Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net sales	$ 3,513.2	$ 3,789.9	$ 3,580.8
Cost of products sold	2,503.3	2,648.1	2,540.7
Gross Profit	1,009.9	1,141.8	1,040.1
Selling, general and administrative expenses	533.8	618.6	580.7
Impairment and restructuring charges	21.2	6.8	4.9
Operating Income	454.9	516.4	454.5
Interest expense	(67.6)	(72.1)	(51.7)
Interest income	3.7	4.9	2.1
Non-service pension and other postretirement (expense) income	(4.7)	10.2	(6.2)
Other income, net	10.0	13.0	9.4
Income Before Income Taxes	396.3	472.4	408.1
Provision for income taxes	103.9	97.7	102.6
Net Income	292.4	374.7	305.5
Less: Net income attributable to noncontrolling interest	7.9	12.6	2.7
Net Income Attributable to The Timken Company	$ 284.5	$ 362.1	$ 302.8
Net Income per Common Share Attributable to The Timken Company Common Shareholders
Basic earnings per share (in dollars per share)	$ 3.78	$ 4.78	$ 3.93
Diluted earnings per share (in dollars per share)	$ 3.72	$ 4.71	$ 3.86