Earnings Per Share (Tables)

6 Months Ended

Jun. 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 six months ended June 30, 2018 and 2017, respectively:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Numerator:
Net income attributable to The Timken Company	$	91.0	$	82.5	$	171.2	$	120.7
Less: undistributed earnings allocated to nonvested stock	—		—		—		—
Net income available to common shareholders for basic and diluted earnings per share	$	91.0	$	82.5	$	171.2	$	120.7
Denominator:
Weighted average number of shares outstanding - basic	77,360,159		77,931,576		77,544,365		77,814,438
Effect of dilutive securities:
Stock options and awards - based on the treasury stock method	1,136,139		1,097,821		1,207,586		1,129,991
Weighted average number of shares outstanding, assuming   dilution of stock options and awards	78,496,298		79,029,397		78,751,951		78,944,429
Basic earnings per share	$	1.18	$	1.06	$	2.21	$	1.55
Diluted earnings per share	$	1.16	$	1.04	$	2.17	$	1.53