Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net Income	$ 107.2	$ 61.8	$ 223.2	$ 145.8
Other comprehensive income, net of tax:
Foreign currency translation adjustments	23.2	24.5	(21.2)	(54.3)
Pension and postretirement liability adjustments	(1.7)	(1.5)	(3.3)	(2.8)
Change in fair value of marketable securities		0.5		0.1
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(0.2)	(2.6)	2.0	1.6
Other comprehensive income (loss), net of tax	21.3	20.9	(22.5)	(55.4)
Comprehensive Income, net of tax	128.5	82.7	200.7	90.4
Less: comprehensive income (loss) attributable to noncontrolling interest	1.8	1.1	4.1	(3.1)
Comprehensive Income Attributable to The Timken Company	$ 126.7	$ 81.6	$ 196.6	$ 93.5