Number of common shares of the Timken Company received during the spinoff.

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Number of common shares received of TimkenSteel during the Spinoff.

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Estimated Forfeitures of Stock Options for the period.

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Percentage of vest increments of Stock option awards.

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Restricted deferred shares and deferred dividend credits. Awarded during the period and have not vested.

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Shares Expected to Settle in Cash

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Shares Expected to Settle in Cash, Amount Accrued

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Shares Expected to Settle in Shares

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Share based compensation plans.

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Share based compensation plans.

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Shares distributed due to vesting of restricted, deferred shares and deferred dividend credits.

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Stock-based compensation expense diluted share.

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Vest in percentage increments of restricted shares.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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-Publisher FASB
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-Topic 718
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The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Stock Compensation Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share Based Compensation Plans (Additional Textual) [Abstract]
Expected life - years		5 years	5 years	6 years
Total intrinsic value of options exercised		$ 5.6	$ 21.5	$ 25.2
Recognized Stock-based compensation expense before tax		6.6	13.7	12.1
Amount accrued for shares settling in cash		$ 6.1	15.3
Share Based Compensation Plans (Textual) [Abstract]
Percentage of vest increments of Stock option awards		25.00%
Recognized Stock-based compensation expense after tax		$ 4.1	$ 8.5	$ 7.6
Recognized Stock-based compensation expense diluted share		$ 0.05	$ 0.09	$ 0.08
Estimated forfeitures		2.30%
Net cash proceeds from the exercise of stock options		$ 4.1	$ 16.8	$ 13.1
Income tax benefits		$ 1.3	$ 5.9	$ 8.9
Restricted deferred shares and deferred dividend credits			1,014,770
Shares distributed		103,953	171,135	221,542
Number of shares available for future grants for all plans		8,285,028
Unrecognized compensation expense is expected to be recognized over a total weighted average period		2 years
Common Shares of TimkenSteel Received in Spinoff	1
Common Shares of The Timken Company Received During Spinoff	2
Stock Options [Member]
Share Based Compensation Plans (Additional Textual) [Abstract]
Expected life - years		10 years
Restricted deferred shares and deferred dividend awarded [Member]
Share Based Compensation Plans (Additional Textual) [Abstract]
Shares awarded		485,975	520,912	111,640
Restricted Stock [Member]
Share Based Compensation Plans (Additional Textual) [Abstract]
Canceled or expired, Number of Shares		54,282
Shares awarded		485,975
Unrecognized Compensation expense related to stock option awards, restricted shares and deferred shares		$ 28.7
Recognized Stock-based compensation expense before tax		$ 11.8	$ 10.1	$ 6.5
Strategic Performance Shares [Member]
Share Based Compensation Plans (Additional Textual) [Abstract]
Shares awarded		288,585
Vesting period		3 years
Shares expected to settle in cash		8,580
Shares expected to settle in shares		280,005
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Plans (Additional Textual) [Abstract]
Shares awarded		211,980
Shares expected to settle in cash		6,010
Shares expected to settle in shares		205,970
Share Based Compensation Plans (Textual) [Abstract]
Vest in percentage increments of restricted shares		25.00%
Maximum [Member] \| Restricted Stock Units (RSUs) [Member]
Share Based Compensation Plans (Additional Textual) [Abstract]
Vesting period		5 years