Continued Dumping and Subsidy Act (Details Textual) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016
CDSOA [Abstract]
Continued Dumping & Subsidy Offset Act (CDSOA) receipts, net of expense	$ 0	$ (200,000)	$ 0	$ 53,600,000
Continued Dumping and Subsidy Offset Act, distributions					$ 6,300,000	$ 48,100,000

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

No definition available.

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