Earnings Per Share - Denominator of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net income attributable to The Timken Company	$ 97.2	$ 87.0	$ 105.0	$ 118.2	$ 62.9	$ 88.1	$ 104.8	$ 113.3	$ 407.4	$ 369.1	$ 284.5
Less: undistributed earnings allocated to nonvested stock									0.0	0.0	0.0
Net income available to common shareholders for basic and diluted earnings per share									$ 407.4	$ 369.1	$ 284.5
Denominator:
Weighted-average number of shares outstanding - basic (in shares)									73,602,247	75,885,316	75,324,280
Effect of dilutive securities:
Stock options and awards - based on the treasury stock method (in shares)									721,592	1,121,273	1,047,086
Weighted-average number of shares outstanding, assuming dilution of stock options and awards (in shares)									74,323,839	77,006,589	76,371,366
Basic earnings per share (in dollars per share)	$ 1.34	$ 1.19	$ 1.43	$ 1.58	$ 0.83	$ 1.16	$ 1.38	$ 1.49	$ 5.54	$ 4.86	$ 3.78
Diluted earnings per share (in dollars per share)	$ 1.32	$ 1.18	$ 1.42	$ 1.56	$ 0.82	$ 1.14	$ 1.36	$ 1.47	$ 5.48	$ 4.79	$ 3.72