Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net Income	$ 116.0	$ 84.0
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(44.4)	(78.8)
Pension and postretirement liability adjustments	(1.6)	(1.3)
Change in fair value of marketable securities		(0.4)
Change in fair value of derivative financial instruments, net of reclassifications	2.2	4.2
Other comprehensive loss, net of tax	(43.8)	(76.3)
Comprehensive Income, net of tax	72.2	7.7
Less: comprehensive income (loss) attributable to noncontrolling interest	2.3	(4.2)
Comprehensive Income Attributable to The Timken Company	$ 69.9	$ 11.9