Continued Dumping and Subsidy Act (Details Textual) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CDSOA [Abstract]
Continued Dumping & Subsidy Offset Act (CDSOA) receipts, net of expense	$ 0.0	$ 0.0	$ 59.6
Continued Dumping and Subsidy Offset Act, distributions			$ 60.6

Receipt Of Continued Dumping And Subsidy Offset Act Payment Net Of Expenses

No definition available.

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Namespace Prefix:	tkr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration