Earnings Per Share - Denominator of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net income attributable to The Timken Company	$ 87.0	$ 88.1	$ 310.2	$ 306.2
Less: undistributed earnings allocated to nonvested stock	0.0	0.0	0.0	0.0
Net income available to common shareholders for basic and diluted earnings per share	$ 87.0	$ 88.1	$ 310.2	$ 306.2
Denominator:
Weighted-average number of shares outstanding - basic (in shares)	73,177,956	76,068,582	73,890,483	75,980,355
Effect of dilutive securities:
Stock options and awards - based on the treasury stock method (in shares)	688,787	955,391	658,228	1,177,259
Weighted-average number of shares outstanding, assuming dilution of stock options and awards (in shares)	73,866,743	77,023,973	74,548,711	77,157,614
Basic earnings per share (in dollars per share)	$ 1.19	$ 1.16	$ 4.20	$ 4.03
Diluted earnings per share (in dollars per share)	$ 1.18	$ 1.14	$ 4.16	$ 3.97