 Work in process 290.6 245.2 Finished products 454.2 404.3 Subtotal 886.1 768.9 Allowance for obsolete and surplus inventory (45.1 ) (30.0 ) Total Inventories, net $ 841.0 $ 738.9

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	9 Months Ended
	Sep. 30, 2018
Long Lived Assets Held-for-sale [Line Items]
Components of property, plant and equipment	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">The components of property, plant and equipment at </font><font style="font-family:Arial;font-size:10pt;">September 30, 2018</font><font style="font-family:Arial;font-size:10pt;"> and </font><font style="font-family:Arial;font-size:10pt;">December 31, 2017</font><font style="font-family:Arial;font-size:10pt;"> were as follows:</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="7" rowspan="1"></td></tr><tr><td style="width:72%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:12%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:12%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;font-weight:bold;">September 30, <br clear="none"/>2018</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;">December 31, <br clear="none"/>2017</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Land and buildings</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">482.1</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">483.0</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Machinery and equipment</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">1,966.1</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">1,922.6</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Subtotal</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">2,448.2</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">2,405.6</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Accumulated depreciation</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">(1,561.4</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">)</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">(1,541.4</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">)</font></div></td></tr><tr><td style="vertical-align:top;border-bottom:2px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Property, plant and equipment, net</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">$</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">886.8</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">864.2</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div></div></div>

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2018
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, 2018 were as follows: Mobile Industries Process Industries Total Beginning balance $ 254.3 $ 257.5 $ 511.8 Acquisitions 16.2 448.8 465.0 Divestiture (5.1 ) — (5.1 ) Foreign currency translation adjustments and other changes (6.2 ) (0.1 ) (6.3 ) Ending balance $ 259.2 $ 706.2 $ 965.4
Intangible assets	The following table displays intangible assets as of September 30, 2018 and December 31, 2017 : Balance at September 30, 2018 Balance at December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Intangible assets subject to amortization: Customer relationships $ 503.3 $ 119.1 $ 384.2 $ 324.6 $ 103.0 $ 221.6 Technology and know-how 254.0 39.3 214.7 128.7 33.8 94.9 Trade names 9.5 4.7 4.8 8.6 4.3 4.3 Capitalized software 262.8 233.9 28.9 261.5 226.5 35.0 Other 9.6 5.9 3.7 10.3 6.2 4.1 $ 1,039.2 $ 402.9 $ 636.3 $ 733.7 $ 373.8 $ 359.9 Intangible assets not subject to amortization: Trade names $ 98.1 $ 98.1 $ 52.0 $ 52.0 FAA air agency certificates 8.7 8.7 8.7 8.7 $ 106.8 $ 106.8 $ 60.7 $ 60.7 Total intangible assets $ 1,146.0 $ 402.9 $ 743.1 $ 794.4 $ 373.8 $ 420.6

Contingencies (Tables)

Contingencies (Tables)	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Product Warranty Liability [Table Text Block]	In addition to the contingencies above, the Company provides limited warranties on certain of its products. The following table is a rollforward of the warranty liability for the nine months ended September 30, 2018 and the twelve months ended December 31, 2017 : September 30, December 31, Beginning balance, January 1 $ 5.8 $ 6.9 Additions 3.3 2.7 Payments (1.6 ) (3.8 ) Ending balance $ 7.5 $ 5.8

Financing Arrangements (Tables)

Financing Arrangements (Tables)	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Short-term debt	Short-term debt at September 30, 2018 and December 31, 2017 was as follows: September 30, December 31, Variable-rate Accounts Receivable Facility with an interest rate of 2.15% at December 31, 2017 $ — $ 62.9 Borrowings under variable-rate lines of credit for certain of the Company’s foreign subsidiaries with various banks with interest rates ranging from 0.33% to 9.45% at September 30, 2018 and 0.32% to 2.22% at December 31, 2017 37.0 42.5 Short-term debt $ 37.0 $ 105.4
Long-term debt	Long-term debt at September 30, 2018 and December 31, 2017 was as follows: September 30, December 31, Fixed-rate Medium-Term Notes, Series A (1) , maturing at various dates through May 2028, with interest rates ranging from 6.74% to 7.76% $ 154.6 $ 154.5 Fixed-rate Senior Unsecured Notes (1) , maturing on September 1, 2024, with an interest rate of 3.875% 347.5 346.9 Variable-rate Senior Credit Facility with a weighted-average interest rate of 2.43% at September 30, 2018 and 1.83% at December 31, 2017 65.2 52.0 Variable-rate Accounts Receivable Facility with an interest rate of 3.05% at September 30, 2018 93.2 — Fixed-rate Euro Senior Unsecured Notes (1) , maturing on September 7, 2027, with an interest rate of 2.02% 173.4 179.3 Variable-rate Euro Term Loan (1) with an interest rate of 1.13% at September 30, 2018 and December 31, 2017 108.3 119.7 Fixed-rate Senior Unsecured Notes (1) , maturing on December 15, 2028, with an interest rate of 4.50% 396.0 — Variable-rate Term Loan (1) with an interest rate of 3.38% at September 30, 2018 349.2 — Other 5.7 4.5 1,693.1 856.9 Less: Current maturities 11.4 2.7 Long-term debt $ 1,681.7 $ 854.2

Equity (Tables)

Equity (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Equity	The changes in the components of equity for the nine months ended September 30, 2018 were as follows: The Timken Company Shareholders Total Stated Capital Other Paid-In Capital Earnings Invested in the Business Accumulated Other Comprehensive (Loss) Treasury Stock Non- controlling Interest Balance at December 31, 2017 $ 1,474.9 $ 53.1 $ 903.8 $ 1,408.4 $ (38.3 ) $ (884.3 ) $ 32.2 Cumulative effect of the new revenue standard 7.7 7.7 Cumulative effect of ASU 2018-02 — 0.7 (0.7 ) Net income 244.7 242.8 1.9 Foreign currency translation adjustment (62.5 ) (53.8 ) (8.7 ) Change in fair value of derivative financial 4.0 4.0 Shares issued for the acquisition of ABC 66.0 30.9 35.1 Dividends – $0.83 per share (64.2 ) (64.2 ) Stock-based compensation 25.5 25.5 Stock purchased at fair market value (63.0 ) (63.0 ) Stock option exercise activity 12.7 (3.7 ) 16.4 Restricted share activity — (11.4 ) 11.4 Shares surrendered for taxes (5.4 ) (5.4 ) Balance at September 30, 2018 $ 1,640.4 $ 53.1 $ 945.1 $ 1,595.4 $ (88.8 ) $ (924.9 ) $ 60.5

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2018
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following tables present details about components of accumulated other comprehensive loss for the three and nine months ended September 30, 2018 and 2017 , respectively: Foreign currency translation adjustments Pension and postretirement liability adjustments Change in fair value of derivative financial instruments Total Balance at June 30, 2018 $ (70.4 ) $ (0.4 ) $ 0.9 $ (69.9 ) Other comprehensive (loss) income before (24.2 ) — 1.0 (23.2 ) Amounts reclassified from accumulated other — — (1.5 ) (1.5 ) Income tax expense — — 0.1 0.1 Net current period other comprehensive loss, net of income taxes (24.2 ) — (0.4 ) (24.6 ) Noncontrolling interest 5.7 — — 5.7 Net current period comprehensive loss, net (18.5 ) — (0.4 ) (18.9 ) Balance at September 30, 2018 $ (88.9 ) $ (0.4 ) $ 0.5 $ (88.8 ) Foreign currency translation adjustments Pension and postretirement liability adjustments Change in fair value of derivative financial instruments Total Balance at December 31, 2017 $ (35.1 ) $ (0.3 ) $ (2.9 ) $ (38.3 ) Cumulative effect of ASU 2018-02 — (0.1 ) (0.6 ) (0.7 ) Balance at January 1, 2018 (35.1 ) (0.4 ) (3.5 ) (39.0 ) Other comprehensive (loss) income before (62.5 ) — 5.0 (57.5 ) Amounts reclassified from accumulated other — — 0.3 0.3 Income tax benefit — — (1.3 ) (1.3 ) Net current period other comprehensive (loss) (62.5 ) — 4.0 (58.5 ) Noncontrolling interest 8.7 — — 8.7 Net current period comprehensive (loss) income, net of income taxes, noncontrolling interest and cumulative effect of accounting change (53.8 ) (0.1 ) 3.4 (50.5 ) Balance at September 30, 2018 $ (88.9 ) $ (0.4 ) $ 0.5 $ (88.8 ) Foreign currency translation adjustments Pension and postretirement liability adjustments Change in fair value of derivative financial instruments Total Balance at June 30, 2017 $ (49.9 ) $ 1.6 $ (1.8 ) $ (50.1 ) Other comprehensive income (loss) before 10.9 — (4.0 ) 6.9 Amounts reclassified from accumulated other — 0.1 0.9 1.0 Income tax expense — — 1.1 1.1 Net current period other comprehensive 10.9 0.1 (2.0 ) 9.0 Noncontrolling interest 0.1 — — 0.1 Net current period comprehensive income (loss), net 11.0 0.1 (2.0 ) 9.1 Balance at September 30, 2017 $ (38.9 ) $ 1.7 $ (3.8 ) $ (41.0 ) Foreign currency translation adjustments Pension and postretirement liability adjustments Change in fair value of derivative financial instruments Total Balance at December 31, 2016 $ (79.8 ) $ 1.5 $ 0.4 $ (77.9 ) Other comprehensive income (loss) before 42.8 — (7.1 ) 35.7 Amounts reclassified from accumulated other — 0.3 0.4 0.7 Income tax expense (benefit) — (0.1 ) 2.5 2.4 Net current period other comprehensive 42.8 0.2 (4.2 ) 38.8 Noncontrolling interest (1.9 ) — — (1.9 ) Net current period comprehensive income (loss), net of income taxes and noncontrolling interest 40.9 0.2 (4.2 ) 36.9 Balance at September 30, 2017 $ (38.9 ) $ 1.7 $ (3.8 ) $ (41.0 )

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2018
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 and nine months ended September 30, 2018 and 2017 , respectively: Three Months Ended Nine Months Ended 2018 2017 2018 2017 Numerator: Net income attributable to The Timken Company $ 71.6 $ 53.5 $ 242.8 $ 174.2 Less: undistributed earnings allocated to nonvested stock — — — — Net income available to common shareholders for basic and diluted earnings per share $ 71.6 $ 53.5 $ 242.8 $ 174.2 Denominator: Weighted average number of shares outstanding - basic 76,903,395 77,694,974 77,332,209 77,766,828 Effect of dilutive securities: Stock options and awards - based on the treasury stock method 1,524,710 1,109,322 1,313,294 1,123,102 Weighted average number of shares outstanding, assuming dilution of stock options and awards 78,428,105 78,804,296 78,645,503 78,889,930 Basic earnings per share $ 0.93 $ 0.69 $ 3.14 $ 2.24 Diluted earnings per share $ 0.91 $ 0.68 $ 3.09 $ 2.21

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	The following table presents details deemed most relevant to the users of the financial statements about total revenue for the three and nine months ended September 30, 2018 and 2017 , respectively: Three Months Ended Three Months Ended September 30, 2018 September 30, 2017 Mobile Process Total Mobile (1) Process (1) Total (1) United States $ 255.3 $ 192.9 $ 448.2 $ 231.6 $ 163.0 $ 394.6 Americas excluding United States 51.6 42.9 94.5 48.1 37.5 85.6 Europe / Middle East / Africa 89.3 86.0 175.3 84.2 70.7 154.9 Asia-Pacific 68.0 95.3 163.3 58.9 77.4 136.3 Net sales $ 464.2 $ 417.1 $ 881.3 $ 422.8 $ 348.6 $ 771.4 Nine Months Ended Nine Months Ended September 30, 2018 September 30, 2017 Mobile Process Total Mobile (1) Process (1) Total (1) United States $ 774.4 $ 561.5 $ 1,335.9 $ 707.2 $ 490.0 $ 1,197.2 Americas excluding United States 160.3 132.0 292.3 133.3 110.0 243.3 Europe / Middle East / Africa 292.5 266.4 558.9 213.8 196.7 410.5 Asia-Pacific 214.6 269.0 483.6 159.9 214.9 374.8 Net sales $ 1,441.8 $ 1,228.9 $ 2,670.7 $ 1,214.2 $ 1,011.6 $ 2,225.8 (1)
Contract with Customer, Asset and Liability [Table Text Block]	: The following table contains a rollforward of unbilled receivables for the nine months ended September 30, 2018 : September 30, Beginning balance, January 1 $ 100.5 Additional unbilled revenue recognized 229.1 Less: amounts billed to customers (192.3 ) Ending balance $ 137.3

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Segment wise financial performance	The primary measurement used by management to measure the financial performance of each segment is earnings before interest and taxes ("EBIT"). Three Months Ended Nine Months Ended 2018 2017 2018 2017 Net sales: Mobile Industries $ 464.2 $ 422.8 $ 1,441.8 $ 1,214.2 Process Industries 417.1 348.6 1,228.9 1,011.6 Net sales $ 881.3 $ 771.4 $ 2,670.7 $ 2,225.8 Segment EBIT: Mobile Industries $ 50.6 $ 35.0 $ 156.2 $ 102.0 Process Industries 81.8 61.7 254.0 166.0 Total EBIT, for reportable segments $ 132.4 $ 96.7 $ 410.2 $ 268.0 Corporate expenses (17.9 ) (12.1 ) (47.2 ) (36.4 ) Pension-related charges (5.3 ) — (3.1 ) (4.4 ) Interest expense (12.5 ) (10.1 ) (33.2 ) (26.5 ) Interest income 0.6 0.7 1.5 2.0 Income before income taxes $ 97.3 $ 75.2 $ 328.2 $ 202.7

Retirement Benefit Plans (Table

Retirement Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2018
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
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 plans. The amounts for the three and nine months ended September 30, 2018 are based on calculations prepared by the Company's actuaries and represent the Company’s best estimate of the respective period’s proportionate share of the amounts to be recorded for the year ending December 31, 2018 . U.S. Plans International Plans Total Three Months Ended Three Months Ended Three Months Ended 2018 2017 2018 2017 2018 2017 Components of net periodic benefit cost: Service cost $ 3.3 $ 3.1 $ 0.4 $ 0.4 $ 3.7 $ 3.5 Interest cost 6.0 6.2 1.8 1.9 7.8 8.1 Expected return on plan assets (7.6 ) (7.0 ) (2.9 ) (2.9 ) (10.5 ) (9.9 ) Amortization of prior service cost 0.4 0.3 0.1 0.1 0.5 0.4 Recognition of actuarial losses 4.8 — — — 4.8 — Net periodic benefit cost $ 6.9 $ 2.6 $ (0.6 ) $ (0.5 ) $ 6.3 $ 2.1 U.S. Plans International Plans Total Nine Months Ended Nine Months Ended Nine Months Ended 2018 2017 2018 2017 2018 2017 Components of net periodic benefit cost: Service cost $ 9.7 $ 9.2 $ 1.2 $ 1.2 $ 10.9 $ 10.4 Interest cost 17.7 18.5 5.5 5.6 23.2 24.1 Expected return on plan assets (22.2 ) (21.0 ) (8.8 ) (8.3 ) (31.0 ) (29.3 ) Amortization of prior service cost 1.2 1.0 0.1 0.1 1.3 1.1 Recognition of actuarial losses 2.4 4.4 — — 2.4 4.4 Net periodic benefit cost $ 8.8 $ 12.1 $ (2.0 ) $ (1.4 ) $ 6.8 $ 10.7

Postretirement Benefit Plans (T

Postretirement Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2018
Postretirement Benefit Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule of Defined Benefit Plans Disclosures [Table Text Block]	The following table sets forth the net periodic benefit cost for the Company’s other postretirement benefit plans. The amounts for the three and nine months ended September 30, 2018 are based on calculations prepared by the Company's actuaries and represent the Company’s best estimate of the respective period’s proportionate share of the amounts to be recorded for the year ending December 31, 2018 . Three Months Ended Nine Months Ended 2018 2017 2018 2017 Components of net periodic benefit cost: Service cost $ — $ — $ 0.1 $ 0.1 Interest cost 1.9 2.3 5.6 6.8 Expected return on plan assets (0.9 ) (1.4 ) (2.8 ) (4.2 ) Amortization of prior service credit (0.4 ) (0.3 ) (1.2 ) (0.8 ) Net periodic benefit cost $ 0.6 $ 0.6 $ 1.7 $ 1.9

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2018
Income Taxes [Abstract]
Income Tax Disclosure [Text Block]	Note 15 - Income Taxes The Company's provision for income taxes in interim periods is computed by applying the estimated annual effective tax rates to income or loss before income taxes for the period. In addition, non-recurring or discrete items are recorded during the period(s) in which they occur. Three Months Ended Nine Months Ended 2018 2017 2018 2017 Provision for income taxes $ 25.0 $ 21.1 $ 83.5 $ 28.5 Effective tax rate 25.7 % 28.1 % 25.4 % 14.1 % The income tax expense for the three and nine months ended September 30, 2018 was calculated using the forecasted multi-jurisdictional annual effective tax rates to determine a blended annual effective tax rate. The effective tax rate differs from the U.S. federal statutory rate of 21% primarily due to the projected mix of earnings in international jurisdictions with relatively higher tax rates, losses in jurisdictions with no tax benefit due to valuation allowances and U.S. state and local income taxes. The effective tax rate of 25.7% for the three months ended September 30, 2018 is lower than the three months ended September 30, 2017 primarily due to the reduction of the federal statutory rate from 35% to 21% from U.S. Tax Reform beginning in 2018, partially offset by other U.S. Tax Reform provisions that reduced certain federal income tax deductions and created new foreign income inclusions. The effective tax rate of 25.4% for the nine months ended September 30, 2018 is higher than the nine months ended September 30, 2017 primarily due to the reversal of accruals for uncertain tax positions in 2017 along with U.S. Tax Reform impacts in 2018 that reduced certain federal income tax deductions and created new foreign income inclusions. This was partially offset by the reduced federal statutory rate from 35% to 21% beginning in 2018. U.S. Tax Reform was enacted on December 22, 2017 and significantly revised U.S. corporate income tax law, including reducing the U.S. federal statutory rate from 35% to 21% . U.S. Tax Reform requires companies to pay a one-time net charge related to the taxation of unremitted foreign earnings and creates new taxes, including a tax on certain foreign sourced earnings known as the global intangible low-taxed income (“GILTI”) tax. In addition, on December 22, 2017, the Securities and Exchange Commission ("SEC") issued Staff Accounting Bulletin No. 118 (“SAB 118”) to address the application of U.S. GAAP in situations when a registrant does not have the necessary information available, prepared or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of U.S. Tax Reform. In accordance with SAB 118, the accounting for the tax effects of U.S. Tax Reform is not complete as of September 30, 2018 ; however, provisional estimates have been made. Provisional estimates of $25.2 million for the one-time net charge related to the taxation of unremitted foreign earnings and $10.1 million related to the remeasurement of U.S. deferred tax balances to reflect the new U.S. corporate income tax rate were recognized as components of income tax expense in the year ended December 31, 2017 . For the nine months ended September 30, 2018 , the Company recorded $1.9 million of tax benefit for remeasurement of net U.S. deferred tax balances as a result of additional federal and state regulatory guidance issued, for adjustments to finalize the purchase accounting for Groeneveld and adjustments to provisional estimates of U.S. deferred tax assets included in the 2017 U.S. federal income tax return. Over the same period, the Company recorded $2.5 million of tax expense for changes in the provisional estimate of the 2017 one-time net charge related to the taxation of unremitted foreign earnings as a result of additional federal and state regulatory guidance issued and the filing of the Company's 2017 U.S. federal income tax return. The Company continues to analyze the effects of U.S. Tax Reform during the one-year SAB 118 measurement period and the final conclusions may materially differ from the provisional estimates. Additional information including refined computations and evaluation of future treasury regulations, tax law technical corrections and other notices and rulings are still needed to prepare a more complete analysis related to the provisional estimates. Subsequent adjustments to the Company’s provisional estimates will be recorded in current tax expense in the fourth quarter of 2018 when the analysis is complete. A provisional estimate for the GILTI provisions was not recognized as a component of income tax expense in the year ended December 31, 2017 as the Company had not completed its assessment or made an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or to record it as a period cost if and when incurred. At September 30, 2018 , given the complexity of the GILTI provisions, the Company is still evaluating the effects and determining projections of future taxable income that are subject to the GILTI provisions. The Company has included GILTI related to current-year operations only in the forecasted annual effective tax rate and has not provided additional GILTI as a deferred amount.
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	The Company's provision for income taxes in interim periods is computed by applying the estimated annual effective tax rates to income or loss before income taxes for the period. In addition, non-recurring or discrete items are recorded during the period(s) in which they occur. Three Months Ended Nine Months Ended 2018 2017 2018 2017 Provision for income taxes $ 25.0 $ 21.1 $ 83.5 $ 28.5 Effective tax rate 25.7 % 28.1 % 25.4 % 14.1 %

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Assets and liabilities measured at fair value on a recurring basis	The following tables present the fair value hierarchy for those financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2018 and December 31, 2017 : September 30, 2018 Total Level 1 Level 2 Level 3 Assets: Cash and cash equivalents $ 132.4 $ 130.9 $ 1.5 $ — Cash and cash equivalents measured at net asset value 21.3 Restricted cash 1.3 1.3 — — Short-term investments 16.5 2.1 14.4 — Short-term investments measured at net asset value 0.1 Foreign currency hedges 6.3 — 6.3 — Total Assets $ 177.9 $ 134.3 $ 22.2 $ — Liabilities: Foreign currency hedges $ 1.1 $ — $ 1.1 $ — Total Liabilities $ 1.1 $ — $ 1.1 $ — December 31, 2017 Total Level 1 Level 2 Level 3 Assets: Cash and cash equivalents $ 108.5 $ 107.3 $ 1.2 $ — Cash and cash equivalents measured at net asset value 13.1 Restricted cash 3.8 3.8 — — Short-term investments 16.2 — 16.2 — Short-term investments measured at net asset value 0.2 Foreign currency hedges 1.3 — 1.3 — Total Assets $ 143.1 $ 111.1 $ 18.7 $ — Liabilities: Foreign currency hedges $ 7.1 $ — $ 7.1 $ — Total Liabilities $ 7.1 $ — $ 7.1 $ —

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Table)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]	The following table presents the fair value of the Company's derivative instruments at September 30, 2018 and December 31, 2017 . Those balances are presented within "Other non-current assets" and "Other non-current liabilities" in the Consolidated Balance Sheets. Asset Derivatives Liability Derivatives Derivatives designated as hedging instruments: September 30, 2018 December 31, 2017 September 30, 2018 December 31, 2017 Foreign currency forward contracts $ 3.4 $ 0.5 $ 0.3 $ 2.1 Derivatives not designated as hedging instruments: Foreign currency forward contracts 2.9 0.8 0.8 5.0 Total Derivatives $ 6.3 $ 1.3 $ 1.1 $ 7.1
Derivative Instruments, Gain (Loss) [Table Text Block]	The following tables present the impact of derivative instruments for the three and nine months ended September 30, 2018 and 2017 , respectively, and their location within the Consolidated Statements of Income: Amount of gain or (loss) recognized in Other Comprehensive Loss Three Months Ended Nine Months Ended Derivatives in cash flow hedging relationships: 2018 2017 2018 2017 Foreign currency forward contracts $ 1.0 $ (1.6 ) $ 5.0 $ (4.7 ) Interest rate swaps — (2.4 ) — (2.4 ) Total $ 1.0 $ (4.0 ) $ 5.0 $ (7.1 ) Amount of gain or (loss) reclassified from Accumulated Other Comprehensive Loss into income (effective portion) Three Months Ended Nine Months Ended Derivatives in cash flow hedging relationships: Location of gain or (loss) recognized in income 2018 2017 2018 2017 Foreign currency forward contracts Cost of products sold $ 1.6 $ (0.9 ) $ 0.2 $ (0.2 ) Interest rate swaps Interest expense (0.1 ) — (0.5 ) (0.2 ) Total $ 1.5 $ (0.9 ) $ (0.3 ) $ (0.4 )
Derivatives Not Designated as Hedging Instruments [Table Text Block]	Amount of gain or (loss) recognized in income Three Months Ended Nine Months Ended Derivatives not designated as hedging instruments: Location of gain or (loss) recognized in income 2018 2017 2018 2017 Foreign currency forward contracts Other income (expense), net $ (0.8 ) $ 2.7 $ 6.4 $ (5.6 )

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements Table (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Net, Current	$ (548.6)		$ (548.6)		$ (524.9)			$ (457.6)
Revenue from Contract with Customer, Excluding Assessed Tax	881.3	$ 771.4	2,670.7	$ 2,225.8
Cost of Goods and Services Sold	628	555.3	1,885.1	1,626.4	2,191.7	$ 1,963.5	$ 2,068.5
Gross Profit	253.3	216.1	785.6	599.4
Selling, General and Administrative Expense	142	134	432.4	375.5	508.3	440.2	484.6
Pension Settlement Charges						0	0
Operating Income (Loss)	108.7	80.8	350.1	220.1	299.5	244.4	333.2
Income (Loss) Before Income Taxes	97.3	75.2	328.2	202.7
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	4,499.5		4,499.5		3,402.4
Unbilled Receivables, Asset, Net	137.3		137.3		0			100.5
Inventory, Net	(841)		(841)		(738.9)			(716)
Other Assets, Current	76		76		81.2			84.2
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	(52.3)		(52.3)		(61)			(58.4)
Other Liabilities, Current	172.7		172.7		160.7			163.7
Assets, Current	1,786.3		1,786.3		1,500.1
Assets	4,499.5		4,499.5		3,402.4
Deferred income taxes	152.4		152.4		44
Liabilities, Noncurrent	2,202.5		2,202.5		1,255.8
Stockholders' Equity Attributable to Parent	1,579.9		1,579.9		1,442.7
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,640.4		1,640.4		1,474.9
Increase (Decrease) in Other Accrued Liabilities			10.2	15.9
Cumulative Effect on Retained Earnings, Tax	25	21.1	83.5	28.5
Other Nonoperating Income (Expense)	0.5	3.8	9.8	7.1	(5.4)	(70.8)	(84.8)
Net income	72.3	54.1	244.7	174.2
Net Income (Loss) Attributable to Parent	$ 71.6	$ 53.5	$ 242.8	$ 174.2
Basic earnings per share	$ 0.93	$ 0.69	$ 3.14	$ 2.24
Diluted earnings per share	$ 0.91	$ 0.68	$ 3.09	$ 2.21
Deferred Income Tax Expense (Benefit)			$ 2.2	$ 7.5
Increase (Decrease) in Accounts Receivable			65.7	61.6
Increase (Decrease) in Unbilled Receivables			37.6	0
Increase (Decrease) in Inventories			94.3	85.4
Increase (Decrease) in Other Operating Assets and Liabilities, Net			(17)	18.2
Net Cash Provided by Operating Activities			195	142.9
Restricted cash	$ 1.3	$ 3.3	1.3	3.3	3.8
Retained Earnings (Accumulated Deficit)	1,595.4		$ 1,595.4		1,408.4			1,416.1
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]			The new revenue standard introduces a five-step revenue recognition model in which an entity should recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The new revenue standard also requires disclosures sufficient to enable users to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers, including qualitative and quantitative disclosures about contracts with customers, significant judgments and changes in judgments and assets recognized from the costs to obtain or fulfill a contract. For further information about the Company's revenues from contracts with customers, refer to Note 11 - Revenue . On January 1, 2018, the Company adopted the new revenue standard and all of the related amendments using the modified retrospective method and applied those provisions to all open contracts. The Company recognized the cumulative effect of initially applying the new revenue standard as an adjustment to the opening balance of retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The cumulative effect of changes made to the balance sheet as of January 1, 2018 for the adoption of the new revenue standard was as follows: Balance at December 31, 2017 Effect of Accounting Change Balance at January 1, 2018 ASSETS Accounts receivable, less allowances $ 524.9 $ (67.3 ) $ 457.6 Unbilled receivables — 100.5 100.5 Inventories, net 738.9 (22.9 ) 716.0 Other current assets 81.2 3.0 84.2 Deferred income taxes 61.0 (2.6 ) 58.4 LIABILITIES Other current liabilities 160.7 3.0 163.7 EQUITY Earnings invested in the business 1,408.4 7.7 1,416.1 The tables below reflect changes to financial statement line items as a result of adopting the new revenue standard. The adoption of the new revenue standard did not have an impact on "Net cash used in operating activities" on the Consolidated Statement of Cash Flows for the nine months ended September 30, 2018 . Consolidated Statement of Income for the three months ended September 30, 2018 : Previous Accounting Method Effect of Accounting Change As Reported Net sales $ 875.6 $ 5.7 $ 881.3 Cost of products sold 623.2 4.8 628.0 Selling, general, and administrative expenses 141.3 0.7 142.0 Income before income taxes 97.1 0.2 97.3 Provision for income taxes 25.0 — 25.0 Net income 72.1 0.2 72.3 Net income attributable to The Timken Company $ 71.4 $ 0.2 $ 71.6 Basic earnings per share $ 0.93 $ — $ 0.93 Diluted earnings per share $ 0.91 $ — $ 0.91 Consolidated Statement of Income for the nine months ended September 30, 2018 : Previous Accounting Method Effect of Accounting Change As Reported Net sales $ 2,653.7 $ 17.0 $ 2,670.7 Cost of products sold 1,874.2 10.9 1,885.1 Selling, general, and administrative expenses 430.6 1.8 432.4 Income before income taxes 323.9 4.3 328.2 Provision for income taxes 82.5 1.0 83.5 Net income 241.4 3.3 244.7 Net income attributable to The Timken Company $ 239.5 $ 3.3 $ 242.8 Basic earnings per share $ 3.10 $ 0.04 $ 3.14 Diluted earnings per share $ 3.05 $ 0.04 $ 3.09 Consolidated Balance Sheet as of September 30, 2018 : Previous Accounting Method Effect of Accounting Change As Reported ASSETS Accounts receivable, less allowances $ 637.5 $ (88.9 ) $ 548.6 Unbilled receivables — 137.3 137.3 Inventories, net 874.8 (33.8 ) 841.0 Other current assets 72.5 3.5 76.0 Deferred income taxes 55.9 (3.6 ) 52.3 LIABILITIES Other current liabilities 169.2 3.5 172.7 EQUITY Earnings invested in the business 1,584.4 11.0 1,595.4
Accounting Standard Update 2018-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle			$ (0.7)
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Goods and Services Sold		0.9		(0.1)	(1.7)	(37.8)	15.7
Selling, General and Administrative Expense		0		(1.9)	(13.1)	(30.5)	26.9
Pension Settlement Charges						(1.6)	(119.9)
Operating Income (Loss)		(0.9)		2	14.8	69.9	77.3
Other Nonoperating Income (Expense)		0.9		(2)	(14.8)	(69.9)	(77.3)
Contracts Accounted for under Percentage of Completion [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unbilled Receivables, Current	88.9		88.9		67.3
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Net, Current	(637.5)		(637.5)
Revenue from Contract with Customer, Excluding Assessed Tax	875.6		2,653.7
Cost of Goods and Services Sold	623.2		1,874.2
Selling, General and Administrative Expense	141.3		430.6
Income (Loss) Before Income Taxes	97.1		323.9
Unbilled Receivables, Asset, Net	0		0
Inventory, Net	(874.8)		(874.8)
Other Assets, Current	72.5		72.5
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	(55.9)		(55.9)
Other Liabilities, Current	169.2		169.2
Cumulative Effect on Retained Earnings, Tax	25		82.5
Net income	72.1		241.4
Net Income (Loss) Attributable to Parent	$ 71.4		$ 239.5
Basic earnings per share	$ 0.93		$ 3.10
Diluted earnings per share	$ 0.91		$ 3.05
Retained Earnings (Accumulated Deficit)	$ 1,584.4		$ 1,584.4
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Net, Current	(88.9)		(88.9)					(67.3)
Revenue from Contract with Customer, Excluding Assessed Tax	5.7		17
Cost of Goods and Services Sold	4.8		10.9
Selling, General and Administrative Expense	0.7		1.8
Income (Loss) Before Income Taxes	0.2		4.3
Unbilled Receivables, Asset, Net	137.3		137.3					100.5
Inventory, Net	(33.8)		(33.8)					(22.9)
Other Assets, Current	3.5		3.5					3
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	(3.6)		(3.6)					(2.6)
Other Liabilities, Current	3.5		3.5					3
Cumulative Effect on Retained Earnings, Tax	0		1
Net income	0.2		3.3
Net Income (Loss) Attributable to Parent	$ 0.2		$ 3.3
Basic earnings per share	$ 0		$ 0.04
Diluted earnings per share	$ 0		$ 0.04
Retained Earnings (Accumulated Deficit)	$ 11		$ 11					$ 7.7
Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Goods and Services Sold		554.4		1,626.5	2,193.4	2,001.3	2,052.8
Selling, General and Administrative Expense		134		377.4	521.4	470.7	457.7
Pension Settlement Charges						(1.6)	(119.9)
Operating Income (Loss)		81.7		218.1	284.7	174.5	255.9
Other Nonoperating Income (Expense)		$ 2.9		$ 9.1	$ 9.4	$ (0.9)	$ (7.5)

Acquisitions (Details)

Acquisitions (Details) - USD ($) $ in Millions	Sep. 18, 2018	Sep. 01, 2018	Aug. 30, 2018	Jul. 03, 2017	May 05, 2017	Apr. 03, 2017	Sep. 30, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill, Purchase Accounting Adjustments							$ 3.2
2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables							43.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory							58.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other							7.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment							68.3
Business Combination Purchase Price Allocation Goodwill Amount							468.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill							366
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets							18.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets							1,030.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable							34.5
Business Combination Purchase Price Allocation Current Liabilities Accrued Liabilities							9.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt							1.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities							113
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities							198.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net							831.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles							366
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period							270
Business Combination, Consideration Transferred							831.4
Cash Acquired from Acquisition							30.1
Business Combination, Acquisition Related Costs							7.3
Cone Drive [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Sep. 18, 2018
Cone Drive [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Sep. 1, 2018
ABC Bearings [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Aug. 30, 2018
2017 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables							27.6	$ 27.6
Goodwill, Purchase Accounting Adjustments							3.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory							29.4	29.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other							6	3.3
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets							(0.5)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred							0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment							31.5	31.5
Business Combination Purchase Price Allocation Goodwill Amount							146.5	149.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill							173.6	173.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets							1.8	1.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets							416.4	416.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable							9.5	9.5
Business Combination Purchase Price Allocation Current Liabilities Accrued Liabilities							5.8	5.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other							8.5	8.6
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities							(0.5)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt							2.9	2.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities							41.5	42.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other							1.3	1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities							69.6	70.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net							346.8	346.8
Groeneveld [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition				Jul. 3, 2017
PT Tech [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition					May 5, 2017
Torsion Control Products [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition						Apr. 3, 2017
ICT Business [Member]
Business Acquisition [Line Items]
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period							15
Income Taxes Payable [Member] | 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other							1.6
Other Current Assets [Member] | 2017 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets							2.7
Short-term Debt [Member] | 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other							1.8
Short-term Debt [Member] | 2017 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other							0.1	$ 0.1
Deferred Tax Liability [Member] | 2017 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities							(0.7)
Other Current Liabilities [Member] | 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other							9.2
Other Current Liabilities [Member] | 2017 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities							(0.1)
Other Noncurrent Liabilities [Member] | 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other							8.9
Other Noncurrent Liabilities [Member] | 2017 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities							0.3
Trade Names [Member] | 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles							$ 1.8
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life							15 years
Technology-Based Intangible Assets [Member] | 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles							$ 127.2
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life							17 years
Customer Relationships [Member] | 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles							$ 189.6
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life							19 years
Trade Names [Member] | 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets							$ 47.4
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life							0 years
Pension Plan [Member] | 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other							$ 7
Postretirement Benefit Plans [Member] | 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other							$ 11.8

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Inventories, net:
Manufacturing supplies	$ 32.1		$ 29
Raw materials	109.2		90.4
Work in process	290.6		245.2
Inventory, Finished Goods, Gross	454.2		404.3
Subtotal	886.1		768.9
Allowance for obsolete and surplus inventory	(45.1)		(30)
Total Inventories, net	$ 841	$ 716	$ 738.9

Inventories (Details Textual)

Inventories (Details Textual) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Percentage of LIFO Inventory	44.00%
Percentage of FIFO Inventory	56.00%
Inventory Reserve (LIFO)	$ 172.4	$ 167.6

Property, Plant and Equipment_2

Property, Plant and Equipment (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment:
Land and buildings	$ 482.1	$ 483
Machinery and equipment	1,966.1	1,922.6
Subtotal	2,448.2	2,405.6
Accumulated depreciation	(1,561.4)	(1,541.4)
Property, Plant and Equipment, net	$ 886.8	$ 864.2

Property, Plant and Equipment_3

Property, Plant and Equipment (Details Textual) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Property Plant and Equipment (Textual) [Abstract]
Depreciation expense	$ 97.7	$ 95.5

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Details) $ in Millions	9 Months Ended
	Sep. 30, 2018USD ($)
Goodwill [Line Items]
Goodwill, Acquired During Period	$ 465
Goodwill, Other Increase (Decrease)	6.3
Change in the carrying amount of Goodwill
Goodwill, Beginning Balance	511.8
Goodwill, Ending Balance	965.4
Mobile Industries [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	16.2
Goodwill, Other Increase (Decrease)	(6.2)
Change in the carrying amount of Goodwill
Goodwill, Beginning Balance	254.3
Goodwill, Ending Balance	259.2
Process Industries [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	448.8
Goodwill, Other Increase (Decrease)	(0.1)
Change in the carrying amount of Goodwill
Goodwill, Beginning Balance	257.5
Goodwill, Ending Balance	$ 706.2

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Details 1) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Intangible assets subject to amortization:
Intangible assets, Gross Carrying Amount	$ 1,039.2	$ 733.7
Intangible assets, Accumulated Amortization	402.9	373.8
Intangible assets, Net Carrying Amount	636.3	359.9
Intangible assets not subject to amortization:
Trade name	98.1	52
FAA air agency certificates	8.7	8.7
Indefinite Lived Intangible Assets Net	106.8	60.7
Total intangible assets, Gross Carrying Amount	1,146	794.4
Total intangible assets, Net Carrying Amount	743.1	420.6
Customer Relationships [Member]
Intangible assets subject to amortization:
Intangible assets, Gross Carrying Amount	503.3	324.6
Intangible assets, Accumulated Amortization	119.1	103
Intangible assets, Net Carrying Amount	384.2	221.6
Technology-Based Intangible Assets [Member]
Intangible assets subject to amortization:
Intangible assets, Gross Carrying Amount	254	128.7
Intangible assets, Accumulated Amortization	39.3	33.8
Intangible assets, Net Carrying Amount	214.7	94.9
Trademarks [Member]
Intangible assets subject to amortization:
Intangible assets, Gross Carrying Amount	9.5	8.6
Intangible assets, Accumulated Amortization	4.7	4.3
Intangible assets, Net Carrying Amount	4.8	4.3
Computer Software, Intangible Asset [Member]
Intangible assets subject to amortization:
Intangible assets, Gross Carrying Amount	262.8	261.5
Intangible assets, Accumulated Amortization	233.9	226.5
Intangible assets, Net Carrying Amount	28.9	35
Unclassified Indefinite-lived Intangible Assets [Member]
Intangible assets subject to amortization:
Intangible assets, Gross Carrying Amount	9.6	10.3
Intangible assets, Accumulated Amortization	5.9	6.2
Intangible assets, Net Carrying Amount	$ 3.7	$ 4.1

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Goodwill [Line Items]
Goodwill	$ 965.4		$ 511.8
Goodwill, Purchase Accounting Adjustments	3.2
Goodwill and Other Intangible Assets (Textual) [Abstract]
Amortization expense for intangible assets	32.4	$ 29.2
Future Amortization Expense Year 2015	44.5
Future Amortization Expense Year 2016	51.9
Future Amortization Expense Year 2017	47.7
Future Amortization Expense Year 2018	44.2
Future Amortization Expense Year 2019	40.1
Goodwill, Acquired During Period	465
Goodwill, Written off Related to Sale of Business Unit	(5.1)
Goodwill, Other Increase (Decrease)	6.3
ABC Bearings [Member]
Goodwill and Other Intangible Assets (Textual) [Abstract]
Goodwill, Acquired During Period	19.4
Mobile Industries [Member]
Goodwill [Line Items]
Goodwill	259.2		254.3
Goodwill and Other Intangible Assets (Textual) [Abstract]
Goodwill, Acquired During Period	16.2
Goodwill, Written off Related to Sale of Business Unit	(5.1)
Goodwill, Other Increase (Decrease)	(6.2)
Mobile Industries [Member] | ICT Business [Member]
Goodwill and Other Intangible Assets (Textual) [Abstract]
Goodwill, Written off Related to Sale of Business Unit	(5.1)
Process Industries [Member]
Goodwill [Line Items]
Goodwill	706.2		$ 257.5
Goodwill and Other Intangible Assets (Textual) [Abstract]
Goodwill, Acquired During Period	448.8
Goodwill, Written off Related to Sale of Business Unit	0
Goodwill, Other Increase (Decrease)	$ (0.1)

Contingencies (Details)

Contingencies (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Accrual for Environmental Loss Contingencies	$ 5.6		$ 5
Product Warranty Expense	3.3	$ 2.7
Standard and Extended Product Warranty Accrual, Decrease for Payments	1.6	$ 3.8
Standard Product Warranty Accrual	$ 7.5		$ 5.8	$ 6.9

Financing Arrangements (Details

Financing Arrangements (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Short-term Debt [Line Items]
Short-term debt	$ 37	$ 105.4
Line of Credit Accounts Receivable Securitization [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Interest Rate at Period End	0.00%	2.15%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	3.05%
Short-term debt	$ 0	$ 62.9
Foreign Subsidiary [Member]
Short-term Debt [Line Items]
Line of Credit Stated Variable Interest Rate Low Range	0.33%	0.32%
Short-term debt	$ 37	$ 42.5
Euro Term Loan - Variable Rate [Member]
Short-term Debt [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	1.13%	1.13%
Senior Unsecured Notes - 3.875% [Member]
Short-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.875%
Debt Instrument, Maturity Date	Sep. 1, 2024
Series A Medium Term Note [Member]
Short-term Debt [Line Items]
Debt Instrument, Maturity Date	May 1, 2028
Series A Medium Term Note [Member] | Maximum [Member]
Short-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.76%
Series A Medium Term Note [Member] | Minimum [Member]
Short-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.74%
Euro Senior Unsecured Notes - 2.02% [Member]
Short-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.02%
Debt Instrument, Maturity Date	Sep. 7, 2027

Financing Arrangements (Detai_2

Financing Arrangements (Details 1) € in Millions, $ in Millions	Sep. 30, 2018EUR (€)	Sep. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Long-term debt
Total Long-term debt		$ 1,693.1	$ 856.9
Less current maturities		11.4	2.7
Long-term debt		$ 1,681.7	854.2
Senior Unsecured Notes - 3.875% [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.875%	3.875%
Euro Senior Unsecured Notes - 2.02% [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.02%	2.02%
Senior Unsecured Notes - 4.5% [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.50%	4.50%
Long-term debt
Total Long-term debt		$ 396	0
Other Long Term Debt [Member]
Long-term debt
Total Long-term debt		5.7	4.5
Euro Term Loan - Variable Rate [Member]
Long-term debt
Total Long-term debt	€ 93.5	$ 108.3	119.7
Euro Senior Unsecured Notes - 2.02% [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.02%	2.02%
Long-term debt
Total Long-term debt		$ 173.4	$ 179.3
Senior Unsecured Notes - Variable Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.43%	2.43%	1.83%
Line of Credit Facility, Remaining Borrowing Capacity		$ 434.8
Long-term debt
Total Long-term debt		65.2	$ 52
Senior Unsecured Notes - 3.875% [Member]
Long-term debt
Total Long-term debt		347.5	346.9
Series A Medium Term Note [Member]
Long-term debt
Total Long-term debt		$ 154.6	$ 154.5
Line of Credit Accounts Receivable Securitization [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End	0.00%	0.00%	2.15%
Line of Credit Facility, Remaining Borrowing Capacity		$ 6.8
Long-term debt
Total Long-term debt		93.2	$ 0
Term Loan - Variable Rate [Member]
Long-term debt
Total Long-term debt		$ 349.2	$ 0

Financing Arrangements (Detai_3

Financing Arrangements (Details Textual) € in Millions, $ in Millions	Sep. 11, 2018USD ($)	Sep. 06, 2018USD ($)	Sep. 18, 2017USD ($)	Sep. 07, 2017EUR (€)	Jul. 03, 2017	Sep. 30, 2018EUR (€)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Jan. 01, 2018USD ($)	Dec. 31, 2017USD ($)
Line of Credit Facility [Line Items]
Short-term Debt									$ 37		$ 105.4
Long-term Fixed-rate Debt, Carrying Value									1,073.6		682.4
Financing Arrangements (Textual) [Abstract]
Proceeds from Issuance of Long-term Debt							$ 1,286.1	$ 862.7
Line of Credit Facility, Fair Value of Amount Outstanding									1,693.1		856.9
Accounts Receivable, Net, Current									$ 548.6	$ 457.6	$ 524.9
Euro Term Loan - Variable Rate [Member]
Financing Arrangements (Textual) [Abstract]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate						1.13%			1.13%		1.13%
Euro Senior Unsecured Notes - 2.02% [Member]
Financing Arrangements (Textual) [Abstract]
Debt Instrument, Interest rate						2.02%			2.02%
Debt Instrument, Maturity Date						Sep. 7, 2027	Sep. 7, 2027
Senior Unsecured Notes - 3.875% [Member]
Financing Arrangements (Textual) [Abstract]
Debt Instrument, Interest rate						3.875%			3.875%
Debt Instrument, Maturity Date						Sep. 1, 2024	Sep. 1, 2024
Series A Medium Term Note [Member]
Financing Arrangements (Textual) [Abstract]
Debt Instrument, Maturity Date						May 1, 2028	May 1, 2028
Groeneveld [Member]
Financing Arrangements (Textual) [Abstract]
Business Acquisition, Effective Date of Acquisition					Jul. 3, 2017
Senior Unsecured Notes - 4.5% [Member]
Financing Arrangements (Textual) [Abstract]
Debt Instrument, Issuance Date		Sep. 6, 2018
Proceeds from Issuance of Long-term Debt		$ 400
Line of Credit Facility, Fair Value of Amount Outstanding									$ 396		$ 0
Debt Instrument, Interest rate						4.50%			4.50%
Debt Instrument, Maturity Date		Dec. 15, 2028				Dec. 15, 2018	Dec. 15, 2018
Euro Term Loan - Variable Rate [Member]
Financing Arrangements (Textual) [Abstract]
Debt Instrument, Issuance Date			Sep. 18, 2017
Proceeds from Issuance of Long-term Debt			$ 100
Line of Credit Facility, Fair Value of Amount Outstanding						€ 93.5			$ 108.3		119.7
Debt Instrument, Maturity Date			Sep. 18, 2020
Repayments of Long-term Lines of Credit | €						€ 6.5
Euro Senior Unsecured Notes - 2.02% [Member]
Financing Arrangements (Textual) [Abstract]
Debt Instrument, Issuance Date				Sep. 7, 2017
Proceeds from Issuance of Long-term Debt | €				€ 150
Line of Credit Facility, Fair Value of Amount Outstanding									$ 173.4		179.3
Debt Instrument, Interest rate						2.02%			2.02%
Debt Instrument, Maturity Date				Sep. 7, 2027
Senior Unsecured Notes - Variable Rate [Member]
Financing Arrangements (Textual) [Abstract]
Maximum borrowing capacity under line of credit									$ 500
Remaining Borrowing Capacity under Line of Credit Facility of Company's foreign subsidiaries									434.8
Line of credit expiration date						Jun. 19, 2020	Jun. 19, 2020
Line of Credit Facility, Fair Value of Amount Outstanding									$ 65.2		$ 52
Debt Instrument, Interest rate						2.43%			2.43%		1.83%
Foreign Subsidiary [Member]
Line of Credit Facility [Line Items]
Short-term Debt									$ 37		$ 42.5
Financing Arrangements (Textual) [Abstract]
Maximum borrowing capacity under line of credit									284.5
Borrowings guarantees									0.5
Remaining Borrowing Capacity under Line of Credit Facility of Company's foreign subsidiaries									$ 247
Line of Credit stated variable interest rate, High Range						9.45%			9.45%		2.22%
Line of Credit Accounts Receivable Securitization [Member]
Line of Credit Facility [Line Items]
Short-term Debt									$ 0		$ 62.9
Financing Arrangements (Textual) [Abstract]
Maximum borrowing capacity under line of credit									100
Remaining Borrowing Capacity under Line of Credit Facility of Company's foreign subsidiaries									6.8
Line of credit expiration date						Nov. 30, 2021	Nov. 30, 2021
Line of Credit Facility, Fair Value of Amount Outstanding									$ 93.2		0
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate						3.05%			3.05%
Term Loan - Variable Rate [Member]
Financing Arrangements (Textual) [Abstract]
Debt Instrument, Issuance Date	Sep. 11, 2018
Proceeds from Issuance of Long-term Debt	$ 350
Line of Credit Facility, Fair Value of Amount Outstanding									$ 349.2		$ 0
Debt Instrument, Maturity Date	Sep. 11, 2023
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate						3.38%			3.38%
Minimum [Member] | Series A Medium Term Note [Member]
Financing Arrangements (Textual) [Abstract]
Debt Instrument, Interest rate						6.74%			6.74%
Maximum [Member] | Series A Medium Term Note [Member]
Financing Arrangements (Textual) [Abstract]
Debt Instrument, Interest rate						7.76%			7.76%

Equity (Details)

Equity (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Common Stock, Value, Outstanding	$ 53.1		$ 53.1				$ 53.1
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(0.4)	$ (2)	4	$ (4.2)
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	66		66
Treasury Stock, Value	(924.9)		(924.9)				(884.3)
Stockholders' Equity Attributable to Noncontrolling Interest	60.5		60.5				32.2
Shareholding pattern
Beginning Balance			1,474.9
Net income	72.3	54.1	244.7	174.2
Net (loss) income attributable to noncontrolling interest	0.7	0.6	1.9	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(24.2)	10.9	(62.5)	42.8
Net Income (Loss) Attributable to Parent	71.6	53.5	242.8	174.2
Pension and postretirement liability adjustment (net of the income tax benefit of $1.5 million)	0	0.1	0	0.2
Dividends - $0.26 per share			(64.2)
Stock-based compensation expense			25.5
Payments for Repurchase of Common Stock			(63)	(41)
Stock option exercise activity			(12.7)
Restricted shares surrendered (issued)			0
Payments Related to Tax Withholding for Share-based Compensation			5.4	10.8
Ending Balance	1,640.4		1,640.4
Additional Paid in Capital, Common Stock	945.1		945.1				903.8
Retained Earnings (Accumulated Deficit)	1,595.4		1,595.4			$ 1,416.1	1,408.4
Accumulated Other Comprehensive Income (Loss), Net of Tax	(88.8)	$ (41)	(88.8)	$ (41)	$ (69.9)		(38.3)	$ (50.1)	$ (77.9)
Other Paid-In Capital [Member]
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	30.9		30.9
Shareholding pattern
Stock-based compensation expense			25.5
Stock option exercise activity			(3.7)
Restricted shares surrendered (issued)			(11.4)
Earnings Invested in the Business [Member]
Shareholding pattern
Dividends - $0.26 per share			(64.2)
Accumulated Other Comprehensive (Loss) [Member]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			4
Shareholding pattern
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax			(53.8)
Treasury Stock [Member]
Shareholding pattern
Payments for Repurchase of Common Stock			(63)
Stock option exercise activity			(16.4)
Restricted shares surrendered (issued)			11.4
Payments Related to Tax Withholding for Share-based Compensation			5.4
Noncontrolling Interest [Member]
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	35.1		35.1
Shareholding pattern
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax			(8.7)
Accounting Standards Update 2014-09 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	7.7		7.7
Accounting Standards Update 2014-09 [Member] | Earnings Invested in the Business [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	7.7		7.7
Accounting Standard Update 2018-02 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	0		0
Shareholding pattern
Accumulated Other Comprehensive Income (Loss), Net of Tax							$ (39)
Accounting Standard Update 2018-02 [Member] | Earnings Invested in the Business [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	0.7		0.7
Accounting Standard Update 2018-02 [Member] | Accumulated Other Comprehensive (Loss) [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ (0.7)		$ (0.7)

Equity (Details Textual)

Equity (Details Textual) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Class of Stock [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	$ 66		$ 66
Sale of Stock, Percentage of Ownership before Transaction			75.00%
Sale of Stock, Percentage of Ownership after Transaction			67.80%
Equity (Textual) [Abstract]
Dividend per share	$ 0.28	$ 0.27	$ 0.83	$ 0.80
Timken India [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, Acquisitions			7.2
Accounting Standards Update 2014-09 [Member]
Class of Stock [Line Items]
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle			$ 2.6

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	$ (23.2)	$ 6.9	$ (57.5)	$ 35.7
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(1.5)	1	0.3	0.7
Net Income (Loss) Attributable to Parent	0.1	1.1	(1.3)	2.4
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(69.9)	(50.1)	(38.3)	(77.9)
Net current period other comprehensive (loss) income, net of income taxes	(24.6)	9	(58.5)	38.8
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	5.7	0.1	8.7	(1.9)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(18.9)	9.1	(50.5)	36.9
Ending Balance	(88.8)	(41)	(88.8)	(41)
Foreign currency translation adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(24.2)	10.9	(62.5)	42.8
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0	0	0	0
Net Income (Loss) Attributable to Parent	0	0	0	0
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(70.4)	(49.9)	(35.1)	(79.8)
Net current period other comprehensive (loss) income, net of income taxes	(24.2)	10.9	(62.5)	42.8
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	5.7	0.1	8.7	(1.9)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(18.5)	11	(53.8)	40.9
Ending Balance	(88.9)	(38.9)	(88.9)	(38.9)
Pension and postretirement liability adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	0	0	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0	0.1	0	0.3
Net Income (Loss) Attributable to Parent	0	0	0	(0.1)
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(0.4)	1.6	(0.3)	1.5
Net current period other comprehensive (loss) income, net of income taxes	0	0.1	0	0.2
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	0	0	0	0
Accumulated Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0	0.1	(0.1)	0.2
Ending Balance	(0.4)	1.7	(0.4)	1.7
Derivative financial instruments fair value adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	1	(4)	5	(7.1)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(1.5)	0.9	0.3	0.4
Net Income (Loss) Attributable to Parent	0.1	1.1	(1.3)	2.5
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	0.9	(1.8)	(2.9)	0.4
Net current period other comprehensive (loss) income, net of income taxes	(0.4)	(2)	4	(4.2)
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	0	0	0	0
Accumulated Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(0.4)	(2)	3.4	(4.2)
Ending Balance	$ 0.5	$ (3.8)	0.5	$ (3.8)
Accounting Standard Update 2018-02 [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance			(39)
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle			(0.7)
Accounting Standard Update 2018-02 [Member] | Foreign currency translation adjustment [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance			(35.1)
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle			0
Accounting Standard Update 2018-02 [Member] | Pension and postretirement liability adjustment [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance			(0.4)
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle			(0.1)
Accounting Standard Update 2018-02 [Member] | Derivative financial instruments fair value adjustment [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance			(3.5)
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle			$ (0.6)

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net Income (Loss) Attributable to Parent	$ 71.6	$ 53.5	$ 242.8	$ 174.2
Less Undistributed Earnings (Loss) Allocated to Nonvested Stock	$ 0	$ 0	$ 0	$ 0
Denominator:
Weighted Average Number of Shares Outstanding, Basic	76,903,395	77,694,974	77,332,209	77,766,828
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	1,524,710	1,109,322	1,313,294	1,123,102
Weighted average number of shares outstanding, assuming dilution of stock options and awards	78,428,105	78,804,296	78,645,503	78,889,930
Basic earnings per share	$ 0.93	$ 0.69	$ 3.14	$ 2.24
Diluted earnings per share	$ 0.91	$ 0.68	$ 3.09	$ 2.21

Earnings Per Share (Details Tex

Earnings Per Share (Details Textual) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share (Textual) [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	923,588	473,694	852,318	529,020

Revenue Disaggregation of Reven

Revenue Disaggregation of Revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 881,300,000	$ 771,400,000	$ 2,670,700,000	$ 2,225,800,000
Unbilled Receivables, Current	(137,300,000)		(137,300,000)		$ (100,500,000)	$ 0
Increase (Decrease) in Cost in Excess of Billing on Uncompleted Contract			229,100,000
Contract with Customer, Asset, Reclassified to Receivable			192,300,000
Revenue, Remaining Performance Obligation, Amount	146,000,000		146,000,000
U.S. Government [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0.07
Sales Channel, Directly to Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0.58
Sales Channel, Through Intermediary [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0.42
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0.09
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	448,200,000	394,600,000	1,335,900,000	1,197,200,000
Canada Mexico and South America [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	94,500,000	85,600,000	292,300,000	243,300,000
EMEA [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	175,300,000	154,900,000	558,900,000	410,500,000
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	163,300,000	136,300,000	483,600,000	374,800,000
Mobile Industries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	464,200,000	422,800,000	1,441,800,000	1,214,200,000
Mobile Industries [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	255,300,000	231,600,000	774,400,000	707,200,000
Mobile Industries [Member] | Canada Mexico and South America [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	51,600,000	48,100,000	160,300,000	133,300,000
Mobile Industries [Member] | EMEA [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	89,300,000	84,200,000	292,500,000	213,800,000
Mobile Industries [Member] | Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	68,000,000	58,900,000	214,600,000	159,900,000
Process Industries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	417,100,000	348,600,000	1,228,900,000	1,011,600,000
Process Industries [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	192,900,000	163,000,000	561,500,000	490,000,000
Process Industries [Member] | Canada Mexico and South America [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	42,900,000	37,500,000	132,000,000	110,000,000
Process Industries [Member] | EMEA [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	86,000,000	70,700,000	266,400,000	196,700,000
Process Industries [Member] | Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 95,300,000	$ 77,400,000	269,000,000	$ 214,900,000
Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			$ 0.02

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 881.3	$ 771.4	$ 2,670.7	$ 2,225.8
Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit	(5.3)	0	(3.1)	(4.4)
Segment EBIT:
Total EBIT for reportable segments	132.4	96.7	410.2	268
Unallocated corporate expenses	(17.9)	(12.1)	(47.2)	(36.4)
Interest expense	(12.5)	(10.1)	(33.2)	(26.5)
Investment Income, Interest	0.6	0.7	1.5	2
Income (Loss) Before Income Taxes	97.3	75.2	328.2	202.7
Mobile Industries [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	464.2	422.8	1,441.8	1,214.2
Segment EBIT:
Total EBIT for reportable segments	50.6	35	156.2	102
Process Industries [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	417.1	348.6	1,228.9	1,011.6
Segment EBIT:
Total EBIT for reportable segments	$ 81.8	$ 61.7	$ 254	$ 166

Retirement Benefit Plans (Detai

Retirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Components of net periodic benefit cost:
Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit	$ 5.3	$ 0	$ 3.1	$ 4.4
Pension Plan [Member]
Components of net periodic benefit cost:
Service cost	3.7	3.5	10.9	10.4
Interest cost	7.8	8.1	23.2	24.1
Expected return on plan assets	(10.5)	(9.9)	(31)	(29.3)
Amortization of prior service cost	0.5	0.4	1.3	1.1
Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit	4.8	0	2.4	4.4
Net periodic benefit cost	6.3	2.1	6.8	10.7
Pension Plan [Member] | Foreign Plan [Member]
Components of net periodic benefit cost:
Service cost	0.4	0.4	1.2	1.2
Interest cost	1.8	1.9	5.5	5.6
Expected return on plan assets	(2.9)	(2.9)	(8.8)	(8.3)
Amortization of prior service cost	0.1	0.1	0.1	0.1
Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit	0	0	0	0
Net periodic benefit cost	(0.6)	(0.5)	(2)	(1.4)
Pension Plan [Member] | Domestic Plan [Member]
Components of net periodic benefit cost:
Service cost	3.3	3.1	9.7	9.2
Interest cost	6	6.2	17.7	18.5
Expected return on plan assets	(7.6)	(7)	(22.2)	(21)
Amortization of prior service cost	0.4	0.3	1.2	1
Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit	4.8	0	2.4	4.4
Net periodic benefit cost	$ 6.9	$ 2.6	$ 8.8	$ 12.1

Postretirement Benefit Plans (D

Postretirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 3.7	$ 3.5	$ 10.9	$ 10.4
Defined Benefit Plan, Interest Cost	7.8	8.1	23.2	24.1
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	10.5	9.9	31	29.3
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.5	0.4	1.3	1.1
Net periodic benefit cost	6.3	2.1	6.8	10.7
Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	0	0	0.1	0.1
Defined Benefit Plan, Interest Cost	1.9	2.3	5.6	6.8
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0.9	1.4	2.8	4.2
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(0.4)	(0.3)	(1.2)	(0.8)
Net periodic benefit cost	0.6	0.6	1.7	1.9
Foreign Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	0.4	0.4	1.2	1.2
Defined Benefit Plan, Interest Cost	1.8	1.9	5.5	5.6
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	2.9	2.9	8.8	8.3
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.1	0.1	0.1	0.1
Net periodic benefit cost	(0.6)	(0.5)	(2)	(1.4)
Domestic Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	3.3	3.1	9.7	9.2
Defined Benefit Plan, Interest Cost	6	6.2	17.7	18.5
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	7.6	7	22.2	21
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.4	0.3	1.2	1
Net periodic benefit cost	$ 6.9	$ 2.6	$ 8.8	$ 12.1

Income Taxes (Details Textual)

Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Excluding discrete items [Line Items]
Provision (benefit) for income taxes	$ 25	$ 21.1	$ 83.5	$ 28.5
Effective Income Tax Rate Reconciliation, Percent	25.70%	28.10%	25.40%	14.10%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent				35.00%
Tax on Unremitted Foreign Earnings					$ 25.2
Deferred Income Tax Expense (Benefit)			$ 2.2	$ 7.5
The Tax Cut and Jobs Act of 2018 [Member]
Excluding discrete items [Line Items]
Deferred Income Tax Expense (Benefit)					$ 10.1
Restatement Adjustment [Member]
Excluding discrete items [Line Items]
Income Tax Examination, Increase (Decrease) in Liability from Prior Year			1.9
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount			$ 2.5

Fair Value (Details)

Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	$ 21.3	$ 13.1
Restricted cash	1.3	3.8	$ 3.3
Short-term investments	0.1	0.2
Foreign currency hedges	6.3	1.3
Foreign currency hedges	1.1	7.1
Fair Value, Measurements, Recurring [Member]
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	132.4	108.5
Restricted cash	1.3	3.8
Short-term investments	16.5	16.2
Foreign currency hedges	6.3	1.3
Total Assets	177.9	143.1
Foreign currency hedges	1.1	7.1
Total Liabilities	1.1	7.1
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	130.9	107.3
Restricted cash	1.3	3.8
Short-term investments	2.1	0
Foreign currency hedges	0	0
Total Assets	134.3	111.1
Foreign currency hedges	0	0
Total Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	1.5	1.2
Restricted cash	0	0
Short-term investments	14.4	16.2
Foreign currency hedges	6.3	1.3
Total Assets	22.2	18.7
Foreign currency hedges	1.1	7.1
Total Liabilities	1.1	7.1
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Restricted cash	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 ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt, Fair Value	$ 1,080.2	$ 720.3
Long-term Fixed-rate Debt, Carrying Value	$ 1,073.6	$ 682.4

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Foreign Currency Cash Flow Hedge Asset at Fair Value	$ 3.4		$ 3.4		$ 0.5
Derivative, Notional Amount	347.6		347.6		386.9
Foreign Currency Cash Flow Hedge Liability at Fair Value	0.3		0.3		2.1
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	2.9		2.9		0.8
Derivative Asset	6.3		6.3		1.3
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	0.8		0.8		5
Derivative Liability	1.1		1.1		$ 7.1
Unrealized Gain on Foreign Currency Derivatives, before Tax	1	$ 1.6	5	$ 4.7
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	1.6	(0.9)	0.2	(0.2)
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	(0.1)	0	(0.5)	(0.2)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1.5	(0.9)	(0.3)	(0.4)
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	(0.8)	2.7	6.4	5.6
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	0	(2.4)	0	(2.4)
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ 1	$ 4	$ 5	$ (7.1)