Earnings Per Share - Denominator of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net income attributable to The Timken Company	$ 122.3	$ 118.2
Denominator:
Weighted-average number of shares outstanding - basic (in shares)	72,499,928	74,782,153
Effect of dilutive securities:
Stock options and awards - based on the treasury stock method (in shares)	860,926	763,512
Weighted-average number of shares outstanding, assuming dilution of stock options and awards (in shares)	73,360,854	75,545,665
Basic earnings per share (in dollars per share)	$ 1.69	$ 1.58
Diluted earnings per share (in dollars per share)	$ 1.67	$ 1.56