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Earnings Per Share (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Numerator:
Net Income Attributable to The Timken Company	$ 82.8	$ 183.6	$ 157.9	$ 339.3
Less: undistributed earnings allocated to nonvested stock	0.1	0.6	0.2	1.2
Net income available to common shareholders for basic earnings per share and diluted earnings per share	$ 82.7	$ 183.0	$ 157.7	$ 338.1
Denominator:
Weighted average number of shares outstanding, basic	95,695,015	97,265,627	95,732,984	97,355,740
Effect of dilutive securities:
Stock options and awards based on the treasury stock method	854,106	938,578	914,570	1,017,617
Weighted average number of shares outstanding, assuming dilution of stock options and awards	96,549,121	98,204,205	96,647,554	98,373,357
Basic earnings per share	$ 0.86	$ 1.88	$ 1.64	$ 3.47
Diluted earnings per share	$ 0.86	$ 1.86	$ 1.63	$ 3.44

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