Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Activities
Net income attributable to The Timken Company	$ 203.4	$ 140.8	$ 188.6
Net (loss) income attributable to noncontrolling interest	(1.1)	0.3	2.8
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	137.7	131.7	130.8
Impairment charges	(0.1)	(3.9)	(3.3)
(Gain) loss on sale of assets	(2.1)	1.6	11.8
Gain (Loss) on Disposition of Business	0.0	0.0	(28.7)
Deferred income tax provision (benefit)	0.4	15.0	22.2
Stock-based compensation expense	24.7	14.1	18.4
Pension and other postretirement expense	(28.9)	(84.0)	(95.3)
Pension and other postretirement benefit contributions	(23.9)	(24.7)	(29.8)
Changes in operating assets and liabilities:
Accounts receivable	(42.3)	20.3	11.9
Inventories	(132.1)	10.1	53.1
Accounts payable, trade	70.7	12.2	11.6
Other accrued expenses	36.3	(2.8)	(47.7)
Income taxes	(36.2)	23.5	(40.4)
Other, net	(26.9)	3.9	21.5
Net Cash Provided by Operating Activities	236.8	403.9	380.3
Investing Activities
Capital expenditures	(104.7)	(137.5)	(105.6)
Acquisitions, net of cash acquired of $35.0 million in 2017, $2.5 million in 2016 and $0.1 million in 2015	(346.8)	(72.6)	(213.3)
Proceeds from disposals of property, plant and equipment	7.1	1.5	9.8
Proceeds from Divestiture of Businesses, Net of Cash Divested	0.0	0.0	46.2
Payments to Acquire Marketable Securities	3.6	2.6	1.8
Other	(0.7)	0.2	(0.5)
Net Cash Used in Investing Activities	(448.7)	(211.0)	(265.2)
Financing Activities
Cash dividends paid to shareholders	(83.3)	(81.6)	(87.0)
Purchase of treasury shares	(43.4)	(101.0)	(309.7)
Proceeds from exercise of stock options	32.9	4.3	4.1
Payments Related to Tax Withholding for Share-based Compensation	(11.4)	(1.9)	(4.0)
Proceeds from issuance of long-term debt	927.8	340.5	265.7
Repayments of Long-term Debt	684.5	345.3	190.6
Deferred financing costs	(1.2)	0.0	(2.0)
Proceeds from Accounts Receivable Securitization	56.7	50.0	116.0
Repayments of Accounts Receivable Securitization	(42.7)	(50.1)	(67.0)
Short-term debt activity, net	19.9	7.2	6.0
Increase (Decrease) in Restricted Cash	(1.2)	(2.5)	14.8
Other	2.6	(9.1)	(6.6)
Net Cash Provided by (Used in) Financing Activities	167.0	(171.3)	(247.1)
Effect of exchange rate changes on cash	17.7	(2.4)	(17.2)
(Decrease) increase In Cash and Cash Equivalents	(27.2)	19.2	(149.2)
Cash and cash equivalents at beginning of year	148.8	129.6	278.8
Cash and Cash Equivalents at End of Year	$ 121.6	$ 148.8	$ 129.6