Earnings Per Share - Denominator of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net income attributable to The Timken Company	$ 105.0	$ 104.8	$ 223.2	$ 218.1
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	$ 105.0	$ 104.8	$ 223.2	$ 218.1
Denominator:
Weighted-average number of shares outstanding - basic (in shares)	73,660,410	76,122,257	74,234,300	75,969,569
Effect of dilutive securities:
Stock options and awards - based on the treasury stock method (in shares)	522,383	1,131,900	642,948	1,288,192
Weighted-average number of shares outstanding, assuming dilution of stock options and awards (in shares)	74,182,793	77,254,157	74,877,248	77,257,761
Basic earnings per share (in dollars per share)	$ 1.43	$ 1.38	$ 3.01	$ 2.87
Diluted earnings per share (in dollars per share)	$ 1.42	$ 1.36	$ 2.98	$ 2.82