Tennant (TNC) 10-Q 29 Oct 20 2020 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2020	Oct. 23, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	1-16191
Entity Registrant Name	TENNANT COMPANY
Entity Central Index Key	0000097134
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Incorporation, State or Country Code	MN
Entity Tax Identification Number	41-0572550
Entity Address, Address Line One	10400 Clean Street
Entity Address, City or Town	Eden Prairie
Entity Address, State or Province	MN
Entity Address, Postal Zip Code	55344
City Area Code	763
Local Phone Number	540-1200
Title of 12(b) Security	Common Stock, par value $0.375 per share
Trading Symbol	TNC
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		18,473,188

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net Earnings Including Noncontrolling Interest	$ 11.7	$ 14.6	$ 31.2	$ 34.8
Other Comprehensive (Loss) Income:
Foreign currency translation adjustments	12.1	(12.6)	4.6	(13.5)
Cash flow hedge	(0.8)	1.7	3.5	4.3
Income Taxes:
Foreign currency translation adjustments	0.3	0.1	(1)	0.1
Cash flow hedge	0.2	(0.4)	0.8	(1)
Total Other Comprehensive (Loss) Income, net of tax	11.8	(11.2)	8.3	(10.1)
Total Comprehensive Income Including Noncontrolling Interest	23.5	3.4	39.5	24.7
Comprehensive Income Attributable to Tennant Company	$ 23.5	$ 3.4	$ 39.5	$ 24.7

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues	$ 261.9	$ 280.7	$ 728	$ 842.8
Cost of Sales	(157.1)	(166.7)	(428.5)	(499.8)
Gross Profit	104.8	114	299.5	343
Operating Expense:
Research and Development Expense	7.4	8.2	21.4	23.8
Selling and Administrative Expense	79	84.3	222.4	267
Total Operating Expense	86.4	92.5	243.8	290.8
Profit from Operations	18.4	21.5	55.7	52.2
Other Income (Expense):
Interest Income	0.8	0.8	2.5	2.5
Interest Expense	(5.2)	(5.2)	(15.9)	(15.7)
Net Foreign Currency Transaction Losses	(0.9)	(0.6)	(5)	(0.6)
Other Income (Expense), Net	(0.2)	0.1	(0.2)	1.4
Total Other Expense, Net	(5.5)	(4.9)	(18.6)	(12.4)
Profit Before Income Taxes	12.9	16.6	37.1	39.8
Income Tax Expense	1.2	2	5.9	5
Net Earnings Including Noncontrolling Interest	11.7	14.6	31.2	34.8
Net Earnings Attributable to Tennant Company	$ 11.7	$ 14.6	$ 31.2	$ 34.8
Net Earnings (Loss) Attributable to Tennant Company per Share:
Basic	$ 0.64	$ 0.81	$ 1.70	$ 1.93
Diluted	$ 0.63	$ 0.79	$ 1.68	$ 1.89
Weighted Average Shares Outstanding:
Basic	18,371,883	18,134,909	18,335,430	18,086,962
Diluted	18,648,328	18,487,948	18,623,967	18,402,929

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current Assets:
Cash, Cash Equivalents and Restricted Cash	$ 124.7	$ 74.6
Receivables [Abstract]
Trade, less Allowances of $3.2 and $2.5, respectively	198	216.5
Other	3.3	6.8
Net Receivables	201.3	223.3
Inventories	133.5	150.1
Prepaid and Other Current Assets	31.8	33
Total Current Assets	491.3	481
Property, Plant and Equipment	437.7	412.5
Accumulated Depreciation	(259.4)	(239.2)
Property, Plant and Equipment, Net	178.3	173.3
Operating lease assets	43.7	46.6
Goodwill	201.4	195.1
Intangible Assets, Net	126.6	137.7
Other Assets	22.2	29.2
Total Assets	1,063.5	1,062.9
Current Liabilities:
Current Portion of Long-Term Debt	16	31.3
Accounts Payable	86	94.1
Employee Compensation and Benefits	50.5	63.5
Other Current Liabilities	91.8	86
Total Current Liabilities	244.3	274.9
Long-Term Liabilities:
Long-Term Debt	307.6	307.5
Long-Term Operating Lease Liabilities	27.8	30.3
Employee-Related Benefits	18	19.4
Deferred Income Taxes	38.7	41.7
Other Liabilities	31.8	27.8
Total Long-Term Liabilities	423.9	426.7
Total Liabilities	668.2	701.6
Equity:
Common Stock, $0.375 par value; 60,000,000 shares authorized; 18,254,017 and 18,125,201 shares issued and outstanding, respectively	6.9	6.9
Additional Paid-In Capital	52.2	45.5
Retained Earnings	365	346
Accumulated Other Comprehensive Loss	(30.2)	(38.5)
Total Tennant Company Shareholders' Equity	393.9	359.9
Noncontrolling Interest	1.4	1.4
Total Equity	395.3	361.3
Total Liabilities and Total Equity	$ 1,063.5	$ 1,062.9

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current Assets:
Allowance For Doubtful Receivables And Sales Returns	$ 3.9	$ 3.6
Equity:
Common Stock, par value per share	$ 0.375	$ 0.375
Common Stock, shares authorized	60,000,000	60,000,000
Common Stock, shares issued	18,473,149	18,336,010
Common Stock, shares outstanding	18,473,149	18,336,010

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
OPERATING ACTIVITIES
Net Earnings Including Noncontrolling Interest	$ 31.2	$ 34.8
Adjustments to reconcile Net Earnings (Loss) to Net Cash Provided by Operating Activities:
Depreciation	24.1	24
Amortization of Intangible Assets	15.3	16.6
Amortization of Debt Issuance Costs	1.1	1
Fair Value Step-Up Adjustment to Acquired Inventory	0	0.9
Deferred Income Taxes	(1.7)	(2.7)
Share-Based Compensation Expense	4.7	8.7
Allowance for Doubtful Accounts and Returns	0.9	1.6
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	(0.3)	(1.8)
Note Receivable Writedown	0	2.7
Other, Net	1.8	(0.7)
Changes in Operating Assets and Liabilities, Net of Assets Acquired:
Receivables, Net	23.4	(0.8)
Inventories	13.1	(31.4)
Accounts Payable	(7.8)	(2.3)
Employee Compensation and Benefits	11.9	0.8
Other Current Liabilities	(6.8)	0.8
Other Assets and Liabilities	(3.2)	(2.8)
Net Cash Provided by Operating Activities	97.5	46.2
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment	(25.5)	(28.3)
Proceeds from Sale of Property, Plant, and Equipment	0.1	0.1
Proceeds from Principal Payments Received on Long-Term Note Receivable	0	0.1
Acquisition of Businesses, Net of Cash, Cash Equivalents and Restricted Cash Acquired	0	(8.9)
Purchase of Intangible Assets	(0.1)	(0.5)
Net Cash Used in Investing Activities	(25.5)	(37.5)
FINANCING ACTIVITIES
Proceeds from Credit Facility Borrowings	126.4	25
Repayments of Debt	(142.3)	(37.9)
Change in Finance Lease Obligations	0.1	(0.2)
Proceeds from Issuance of Common Stock	3.6	2.8
Payments to Noncontrolling Interests	0	(0.5)
Dividends Paid	(12.1)	(12)
Net Cash (Used in) Provided by Financing Activities	(24.5)	(22.8)
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	2.6	(0.3)
Net Decrease in Cash, Cash Equivalents and Restricted Cash	50.1	(14.4)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	74.6	86.1
Cash, Cash Equivalents and Restricted Cash at End of Period	124.7
Supplemental Disclosure of Cash Flow Information:
Cash Paid for Income Taxes	7.7	12.6
Cash Paid for Interest	9.6	10.6
Operating cash flows from operating leases	14.8
Financing cash flows from finance leases	0.1
Direct Financing Lease, Assets Acquired	0	0.1
Lease Asset Obtained in Exchange for New Operating Lease Liabilities	10.2
Supplemental Non-cash Investing and Financing Activities:
Capital Expenditures in Accounts Payable	$ 2.3	$ 1.1

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Tennant Company Shareholders' Equity	Noncontrolling Interest
Beginning balance at Dec. 31, 2018	$ 316.3	$ 6.8	$ 28.5	$ 316.3	$ (37.2)	$ 314.4	$ 1.9
Balance (in shares) at Dec. 31, 2018		18,125,201
Increase (Decrease) in Stockholders' Equity
Net Earnings (Loss)	5.4	$ 0	0	5.4	0	5.4	0
Other Comprehensive (Loss) Income	(1.3)	$ 0	0	0	(1.3)	(1.3)	0
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) (in shares)		35,338
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares)	0.2	$ 0	0.2	0	0	0.2	0
Share-Based Compensation	3.3	0	3.3	0	0	3.3	0
Dividends paid ($0.22, $0.22, $0.22, $0.21,$0.21, and $0.21) per Common Share	(4)	0	0	(4)	0	(4)	0
Recognition of Noncontrolling Interests	0.3	$ 0	0	0	0	0	0.3
Balance (in shares) at Mar. 31, 2019		18,160,539
Ending balance at Mar. 31, 2019	320.2	$ 6.8	32	317.7	(38.5)	318	2.2
Beginning balance at Dec. 31, 2018	316.3	$ 6.8	28.5	316.3	(37.2)	314.4	1.9
Balance (in shares) at Dec. 31, 2018		18,125,201
Increase (Decrease) in Stockholders' Equity
Net Earnings (Loss)	34.8
Balance (in shares) at Sep. 30, 2019		18,254,017
Ending balance at Sep. 30, 2019	339.8	$ 6.8	39.7	339.1	(47.3)	338.3	1.5
Beginning balance at Mar. 31, 2019	320.2	$ 6.8	32	317.7	(38.5)	318	2.2
Balance (in shares) at Mar. 31, 2019		18,160,539
Increase (Decrease) in Stockholders' Equity
Net Earnings (Loss)	14.8	$ 0	0	14.8	0	14.8	0
Other Comprehensive (Loss) Income	2.4	$ 0	0	0	2.4	2.4	0
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) (in shares)		31,947
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares)	0.3	$ 0	0.3	0	0	0.3	0
Share-Based Compensation	1.7	0	1.7	0	0	1.7	0
Dividends paid ($0.22, $0.22, $0.22, $0.21,$0.21, and $0.21) per Common Share	(4)	0	0	(4)	0	(4)	0
Recognition of Noncontrolling Interests	(0.3)	0	0	0	0	0	(0.3)
Other	0.1	$ 0	0	0	0	0	0.1
Balance (in shares) at Jun. 30, 2019		18,192,486
Ending balance at Jun. 30, 2019	335.2	$ 6.8	34.5	328.5	(36.1)	333.7	1.5
Increase (Decrease) in Stockholders' Equity
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	0	0	0.5	0	0	0.5	(0.5)
Net Earnings (Loss)	14.6	0	0	14.6	0	14.6	0
Other Comprehensive (Loss) Income	(11.2)	$ 0	0	0	(11.2)	(11.2)	0
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) (in shares)		61,531
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares)	1.5	$ 0	1.5	0	0	1.5	0
Share-Based Compensation	3.7	0	3.7	0	0	3.7	0
Dividends paid ($0.22, $0.22, $0.22, $0.21,$0.21, and $0.21) per Common Share	(4)	0	0	(4)	0	(4)	0
Recognition of Noncontrolling Interests	0	0	0	0	0	0	0
Other	0	$ 0	0	0	0	0	0
Balance (in shares) at Sep. 30, 2019		18,254,017
Ending balance at Sep. 30, 2019	339.8	$ 6.8	39.7	339.1	(47.3)	338.3	1.5
Increase (Decrease) in Stockholders' Equity
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	0	0	0	0	0	0	0
Beginning balance at Dec. 31, 2019	$ 361.3	$ 6.9	45.5	346	(38.5)	359.9	1.4
Balance (in shares) at Dec. 31, 2019	18,336,010	18,336,010
Increase (Decrease) in Stockholders' Equity
Net Earnings (Loss)	$ 5.2	$ 0	0	5.2	0	5.2	0
Other Comprehensive (Loss) Income	(7.6)	$ 0	0	0	(7.6)	(7.6)	0
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) (in shares)		98,805
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares)	1.1	$ 0	1.1	0	0	1.1	0
Share-Based Compensation	2.8	0	2.8	0	0	2.8	0
Dividends paid ($0.22, $0.22, $0.22, $0.21,$0.21, and $0.21) per Common Share	(4)	0	0	(4)	0	(4)	0
Other	(0.1)	$ 0	0	(0.1)	0	(0.1)	0
Balance (in shares) at Mar. 31, 2020		18,434,815
Ending balance at Mar. 31, 2020	358.7	$ 6.9	49.4	347.1	(46.1)	357.3	1.4
Beginning balance at Dec. 31, 2019	$ 361.3	$ 6.9	45.5	346	(38.5)	359.9	1.4
Balance (in shares) at Dec. 31, 2019	18,336,010	18,336,010
Increase (Decrease) in Stockholders' Equity
Net Earnings (Loss)	$ 31.2
Balance (in shares) at Sep. 30, 2020	18,473,149	18,473,149
Ending balance at Sep. 30, 2020	$ 395.3	$ 6.9	52.2	365	(30.2)	393.9	1.4
Beginning balance at Mar. 31, 2020	358.7	$ 6.9	49.4	347.1	(46.1)	357.3	1.4
Balance (in shares) at Mar. 31, 2020		18,434,815
Increase (Decrease) in Stockholders' Equity
Net Earnings (Loss)	14.3	$ 0	0	14.3	0	14.3	0
Other Comprehensive (Loss) Income	4.1	$ 0	0	0	4.1	4.1	0
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) (in shares)		20,647
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares)	0	$ 0		0	0	0	0
Dividends paid ($0.22, $0.22, $0.22, $0.21,$0.21, and $0.21) per Common Share	(4)	$ 0	0	(4)	0	(4)	0
Balance (in shares) at Jun. 30, 2020		18,455,462
Ending balance at Jun. 30, 2020	373.1	$ 6.9	49.4	357.4	(42)	371.7	1.4
Increase (Decrease) in Stockholders' Equity
Net Earnings (Loss)	11.7	0	0	11.7	0	11.7	0
Other Comprehensive (Loss) Income	11.8	$ 0	0	0	11.8	11.8	0
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) (in shares)		17,687
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares)	0.9	$ 0	0.9	0	0	0.9	0
Share-Based Compensation	1.9	0	1.9	0	0	1.9	0
Dividends paid ($0.22, $0.22, $0.22, $0.21,$0.21, and $0.21) per Common Share	$ (4.1)	$ 0	0	(4.1)	0	(4.1)	0
Balance (in shares) at Sep. 30, 2020	18,473,149	18,473,149
Ending balance at Sep. 30, 2020	$ 395.3	$ 6.9	$ 52.2	$ 365	$ (30.2)	$ 393.9	$ 1.4

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Parentheticals) - $ / shares	3 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Tax withholdings for Directors, Employee Benefit and Stock Plans (in shares)	1,321	15,756	1,560	6,952
Dividends paid per Common Share (in dollars per share)	$ 0.22	$ 0.22	$ 0.22	$ 0.22

Summary of Significant Accounti

Summary of Significant Accounting Policies (Notes)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	1. Summary of Significant Accounting Policies Basis of Presentation – The accompanying unaudited Consolidated Financial Statements have been prepared in accordance with the Securities and Exchange Commission (“SEC”) requirements for interim reporting. In our opinion, the Consolidated Financial Statements contain all adjustments (consisting of only normal recurring adjustments) necessary for the fair presentation of our financial position and results of operations. These statements should be read in conjunction with the Consolidated Financial Statements and Notes included in our annual report on Form 10-K for the year ended December 31, 2019 . The results of operations for interim periods are not necessarily indicative of the results to be expected for the full year. New Accounting Pronouncements – In March 2020, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update (“ASU”) No. 2020-04, Reference Rate Reform (Topic 848). This ASU provides optional expedients to applying generally accepted accounting principles to certain contract modifications, hedging relationships, and other transactions affected by the reference rate reform, which affects the London Inter-bank Offered Rate, if certain criteria are met. The amendments are effective March 12, 2020 through December 31, 2022. We are evaluating whether to apply any of the expedients and/or exceptions. Further details regarding the adoption of new accounting standards are discussed in Note 2. We documented the summary of significant accounting policies in the Notes to the Consolidated Financial Statements of our annual report on Form 10-K for the fiscal year ended December 31, 2019 . Other than the accounting policies noted above, there have been no material changes to our accounting policies since the filing of that report.

Newly Adopted Accounting Pronou

Newly Adopted Accounting Pronouncements (Notes)	9 Months Ended
	Sep. 30, 2020
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	2. Newly Adopted Accounting Pronouncements Financial Instruments On January 1, 2020, we adopted ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, and all related amendments . This ASU improves financial reporting by requiring more timely recording of credit losses on loans and other financial instruments held by financial institutions and other organizations. Under the new guidance, the ASU requires an organization to measure all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable supportable forecasts. We evaluated the impact of this amended guidance on our consolidated financial statements and related disclosures and concluded that it is immaterial. We estimate an allowance for doubtful accounts using a loss rate method. We considered the following in determining the expected loss rate: (1) historical loss rate, (2) macroeconomic factors, and (3) creditworthiness of customers. The historical loss rate is calculated by taking the yearly write-off expense, net of collections, as a percentage of the annual average balance of trade receivables for each of the past three years. A reconciliation of the beginning and ending allowance for doubtful accounts is as follows: Allowance for Doubtful Accounts: December 31, 2019 balance $ 3.6 Charged to costs and expenses 1.5 Deductions (a) (1.2 ) September 30, 2020 balance $ 3.9 (a) Includes accounts determined to be uncollectible and charged against reserves.

Revenue from Contracts with Cus

Revenue from Contracts with Customers (Notes)	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customer [Text Block]	3. Revenue Disaggregation of Revenue The following tables illustrate the disaggregation of revenue by geographic area, groups of similar products and services and sales channels for the three and nine months ended September 30, 2020 and 2019 : Net Sales by geographic area Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Americas $ 167.7 $ 186.1 $ 466.6 $ 536.4 Europe, Middle East and Africa 69.5 69.7 196.3 228.6 Asia Pacific 24.7 24.9 65.1 77.8 Total $ 261.9 $ 280.7 $ 728.0 $ 842.8 Net Sales are attributed to each geographic area based on the end user country and are net of intercompany sales. Net Sales by groups of similar products and services Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Equipment $ 167.6 $ 190.0 $ 456.3 $ 552.9 Parts and Consumables 52.7 46.9 150.2 158.2 Specialty Surface Coatings 5.3 6.9 16.6 20.2 Service and Other 36.3 36.9 104.9 111.5 Total $ 261.9 $ 280.7 $ 728.0 $ 842.8 For the three months ended September 30, 2019 , we reclassified $20.7 million from Service and Other to Equipment and $2.8 million from Service and Other to Parts and Consumables. For the nine months ended September 30, 2019 , we reclassified $4.9 million from Parts and Consumables to Equipment and $28.8 million from Service and Other to Equipment. Net Sales by sales channel Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Sales Direct to Consumer $ 177.3 $ 189.7 $ 488.2 $ 563.5 Sales to Distributors 84.6 91.0 239.8 279.3 Total $ 261.9 $ 280.7 $ 728.0 $ 842.8 Contract Liabilities Sales Returns The right of return may exist explicitly or implicitly with our customers. When the right of return exists, we adjust the transaction price for the estimated effect of returns. We estimate the expected returns using the expected value method by assessing historical sales levels and the timing and magnitude of historical sales return levels as a percent of sales and projecting this experience into the future. Sales Incentives Our sales contracts may contain various customer incentives, such as volume-based rebates or other promotions. We reduce the transaction price for certain customer programs and incentive offerings that represent variable consideration. Sales incentives given to our customers are recorded using the most likely amount approach for estimating the amount of consideration to which the Company will be entitled. We forecast the most likely amount of the incentive to be paid at the time of sale, update this forecast quarterly, and adjust the transaction price accordingly to reflect the new amount of incentives expected to be earned by the customer. A majority of our customer incentives are settled within one year. We record our accruals for volume-based rebates and other promotions in Other Current Liabilities on our Consolidated Balance Sheets. The change in our sales incentive accrual balance for the nine months ended September 30, 2020 and 2019 was as follows: Nine Months Ended September 30 2020 2019 Beginning balance $ 13.7 $ 16.7 Additions to sales incentive accrual 15.0 21.0 Contract payments (15.6 ) (24.4 ) Foreign currency fluctuations (0.1 ) (0.1 ) Ending balance $ 13.0 $ 13.2 Deferred Revenue We sell separately priced prepaid contracts to our customers where we receive payment at the inception of the contract and defer recognition of the consideration received because we have to satisfy future performance obligations. Our deferred revenue balance is primarily attributed to prepaid maintenance contracts on our machines ranging from 12 months to 60 months . In circumstances where prepaid contracts are bundled with machines, we use an observable price to determine stand-alone selling price for separate performance obligations. The change in the deferred revenue balance for the nine months ended September 30, 2020 and 2019 was as follows: Nine Months Ended September 30 2020 2019 Beginning balance $ 10.7 $ 8.5 Increase in deferred revenue representing our obligation to satisfy future performance obligations 15.3 16.9 Deferred revenue addition from the acquisition of Gaomei — 1.4 Decrease in deferred revenue for amounts recognized in Net Sales for satisfied performance obligations (15.0 ) (16.8 ) Foreign currency fluctuations (0.8 ) (0.1 ) Ending balance $ 10.2 $ 9.9 Certain 2019 numbers in the table above have been adjusted to conform with current year presentation. At September 30, 2020 , $6.7 million and $3.5 million of deferred revenue was reported in Other Current Liabilities and Other Liabilities, respectively, on our Consolidated Balance Sheets. Of this, we expect to recognize the following approximate amounts in Net Sales in the following periods: Remaining 2020 $ 4.6 2021 2.7 2022 1.6 2023 0.8 2024 0.4 Thereafter 0.1 Total $ 10.2 At December 31, 2019 , $6.8 million and $3.9 million

Management Actions

Management Actions	9 Months Ended
	Sep. 30, 2020
Restructuring and Related Activities [Abstract]
Management Actions	4. Management Actions Restructuring Actions In the third quarter of 2020, we implemented a restructuring action to consolidate our Gaomei business and our existing China business in order to deliver cost synergies and improve our profitability. The pre-tax charge of $1.6 million in the first nine months of 2020 consisted of $1.3 million of severance-related costs and $0.3 million of other costs, all of which were recorded in the third quarter of 2020. Of the restructuring costs, $0.5 million were included in Cost of Sales and $1.1 million in Selling and Administrative Expense in the Consolidated Statements of Earnings. We expect to incur up to $2.9 million of costs related to this restructuring. The charge impacted our Asia Pacific (APAC) operating segment. We estimate the savings will offset the pre-tax charge approximately one year from the date of the action. In the first quarter of 2020, we implemented a restructuring action in an effort to streamline our operating model in Japan. The pre-tax charge of $1.6 million in the first nine months of 2020 consisted of $1.1 million of severance-related costs and $0.5 million of other costs, of which $0.1 million was recorded in the third quarter of 2020. Of the restructuring costs, $0.1 million were included in Cost of Sales and $1.5 million in Selling and Administrative Expense in the Consolidated Statements of Earnings. We expect to incur up to $2 million of costs related to this restructuring. The charge impacted our Asia Pacific (APAC) operating segment. We estimate the savings will offset the pre-tax charge approximately one year from the date of the action. During 2019, we implemented a restructuring action to further our integration efforts related to the IPC Group. The pre-tax charge of $4.8 million consisted of severance, with $0.3 million in Cost of Sales and $4.5 million in Selling and Administrative Expense in the Consolidated Statements of Earnings. The charge impacted our Europe, Middle East and Africa (EMEA) as well as our Americas operating segments. We expect no further charges related to this restructuring action. We estimate the savings have offset the pre-tax charges incurred to date. A reconciliation of the beginning and ending liability balances is as follows: Severance and Related Costs December 31, 2018 balance $ 2.2 2019 charges and utilization: New charges 6.1 Cash payments (2.5 ) Adjustments to accrual (1.3 ) December 31, 2019 balance $ 4.5 2020 charges and utilization: New charges 2.4 Cash payments (4.2 ) Foreign currency fluctuations 0.1 Adjustment to accrual (0.5 ) September 30, 2020 balance $ 2.3 Other Actions In 2019, we made the decision to discontinue certain product lines. During the nine months ended September 30, 2020 , we recorded an additional $1.7 million in Cost of Sales in the Consolidated Statements of Earnings to reflect our estimate of inventory that will not be sold, all of which was recorded in the first quarter of 2020.

Acquisition (Notes)

Acquisition (Notes)	9 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
Acquisitions	5. Acquisition On January 4, 2019, we completed the acquisition of Hefei Gaomei Cleaning Machines Co., Ltd. and Anhui Rongen Environmental Protection Technology Co., Ltd. (collectively "Gaomei") , privately held designers and manufacturers of commercial cleaning solutions based in China. The financial results for Gaomei have been included in the consolidated financial results since the date of closing. The fair value measurements were final as of December 31, 2019. The total purchase price includes the following: • $11.3 million was paid during the first quarter of 2019 upon close of the transaction; • $11.3 million which was paid in the fourth quarter of 2019; • $4.7 million which represents the estimated fair value of contingent consideration at the acquisition date. In April 2020, the earnout agreement was modified. The final payment is based on a fixed payment plus variable payments contingent on achieving certain levels of gross profit and achieving integration milestones. Consideration of $1.4 million to $3.1 million will be paid in March 2021 if the targets are met. As of September 30, 2020 , the contingent consideration had a fair value of $1.9 million based on a probability-weighted analysis of achieving targets; and • $(0.2) million which represents a working capital purchase price adjustment. None of the goodwill is expected to be deductible for income tax purposes. The expected lives of the acquired amortizable intangible assets range from 10 years to 15 years

Inventories

Inventories	9 Months Ended
	Sep. 30, 2020
Inventory Disclosure [Abstract]
Inventories	6. Inventories Inventories are valued at the lower of cost or net realizable value. Inventories at September 30, 2020 and December 31, 2019 consisted of the following: September 30, December 31, Inventories carried at LIFO: Finished goods $ 44.1 $ 50.9 Raw materials, production parts and work-in-process 25.1 32.5 Excess of FIFO over LIFO cost (a) (31.8 ) (33.4 ) Total LIFO inventories 37.4 50.0 Inventories carried at FIFO: Finished goods 56.4 60.1 Raw materials, production parts and work-in-process 39.7 40.0 Total FIFO inventories 96.1 100.1 Total inventories $ 133.5 $ 150.1 (a) The difference between replacement cost and the stated LIFO inventory value is not materially different from the reserve for the LIFO valuation method.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	7. Goodwill and Intangible Assets The changes in the carrying value of Goodwill for the nine months ended September 30, 2020 were as follows: Goodwill Accumulated Impairment Losses Total Balance as of December 31, 2019 $ 235.1 $ (40.0 ) $ 195.1 Additions — — — Foreign currency fluctuations 5.8 0.5 6.3 Balance as of September 30, 2020 $ 240.9 $ (39.5 ) $ 201.4 The balances of acquired Intangible Assets, excluding Goodwill, as of September 30, 2020 and December 31, 2019 , were as follows: Customer Lists Trade Names Technology Total Balance as of September 30, 2020 Original cost $ 159.4 $ 33.1 $ 17.4 $ 209.9 Accumulated amortization (63.3 ) (11.0 ) (9.0 ) (83.3 ) Carrying value $ 96.1 $ 22.1 $ 8.4 $ 126.6 Weighted average original life (in years) 15 11 11 Balance as of December 31, 2019 Original cost $ 154.1 $ 31.8 $ 17.1 $ 203.0 Accumulated amortization (49.8 ) (8.2 ) (7.3 ) (65.3 ) Carrying value $ 104.3 $ 23.6 $ 9.8 $ 137.7 Weighted average original life (in years) 15 11 11 Amortization expense on Intangible Assets for the three and nine months ended September 30, 2020 was $5.3 million and $15.3 million , respectively. Amortization expense on Intangible Assets for the three and nine months ended September 30, 2019 was $5.1 million and $16.6 million , respectively. Estimated aggregate amortization expense based on the current carrying value of amortizable Intangible Assets for each of the five succeeding years and thereafter is as follows: Remaining 2020 $ 5.3 2021 19.7 2022 17.5 2023 16.0 2024 14.4 Thereafter 53.7 Total $ 126.6

Debt

Debt	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Debt	8. Debt Financial Covenants In 2017, the Company and certain of our foreign subsidiaries entered into a secured Credit Agreement (the "2017 Credit Agreement") with JPMorgan, as administrative agent, Goldman Sachs Bank USA, as syndication agent, Wells Fargo National Association, U.S. Bank National Association, and HSBC Bank USA, National Association, as co-documentation agents, and the lenders (including JPMorgan) from time to time party thereto. The 2017 Credit Agreement contains customary representations, warranties and covenants, including, but not limited to, covenants restricting the Company’s ability to incur indebtedness and liens and merge or consolidate with another entity, and expires in April 2022. The 2017 Credit Agreement also contains financial covenants requiring us to maintain a net leverage ratio of consolidated net indebtedness to consolidated earnings before income, taxes, depreciation and amortization, subject to certain adjustments ("Adjusted EBITDA") of not greater than 4.00 to 1, as well as requiring us to maintain an interest coverage ratio of consolidated Adjusted EBITDA to consolidated interest expense of no less than 3.50 to 1 for the quarter ended September 30, 2020 . The 2017 Credit Agreement also contains a financial covenant requiring us to maintain a senior secured net leverage ratio of consolidated senior secured net indebtedness to consolidated Adjusted EBITDA ratio of not greater than 3.50 to 1. These financial covenants may restrict our ability to pay dividends and purchase outstanding shares of our common stock. We were in compliance with our financial covenants at September 30, 2020 . Senior Notes Guarantees Our Senior Notes (the "Notes") are unconditionally and jointly and severally guaranteed by Tennant Coatings, Inc. and Tennant Sales and Service Company (collectively, the "Guarantors" or "Guarantor Subsidiaries"), which are 100% owned subsidiaries of the Company. The Notes and the guarantees constitute senior unsecured obligations of the Company and the Guarantors, respectively. The Notes and the guarantees, respectively, are: (a) equal in right of payment with all of the Company's and the Guarantors' senior debt, without giving effect to collateral arrangements; (b) senior in right of payment to all of the Company's and the Guarantors' future subordinated debt, if any; (c) effectively subordinated in right of payment to all of the Company's and the Guarantors' debt and obligations that are secured, including borrowings under the Company's senior secured credit facilities for so long as the senior secured credit facilities are secured, to the extent of the value of the assets securing such liens, and (d) structurally subordinated in right of payment to all liabilities (including trade payables) of the Company's and the Guarantors' subsidiaries that do not guarantee the Notes. In the second quarter of 2020, the Company early adopted the SEC's rule titled "Financial Disclosures about Guarantors and Issuers of Guaranteed Securities and Affiliates Whose Securities Collateralize a Registrant's Securities," which simplifies the disclosure requirements related to the Notes under Rule 3-10 of Regulation S-X. Under this amended rule, the Company is not required to disclose separate financial statements for the guarantees as it no longer has a reporting requirement. The Company has filed a Form 15 for the Guarantors to suspend the Company's duty to file reports on the guarantor financial statements. Debt Outstanding Debt outstanding at September 30, 2020 and December 31, 2019 consisted of the following: September 30, December 31, Senior Unsecured Notes $ 300.0 $ 300.0 Credit Facility Borrowings 25.0 40.0 Secured Borrowings 1.7 2.4 Finance Lease Liabilities 0.1 0.2 Unamortized Debt Issuance Costs (3.2 ) (3.8 ) Total Debt 323.6 338.8 Less: Current Portion of Long-Term Debt (a) (16.0 ) (31.3 ) Long-Term Debt $ 307.6 $ 307.5 (a) Current portion of long-term debt as of September 30, 2020 includes a $15.0 million anticipated repayment on credit facility borrowings under our 2017 Credit Agreement, $0.9 million of current maturities of secured borrowings and $0.1 million of current maturities of finance lease liabilities. As of September 30, 2020 , we had outstanding borrowings under our Senior Unsecured Notes of $300.0 million . In addition, we had outstanding borrowings of $25.0 million under our revolving facility and had letters of credit and bank guarantees outstanding in the amount of $3.3 million , leaving approximately $171.7 million of unused borrowing capacity on our revolving facility. Commitment fees on unused lines of credit for the nine months ended September 30, 2020 were $0.4 million . The overall weighted average cost of debt is approximately 5.3% and net of a related cross-currency swap instrument is approximately 4.3% . Further details regarding the cross-currency swap instrument are discussed in Note 10.

Warranty

Warranty	9 Months Ended
	Sep. 30, 2020
Product Warranties Disclosures [Abstract]
Warranty	9. Warranty We record a liability for warranty claims at the time of sale. The amount of the liability is based on the trend in the historical ratio of claims to sales, the historical length of time between the sale and resulting warranty claim, new product introductions and other factors. Warranty terms on machines generally range from one to four years . However, the majority of our claims are paid out within the first six to nine months following a sale. The majority of the liability for estimated warranty claims represents amounts to be paid out in the near term for qualified warranty issues, with immaterial amounts reserved to be paid for older equipment warranty issues. The changes in warranty reserves for the nine months ended September 30, 2020 and 2019 were as follows: Nine Months Ended September 30 2020 2019 Beginning balance $ 12.7 $ 13.1 Additions charged to expense 6.9 9.7 Foreign currency fluctuations — (0.1 ) Claims paid (8.6 ) (8.8 ) Ending balance $ 11.0 $ 13.9

Derivatives (Notes)

Derivatives (Notes)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	10. Derivatives Hedge Accounting and Hedging Programs We recognize all derivative instruments as either assets or liabilities in our Consolidated Balance Sheets and measure them at fair value. Gains and losses resulting from changes in fair value are accounted for depending on the use of the derivative and whether it is designated and qualifies for hedge accounting. We evaluate hedge effectiveness on our hedges that are designated and qualify for hedge accounting at the inception of the hedge prospectively, as well as retrospectively, and record any ineffective portion of the hedging instruments along with the time value of purchased contracts in the same line item of the income statement as the item being hedged on our Consolidated Statements of Earnings. In prior years, ineffective portions of hedging instruments and time value of purchased contracts were recorded in Net Foreign Currency Transaction Loss on our Consolidated Statements of Earnings. Our hedging policy establishes maximum limits for each counterparty to mitigate any concentration of risk. Balance Sheet Hedging Hedges of Foreign Currency Assets and Liabilities We hedge our net recognized foreign currency denominated assets and liabilities with foreign exchange forward contracts to reduce the risk that the value of these assets and liabilities will be adversely affected by changes in exchange rates. These contracts hedge assets and liabilities that are denominated in foreign currencies and are carried at fair value as either assets or liabilities on the Consolidated Balance Sheets with changes in the fair value recorded to Net Foreign Currency Transaction Loss in our Consolidated Statements of Earnings. These contracts do not subject us to material balance sheet risk due to exchange rate movements because gains and losses on these derivatives are intended to offset gains and losses on the assets and liabilities being hedged. At September 30, 2020 and December 31, 2019 , the notional amounts of foreign currency forward exchange contracts outstanding not designated as hedging instruments were $55.4 million and $41.9 million , respectively. Cash Flow Hedging Hedges of Forecasted Foreign Currency Transactions In countries outside the U.S., we transact business in U.S. dollars and in various other currencies. We may use foreign exchange option contracts or forward contracts to hedge certain cash flow exposures resulting from changes in these foreign currency exchange rates. These foreign exchange contracts, carried at fair value, have maturities of up to one year . We enter into these foreign exchange contracts to hedge a portion of our forecasted foreign currency denominated revenue in the normal course of business, and accordingly, they are not speculative in nature. The notional amounts of outstanding foreign currency forward contracts designated as cash flow hedges were $2.8 million as of September 30, 2020 and $3.0 million as of December 31, 2019 . The notional amounts of outstanding foreign currency option contracts designated as cash flow hedges were $8.2 million and $9.8 million as of September 30, 2020 and December 31, 2019 , respectively. Foreign Currency Derivatives We use foreign currency exchange rate derivatives to hedge our exposure to fluctuations in exchange rates for anticipated intercompany cash transactions between Tennant Company and its subsidiaries. We entered into Euro to U.S. dollar foreign exchange cross-currency swaps for all of the anticipated cash flows associated with an intercompany loan from a wholly-owned European subsidiary. We enter into these foreign exchange cross-currency swaps to hedge the foreign currency denominated cash flows associated with this intercompany loan, and accordingly, they are not speculative in nature. These cross-currency swaps are designated as cash flow hedges. The hedged cash flows as of September 30, 2020 and December 31, 2019 included €161.4 million and €166.8 million of total notional values, respectively. As of September 30, 2020 , the aggregate scheduled interest payments over the course of the loan and related swaps amounted to €11.4 million . The scheduled maturity and principal payment of the loan and related swaps of €150.0 million are due in April 2022. There were no new cross-currency swaps designated as cash flow hedges as of September 30, 2020 . The fair value of derivative instruments on our Consolidated Balance Sheets as of September 30, 2020 and December 31, 2019 was as follows: Derivative Assets Derivative Liabilities Balance Sheet Location September 30, 2020 December 31, 2019 Balance Sheet Location September 30, 2020 December 31, 2019 Derivatives designated as hedging instruments: Foreign currency option contracts Other Current Assets $ 0.1 $ — Other Current Liabilities $ — $ — Foreign currency forward contracts Other Current Assets 2.2 2.5 Other Current Liabilities — — Foreign currency forward contracts Other Assets — — Other Liabilities 16.4 12.6 Derivatives not designated as hedging instruments: Foreign currency forward contracts Other Current Assets $ 1.4 $ 0.6 Other Current Liabilities $ 0.2 $ 0.3 As of September 30, 2020 , we anticipate reclassifying approximately $2.1 million of gains from Accumulated Other Comprehensive Loss to net earnings during the next 12 months. The following tables include the amounts in the Consolidated Statements of Earnings in which the effects of cash flow hedges are recorded and the effects of cash flow hedge activity on these line items for the three and nine months ended September 30, 2020 and 2019: Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Total Amount of Gain (Loss) on Cash Flow Hedge Activity Total Amount of Gain (Loss) on Cash Flow Hedge Activity Total Amount of Gain (Loss) on Cash Flow Hedge Activity Total Amount of Gain (Loss) on Cash Flow Hedge Activity Net Sales $ 261.9 $ (0.1 ) $ 280.7 $ (0.1 ) $ 728.0 $ (0.1 ) $ 842.8 $ (0.1 ) Interest Income 0.8 0.6 0.8 0.7 2.5 2.1 2.5 2.1 Net Foreign Currency Transaction Loss (0.9 ) (7.3 ) (0.6 ) 7.1 (5.0 ) (7.6 ) (0.6 ) 8.1 The effect of foreign currency derivative instruments designated as hedges and of foreign currency derivative instruments not designated as hedges in our Consolidated Statements of Earnings for the three and nine months ended September 30, 2020 was as follows: Three Months Ended Nine Months Ended September 30, 2020 September 30, 2020 Foreign Currency Option Contracts Foreign Currency Forward Contracts Foreign Currency Option Contracts Foreign Currency Forward Contracts Derivatives in cash flow hedging relationships: Net (loss) gain recognized in Other Comprehensive Income (Loss), net of tax (a) $ (0.1 ) $ (5.8 ) $ (0.1 ) $ (1.6 ) Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales — (0.1 ) — (0.1 ) Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income — 0.5 — 1.6 Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Loss — (5.7 ) — (5.9 ) Derivatives not designated as hedging instruments: Net (loss) gain recognized in earnings (b) $ — $ (1.7 ) $ — $ (1.1 ) The effect of foreign currency derivative instruments designated as hedges and of foreign currency derivative instruments not designated as hedges in our Consolidated Statements of Earnings for the three and nine months ended September 30, 2019 was as follows: Three Months Ended Nine Months Ended September 30, 2019 September 30, 2019 Foreign Currency Option Contracts Foreign Currency Forward Contracts Foreign Currency Option Contracts Foreign Currency Forward Contracts Derivatives in cash flow hedging relationships: Net gain (loss) recognized in Other Comprehensive (Loss) Income, net of tax (a) $ — $ 7.2 $ (0.2 ) $ 11.3 Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income — 0.5 — 1.6 Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction (Gain) Loss — 5.4 — 6.2 Derivatives not designated as hedging instruments: Net gain (loss) recognized in earnings (b) $ — $ 0.6 $ — $ (0.2 ) (a) Net change in the fair value of the effective portion classified in Other Comprehensive (Loss) Income. (b) Classified in Net Foreign Currency Transaction Loss.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	11. Fair Value Measurements Estimates of fair value for financial assets and financial liabilities are based on the framework established in the accounting guidance for fair value measurements. The framework defines fair value, provides guidance for measuring fair value and requires certain disclosures. The framework discusses valuation techniques, such as the market approach (comparable market prices), the income approach (present value of future income or cash flow) and the cost approach (cost to replace the service capacity of an asset or replacement cost). The framework utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels: • Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities. • Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. • Level 3: Unobservable inputs that reflect the reporting entity’s own assumptions. Our population of assets and liabilities subject to fair value measurements at September 30, 2020 is as follows: Fair Value Level 1 Level 2 Level 3 Assets: Foreign currency forward exchange contracts $ 4.9 $ — $ 4.9 $ — Foreign currency options contracts 0.1 — 0.1 — Total Assets $ 5.0 $ — $ 5.0 $ — Liabilities: Foreign currency forward exchange contracts $ 17.9 $ — $ 17.9 $ — Contingent consideration 1.9 — — 1.9 Total Liabilities $ 19.8 $ — $ 17.9 $ 1.9 Our population of assets and liabilities subject to fair value measurements at December 31, 2019 is as follows: Fair Value Level 1 Level 2 Level 3 Assets: Foreign currency forward exchange contracts $ 6.4 $ — $ 6.4 $ — Total Assets $ 6.4 $ — $ 6.4 $ — Liabilities: Foreign currency forward exchange contracts $ 16.2 $ — $ 16.2 $ — Contingent consideration $ 2.1 — — 2.1 Total Liabilities $ 18.3 $ — $ 16.2 $ 2.1 Our foreign currency forward exchange and option contracts are valued using observable Level 2 market expectations at the measurement date and standard valuation techniques to convert future amounts to a single present value amount. Further details regarding our foreign currency forward exchange and option contracts are discussed in Note 10. Contingent consideration is valued using a probability-weighted analysis of projected gross profit and integration milestones. Actual results may differ significantly from those used in the estimate above, which may affect future payments. Changes in future payments will be reflected in future operating results as they occur. The carrying amounts reported in the Consolidated Balance Sheets for Cash and Cash Equivalents, Restricted Cash, Accounts Receivable, Other Current Assets, Accounts Payable and Other Current Liabilities approximate fair value due to their short-term nature. The fair value and carrying value of total debt, including current portion, were $337.5 million and $ 323.6 million , respectively, as of September 30, 2020 . The fair value and carrying value of total debt, including current portion, were $357.2 million and $338.8 million , respectively, as of December 31, 2019. The fair value was calculated based on the borrowing rates currently available to us for bank loans with similar terms and remaining maturities, which is a Level 2 in the fair value hierarchy. From time to time, we measure certain assets at fair value on a non-recurring basis, including evaluation of long-lived assets, goodwill and other intangible assets, as part of a business acquisition. These assets are measured and recognized at amounts equal to the fair value determined as of the date of acquisition. Fair value valuations are based on the information available as of the acquisition date and the expectations and assumptions that have been deemed reasonable by us. There are inherent uncertainties and management judgment required in these determinations. The fair value measurements of assets and liabilities assumed as part of a business acquisition are based on valuations involving significant unobservable inputs, or Level 3, in the fair value hierarchy. These assets are also subject to periodic impairment testing by comparing the respective carrying value of each asset to the estimated fair value of the reporting unit or asset group in which they reside. In the event we determine these assets to be impaired, we would recognize an impairment loss equal to the amount by which the carrying value of the reporting unit, impairment asset or asset group exceeds its estimated fair value. These periodic impairment tests utilize company-specific assumptions involving unobservable inputs, or Level 3, in the fair value hierarchy.

Retirement Benefit Plans

Retirement Benefit Plans	9 Months Ended
	Sep. 30, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Retirement Benefit Plans	12. Retirement Benefit Plans Our defined benefit pension plans and postretirement medical plan are described in Note 13 of our annual report on Form 10-K for the year ended December 31, 2019 . We have contributed less than $0.1 million and $0.1 million during the third quarter of 2020 and $0.2 million and $0.4 million during the first nine months of 2020 to our pension plans and postretirement medical plan, respectively. We contributed $0.1 million and $0.3 million during the third quarter of 2019 and $0.3 million and $0.7 million during the first nine months of 2019 to our pension plans and postretirement medical plan, respectively. Net benefit costs for the three and nine months ended September 30, 2020 and 2019 were not material.

Commitments and Contingencies (

Commitments and Contingencies (Notes)	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	13. Commitments and Contingencies In the ordinary course of business, we may become liable with respect to pending and threatened litigation, tax, environmental and other matters. While the ultimate results of current claims, investigations and lawsuits involving us are unknown at this time, we do not expect that these matters will have a material adverse effect on our consolidated financial position or results of operations. Legal costs associated with such matters are expensed as incurred.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss (Notes)	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Accumulated Other Comprehensive Loss	14. Accumulated Other Comprehensive Loss Components of Accumulated Other Comprehensive Loss, net of tax, within the Consolidated Balance Sheets, are as follows: September 30, 2020 December 31, 2019 Foreign currency translation adjustments $ (30.7 ) $ (36.3 ) Pension and retiree medical benefits (0.7 ) (0.7 ) Cash flow hedge 1.2 (1.5 ) Total Accumulated Other Comprehensive Loss $ (30.2 ) $ (38.5 ) The changes in components of Accumulated Other Comprehensive Loss, net of tax, are as follows: Foreign Currency Translation Adjustments Pension and Post-Retirement Benefits Cash Flow Hedge Total December 31, 2019 $ (36.3 ) $ (0.7 ) $ (1.5 ) $ (38.5 ) Other comprehensive (loss) income before reclassifications 5.6 — (1.6 ) 4.0 Amounts reclassified from Accumulated Other Comprehensive Loss — — 4.3 4.3 Net current period other comprehensive (loss) income 5.6 — 2.7 8.3 September 30, 2020 $ (30.7 ) $ (0.7 ) $ 1.2 $ (30.2 )

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	15. Income Taxes We and our subsidiaries are subject to U.S. federal income tax as well as income tax of numerous state and foreign jurisdictions. We are generally no longer subject to U.S. federal tax examinations for taxable years before 2018 and, with limited exceptions, state and foreign income tax examinations for taxable years before 2015. We recognize potential accrued interest and penalties related to unrecognized tax benefits in Income Tax Expense. In addition to the liability of $7.1 million for unrecognized tax benefits as of September 30, 2020 , there was approximately $0.7 million for accrued interest and penalties. The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate as of September 30, 2020 was $6.9 million . To the extent interest and penalties are not assessed with respect to uncertain tax positions, amounts accrued will be revised and reflected as an adjustment of the Income Tax Expense. The Internal Revenue Service completed its examination of the U.S. income tax returns for tax years 2016 and 2017 during the third quarter. The IRS’s adjustments to certain tax positions were not material and were fully reserved. We are currently undergoing income tax examinations in various foreign jurisdictions covering 2017. Although the final outcome of these examinations cannot be currently determined, we believe that we have adequate reserves with respect to these examinations.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share-Based Compensation	16. Share-Based Compensation Our share-based compensation plans are described in Note 18 of our annual report on Form 10-K for the year ended December 31, 2019 . During the three months ended September 30, 2020 and 2019, we recognized total Share-Based Compensation Expense of $1.9 million and $3.7 million , respectively. During the nine months ended September 30, 2020 and 2019 , we recognized total Share-Based Compensation Expense of $4.7 million and $8.7 million , respectively. The total excess tax benefit recognized for share-based compensation arrangements during the nine months ended September 30, 2020 and 2019 was $0.3 million and $0.7 million , respectively. During the first nine months of 2020 , we issued 17,348 restricted shares. The weighted average grant date fair value of each share awarded was $81.07 . Restricted share awards generally have a three year vesting period from the effective date of the grant. The total fair value of shares vested during the nine months ended September 30, 2020 and 2019 was $0.7 million and $1.0 million , respectively.

Earnings Attributable to Tennan

Earnings Attributable to Tennant Company Per Share	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Earnings (Loss) Attributable to Tennant Company Per Share	17. Earnings Attributable to Tennant Company Per Share The computations of Basic and Diluted Earnings per Share were as follows: Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Numerator: Net Earnings Attributable to Tennant Company $ 11.7 $ 14.6 $ 31.2 $ 34.8 Denominator: Basic - Weighted Average Shares Outstanding 18,371,883 18,134,909 18,335,430 18,086,962 Effect of dilutive securities: Share-based compensation plans 276,445 353,039 288,537 315,967 Diluted - Weighted Average Shares Outstanding 18,648,328 18,487,948 18,623,967 18,402,929 Basic Earnings per Share $ 0.64 $ 0.81 $ 1.70 $ 1.93 Diluted Earnings per Share $ 0.63 $ 0.79 $ 1.68 $ 1.89 Excluded from the dilutive securities shown above were options to purchase and shares to be paid out under share-based compensation plans of 578,858 and 485,853 shares of common stock during the three months ended September 30, 2020 and 2019 , respectively. Excluded from the dilutive securities shown above were options to purchase and shares to be paid out under share-based compensation plans of 620,605 and 687,972 shares of common stock during the nine months ended September 30, 2020 and 2019 , respectively. These exclusions were made if the exercise prices of the options are greater than the average market price of our common stock for the period, if the number of shares we can repurchase under the treasury stock method exceeds the weighted average shares outstanding in the options or if we have a net loss, as these effects are anti-dilutive.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation – The accompanying unaudited Consolidated Financial Statements have been prepared in accordance with the Securities and Exchange Commission (“SEC”) requirements for interim reporting. In our opinion, the Consolidated Financial Statements contain all adjustments (consisting of only normal recurring adjustments) necessary for the fair presentation of our financial position and results of operations. These statements should be read in conjunction with the Consolidated Financial Statements and Notes included in our annual report on Form 10-K for the year ended December 31, 2019 . The results of operations for interim periods are not necessarily indicative of the results to be expected for the full year.
New Accounting Pronouncements	New Accounting Pronouncements – In March 2020, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update (“ASU”) No. 2020-04, Reference Rate Reform (Topic 848). This ASU provides optional expedients to applying generally accepted accounting principles to certain contract modifications, hedging relationships, and other transactions affected by the reference rate reform, which affects the London Inter-bank Offered Rate, if certain criteria are met. The amendments are effective March 12, 2020 through December 31, 2022. We are evaluating whether to apply any of the expedients and/or exceptions. Further details regarding the adoption of new accounting standards are discussed in Note 2.

Newly Adopted Accounting Pron_2

Newly Adopted Accounting Pronouncements (Tables)	9 Months Ended
	Sep. 30, 2020
Accounting Changes and Error Corrections [Abstract]
Accounts Receivable, Allowance for Credit Loss [Table Text Block]	A reconciliation of the beginning and ending allowance for doubtful accounts is as follows: Allowance for Doubtful Accounts: December 31, 2019 balance $ 3.6 Charged to costs and expenses 1.5 Deductions (a) (1.2 ) September 30, 2020 balance $ 3.9 (a) Includes accounts determined to be uncollectible and charged against reserves.

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	The following tables illustrate the disaggregation of revenue by geographic area, groups of similar products and services and sales channels for the three and nine months ended September 30, 2020 and 2019 : Net Sales by geographic area Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Americas $ 167.7 $ 186.1 $ 466.6 $ 536.4 Europe, Middle East and Africa 69.5 69.7 196.3 228.6 Asia Pacific 24.7 24.9 65.1 77.8 Total $ 261.9 $ 280.7 $ 728.0 $ 842.8 Net Sales are attributed to each geographic area based on the end user country and are net of intercompany sales. Net Sales by groups of similar products and services Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Equipment $ 167.6 $ 190.0 $ 456.3 $ 552.9 Parts and Consumables 52.7 46.9 150.2 158.2 Specialty Surface Coatings 5.3 6.9 16.6 20.2 Service and Other 36.3 36.9 104.9 111.5 Total $ 261.9 $ 280.7 $ 728.0 $ 842.8 For the three months ended September 30, 2019 , we reclassified $20.7 million from Service and Other to Equipment and $2.8 million from Service and Other to Parts and Consumables. For the nine months ended September 30, 2019 , we reclassified $4.9 million from Parts and Consumables to Equipment and $28.8 million from Service and Other to Equipment. Net Sales by sales channel Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Sales Direct to Consumer $ 177.3 $ 189.7 $ 488.2 $ 563.5 Sales to Distributors 84.6 91.0 239.8 279.3 Total $ 261.9 $ 280.7 $ 728.0 $ 842.8
Contract with Customer, Asset and Liability [Table Text Block]	The change in our sales incentive accrual balance for the nine months ended September 30, 2020 and 2019 was as follows: Nine Months Ended September 30 2020 2019 Beginning balance $ 13.7 $ 16.7 Additions to sales incentive accrual 15.0 21.0 Contract payments (15.6 ) (24.4 ) Foreign currency fluctuations (0.1 ) (0.1 ) Ending balance $ 13.0 $ 13.2
Deferred Revenue, by Arrangement, Disclosure [Table Text Block]	The change in the deferred revenue balance for the nine months ended September 30, 2020 and 2019 was as follows: Nine Months Ended September 30 2020 2019 Beginning balance $ 10.7 $ 8.5 Increase in deferred revenue representing our obligation to satisfy future performance obligations 15.3 16.9 Deferred revenue addition from the acquisition of Gaomei — 1.4 Decrease in deferred revenue for amounts recognized in Net Sales for satisfied performance obligations (15.0 ) (16.8 ) Foreign currency fluctuations (0.8 ) (0.1 ) Ending balance $ 10.2 $ 9.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]	At September 30, 2020 , $6.7 million and $3.5 million of deferred revenue was reported in Other Current Liabilities and Other Liabilities, respectively, on our Consolidated Balance Sheets. Of this, we expect to recognize the following approximate amounts in Net Sales in the following periods: Remaining 2020 $ 4.6 2021 2.7 2022 1.6 2023 0.8 2024 0.4 Thereafter 0.1 Total $ 10.2

Management Actions (Tables)

Management Actions (Tables)	9 Months Ended
	Sep. 30, 2020
Restructuring and Related Activities [Abstract]
Reconciliation of beginning and ending liability balances	A reconciliation of the beginning and ending liability balances is as follows: Severance and Related Costs December 31, 2018 balance $ 2.2 2019 charges and utilization: New charges 6.1 Cash payments (2.5 ) Adjustments to accrual (1.3 ) December 31, 2019 balance $ 4.5 2020 charges and utilization: New charges 2.4 Cash payments (4.2 ) Foreign currency fluctuations 0.1 Adjustment to accrual (0.5 ) September 30, 2020 balance $ 2.3

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2020
Inventory Disclosure [Abstract]
Inventories	Inventories are valued at the lower of cost or net realizable value. Inventories at September 30, 2020 and December 31, 2019 consisted of the following: September 30, December 31, Inventories carried at LIFO: Finished goods $ 44.1 $ 50.9 Raw materials, production parts and work-in-process 25.1 32.5 Excess of FIFO over LIFO cost (a) (31.8 ) (33.4 ) Total LIFO inventories 37.4 50.0 Inventories carried at FIFO: Finished goods 56.4 60.1 Raw materials, production parts and work-in-process 39.7 40.0 Total FIFO inventories 96.1 100.1 Total inventories $ 133.5 $ 150.1

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in the carrying value of Goodwill	The changes in the carrying value of Goodwill for the nine months ended September 30, 2020 were as follows: Goodwill Accumulated Impairment Losses Total Balance as of December 31, 2019 $ 235.1 $ (40.0 ) $ 195.1 Additions — — — Foreign currency fluctuations 5.8 0.5 6.3 Balance as of September 30, 2020 $ 240.9 $ (39.5 ) $ 201.4
Acquired Intangible Assets excluding Goodwill	The balances of acquired Intangible Assets, excluding Goodwill, as of September 30, 2020 and December 31, 2019 , were as follows: Customer Lists Trade Names Technology Total Balance as of September 30, 2020 Original cost $ 159.4 $ 33.1 $ 17.4 $ 209.9 Accumulated amortization (63.3 ) (11.0 ) (9.0 ) (83.3 ) Carrying value $ 96.1 $ 22.1 $ 8.4 $ 126.6 Weighted average original life (in years) 15 11 11 Balance as of December 31, 2019 Original cost $ 154.1 $ 31.8 $ 17.1 $ 203.0 Accumulated amortization (49.8 ) (8.2 ) (7.3 ) (65.3 ) Carrying value $ 104.3 $ 23.6 $ 9.8 $ 137.7 Weighted average original life (in years) 15 11 11
Estimated aggregate amortization expense of Intangible Assets	Estimated aggregate amortization expense based on the current carrying value of amortizable Intangible Assets for each of the five succeeding years and thereafter is as follows: Remaining 2020 $ 5.3 2021 19.7 2022 17.5 2023 16.0 2024 14.4 Thereafter 53.7 Total $ 126.6

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Summary of Outstanding Debt	Debt outstanding at September 30, 2020 and December 31, 2019 consisted of the following: September 30, December 31, Senior Unsecured Notes $ 300.0 $ 300.0 Credit Facility Borrowings 25.0 40.0 Secured Borrowings 1.7 2.4 Finance Lease Liabilities 0.1 0.2 Unamortized Debt Issuance Costs (3.2 ) (3.8 ) Total Debt 323.6 338.8 Less: Current Portion of Long-Term Debt (a) (16.0 ) (31.3 ) Long-Term Debt $ 307.6 $ 307.5 (a) Current portion of long-term debt as of September 30, 2020 includes a $15.0 million anticipated repayment on credit facility borrowings under our 2017 Credit Agreement, $0.9 million of current maturities of secured borrowings and $0.1 million of current maturities of finance lease liabilities.

Warranty (Tables)

Warranty (Tables)	9 Months Ended
	Sep. 30, 2020
Product Warranties Disclosures [Abstract]
Changes in warranty reserve	The changes in warranty reserves for the nine months ended September 30, 2020 and 2019 were as follows: Nine Months Ended September 30 2020 2019 Beginning balance $ 12.7 $ 13.1 Additions charged to expense 6.9 9.7 Foreign currency fluctuations — (0.1 ) Claims paid (8.6 ) (8.8 ) Ending balance $ 11.0 $ 13.9

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of derivative instruments on our Condensed Consolidated Balance Sheets	The fair value of derivative instruments on our Consolidated Balance Sheets as of September 30, 2020 and December 31, 2019 was as follows: Derivative Assets Derivative Liabilities Balance Sheet Location September 30, 2020 December 31, 2019 Balance Sheet Location September 30, 2020 December 31, 2019 Derivatives designated as hedging instruments: Foreign currency option contracts Other Current Assets $ 0.1 $ — Other Current Liabilities $ — $ — Foreign currency forward contracts Other Current Assets 2.2 2.5 Other Current Liabilities — — Foreign currency forward contracts Other Assets — — Other Liabilities 16.4 12.6 Derivatives not designated as hedging instruments: Foreign currency forward contracts Other Current Assets $ 1.4 $ 0.6 Other Current Liabilities $ 0.2 $ 0.3
Derivative Instruments, Gain (Loss) [Table Text Block]	The following tables include the amounts in the Consolidated Statements of Earnings in which the effects of cash flow hedges are recorded and the effects of cash flow hedge activity on these line items for the three and nine months ended September 30, 2020 and 2019: Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Total Amount of Gain (Loss) on Cash Flow Hedge Activity Total Amount of Gain (Loss) on Cash Flow Hedge Activity Total Amount of Gain (Loss) on Cash Flow Hedge Activity Total Amount of Gain (Loss) on Cash Flow Hedge Activity Net Sales $ 261.9 $ (0.1 ) $ 280.7 $ (0.1 ) $ 728.0 $ (0.1 ) $ 842.8 $ (0.1 ) Interest Income 0.8 0.6 0.8 0.7 2.5 2.1 2.5 2.1 Net Foreign Currency Transaction Loss (0.9 ) (7.3 ) (0.6 ) 7.1 (5.0 ) (7.6 ) (0.6 ) 8.1 The effect of foreign currency derivative instruments designated as hedges and of foreign currency derivative instruments not designated as hedges in our Consolidated Statements of Earnings for the three and nine months ended September 30, 2020 was as follows: Three Months Ended Nine Months Ended September 30, 2020 September 30, 2020 Foreign Currency Option Contracts Foreign Currency Forward Contracts Foreign Currency Option Contracts Foreign Currency Forward Contracts Derivatives in cash flow hedging relationships: Net (loss) gain recognized in Other Comprehensive Income (Loss), net of tax (a) $ (0.1 ) $ (5.8 ) $ (0.1 ) $ (1.6 ) Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales — (0.1 ) — (0.1 ) Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income — 0.5 — 1.6 Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Loss — (5.7 ) — (5.9 ) Derivatives not designated as hedging instruments: Net (loss) gain recognized in earnings (b) $ — $ (1.7 ) $ — $ (1.1 ) The effect of foreign currency derivative instruments designated as hedges and of foreign currency derivative instruments not designated as hedges in our Consolidated Statements of Earnings for the three and nine months ended September 30, 2019 was as follows: Three Months Ended Nine Months Ended September 30, 2019 September 30, 2019 Foreign Currency Option Contracts Foreign Currency Forward Contracts Foreign Currency Option Contracts Foreign Currency Forward Contracts Derivatives in cash flow hedging relationships: Net gain (loss) recognized in Other Comprehensive (Loss) Income, net of tax (a) $ — $ 7.2 $ (0.2 ) $ 11.3 Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income — 0.5 — 1.6 Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction (Gain) Loss — 5.4 — 6.2 Derivatives not designated as hedging instruments: Net gain (loss) recognized in earnings (b) $ — $ 0.6 $ — $ (0.2 ) (a) Net change in the fair value of the effective portion classified in Other Comprehensive (Loss) Income. (b) Classified in Net Foreign Currency Transaction Loss.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Fair value measurements of assets and liabilities	Our population of assets and liabilities subject to fair value measurements at September 30, 2020 is as follows: Fair Value Level 1 Level 2 Level 3 Assets: Foreign currency forward exchange contracts $ 4.9 $ — $ 4.9 $ — Foreign currency options contracts 0.1 — 0.1 — Total Assets $ 5.0 $ — $ 5.0 $ — Liabilities: Foreign currency forward exchange contracts $ 17.9 $ — $ 17.9 $ — Contingent consideration 1.9 — — 1.9 Total Liabilities $ 19.8 $ — $ 17.9 $ 1.9 Our population of assets and liabilities subject to fair value measurements at December 31, 2019 is as follows: Fair Value Level 1 Level 2 Level 3 Assets: Foreign currency forward exchange contracts $ 6.4 $ — $ 6.4 $ — Total Assets $ 6.4 $ — $ 6.4 $ — Liabilities: Foreign currency forward exchange contracts $ 16.2 $ — $ 16.2 $ — Contingent consideration $ 2.1 — — 2.1 Total Liabilities $ 18.3 $ — $ 16.2 $ 2.1

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Components of Accumulated Other Comprehensive Loss, net of tax	Components of Accumulated Other Comprehensive Loss, net of tax, within the Consolidated Balance Sheets, are as follows: September 30, 2020 December 31, 2019 Foreign currency translation adjustments $ (30.7 ) $ (36.3 ) Pension and retiree medical benefits (0.7 ) (0.7 ) Cash flow hedge 1.2 (1.5 ) Total Accumulated Other Comprehensive Loss $ (30.2 ) $ (38.5 )
Changes in components of Accumulated Other Comprehensive Loss, net of tax	The changes in components of Accumulated Other Comprehensive Loss, net of tax, are as follows: Foreign Currency Translation Adjustments Pension and Post-Retirement Benefits Cash Flow Hedge Total December 31, 2019 $ (36.3 ) $ (0.7 ) $ (1.5 ) $ (38.5 ) Other comprehensive (loss) income before reclassifications 5.6 — (1.6 ) 4.0 Amounts reclassified from Accumulated Other Comprehensive Loss — — 4.3 4.3 Net current period other comprehensive (loss) income 5.6 — 2.7 8.3 September 30, 2020 $ (30.7 ) $ (0.7 ) $ 1.2 $ (30.2 )

Earnings Attributable to Tenn_2

Earnings Attributable to Tennant Company Per Share (Tables)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings (Loss) per Share	The computations of Basic and Diluted Earnings per Share were as follows: Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Numerator: Net Earnings Attributable to Tennant Company $ 11.7 $ 14.6 $ 31.2 $ 34.8 Denominator: Basic - Weighted Average Shares Outstanding 18,371,883 18,134,909 18,335,430 18,086,962 Effect of dilutive securities: Share-based compensation plans 276,445 353,039 288,537 315,967 Diluted - Weighted Average Shares Outstanding 18,648,328 18,487,948 18,623,967 18,402,929 Basic Earnings per Share $ 0.64 $ 0.81 $ 1.70 $ 1.93 Diluted Earnings per Share $ 0.63 $ 0.79 $ 1.68 $ 1.89

Newly Adopted Accounting Pron_3

Newly Adopted Accounting Pronouncements (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
December 31, 2019 balance	$ 3.6
Charged to costs and expenses	1.5
Deductions	(1.2)	[1]
March 31, 2020 balance	$ 3.9
[1]	Includes accounts determined to be uncollectible and charged against reserves

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Net Sales	$ 261.9	$ 280.7	$ 728	$ 842.8
Sales Direct to Consumer
Disaggregation of Revenue [Line Items]
Net Sales	177.3	189.7	488.2	563.5
Sales to Distributors
Disaggregation of Revenue [Line Items]
Net Sales	84.6	91	239.8	279.3
Equipment
Disaggregation of Revenue [Line Items]
Net Sales	167.6	190	456.3	552.9
Parts and Consumables
Disaggregation of Revenue [Line Items]
PriorPeriodRevenueDisaggregationAdjustment		20.7		4.9
Net Sales	52.7	46.9	150.2	158.2
Specialty Surface Coatings
Disaggregation of Revenue [Line Items]
Net Sales	5.3	6.9	16.6	20.2
Services and Other
Disaggregation of Revenue [Line Items]
PriorPeriodRevenueDisaggregationAdjustment		2.8		28.8
Net Sales	36.3	36.9	104.9	111.5
Americas
Disaggregation of Revenue [Line Items]
Net Sales	167.7	186.1	466.6	536.4
EMEA
Disaggregation of Revenue [Line Items]
Net Sales	69.5	69.7	196.3	228.6
Asia Pacific
Disaggregation of Revenue [Line Items]
Net Sales	$ 24.7	$ 24.9	$ 65.1	$ 77.8

Revenue from Contracts with C_4

Revenue from Contracts with Customers (Details 2) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Contract with Customer, Contract Liability [Roll Forward]
Beginning balance	$ 13.7	$ 16.7
Additions to sales incentive accrual	15	21
Contract payments	15.6	24.4
Foreign currency fluctuations	(0.1)	(0.1)
Ending balance	$ 13	$ 13.2

Revenue from Contracts with C_5

Revenue from Contracts with Customers (Details 3) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Dec. 31, 2019	Jan. 04, 2019
Disaggregation of Revenue [Line Items]
Deferred Revenue, Current			$ 6.7	$ 6.8
Deferred Revenue, Noncurrent			3.5	3.9
Movement in Deferred Revenue [Roll Forward]
Beginning balance	$ 10.7	$ 8.5
Increase in deferred revenue representing our obligation to satisfy future performance obligations	15.3	16.9
Deferred Revenue Addition from Acquisition				1.4	$ 0
Decrease in deferred revenue for amounts recognized in Net Sales for satisfied performance obligations	(15)	(16.8)
Foreign currency fluctuations	(0.8)	(0.1)
Ending balance	10.2	9.9
Revenue, Performance Obligation Satisfied over Time [Abstract]
Remaining 2019			4.6
2020			2.7
2021			1.6
2022			0.8
2023			0.4
Thereafter			0.1
Total	$ 10.2	$ 9.9	$ 10.2	$ 10.7
Prepaid Maintenance Contract Duration, Minimum
Disaggregation of Revenue [Line Items]
Standard Prepaid Maintenance Contract Time Period	12 years
Prepaid Maintenance Contract Duration, Maximum
Disaggregation of Revenue [Line Items]
Standard Prepaid Maintenance Contract Time Period	60 years

Management Actions (Details)

Management Actions (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Actions [Abstract]
Product Discontinuation Reserve		$ 1.7
Restructuring Reserve [Roll Forward]
Restructuring Charges, net of noncash expenses				$ 2.2
Restructuring Reserve beginning balance		4.5
Cash Payments		(4.2)	$ (2.5)
Foreign currency adjustments		0.1	(1.3)
Restructuring Reserve ending balance	$ 2.3	2.3	4.5
Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			4.8
Restructuring Reserve [Roll Forward]
Restructuring Charges			4.8
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			0.3
Restructuring Reserve [Roll Forward]
Restructuring Charges			0.3
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			6.1
Restructuring Reserve [Roll Forward]
Restructuring Charges			6.1
Selling and Administrative Expense
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		2.4	4.5
Restructuring Reserve [Roll Forward]
Restructuring Charges		2.4	$ 4.5
China [Member]
Restructuring Cost and Reserve [Line Items]
EstimatedRestructuringCharges		$ 2.9
Approximate time anticipated savings will offset the restructuring charge		1 year
China [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 1.6
Restructuring Reserve [Roll Forward]
Restructuring Charges		1.6
China [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		1.3
Restructuring Reserve [Roll Forward]
Restructuring Charges		1.3
China [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0.5
Restructuring Reserve [Roll Forward]
Restructuring Charges		0.5
China [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0.3
Restructuring Reserve [Roll Forward]
Restructuring Charges		0.3
China [Member] | Selling and Administrative Expense
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		1.1
Restructuring Reserve [Roll Forward]
Restructuring Charges		1.1
JAPAN
Restructuring Cost and Reserve [Line Items]
EstimatedRestructuringCharges		$ 2
Approximate time anticipated savings will offset the restructuring charge		1 year
JAPAN | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 1.6
Restructuring Reserve [Roll Forward]
Restructuring Charges		1.6
JAPAN | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		1.1
Restructuring Reserve [Roll Forward]
Restructuring Charges		1.1
JAPAN | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0.1
Restructuring Reserve [Roll Forward]
Restructuring Charges		0.1
JAPAN | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0.1	0.5
Restructuring Reserve [Roll Forward]
Restructuring Charges	$ 0.1	0.5
JAPAN | Selling and Administrative Expense
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		1.5
Restructuring Reserve [Roll Forward]
Restructuring Charges		$ 1.5

Acquisition (Details 1)

Acquisition (Details 1) - USD ($) $ in Millions	Jan. 04, 2019	Sep. 30, 2020	Dec. 31, 2019
Trade Names
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		11 years	11 years
Customer Lists
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		15 years	15 years
Gaomei
Business Acquisition [Line Items]
Business Acquisition, Name of Acquired Entity	Hefei Gaomei Cleaning Machines Co., Ltd. and Anhui Rongen Environmental Protection Technology Co., Ltd. (collectively "Gaomei")
Business Acquisition, Goodwill, Expected Tax Deductible Amount	$ 0
Business Combination, Working Capital Adjustment			$ (0.2)
Recorded Unconditional Purchase Obligation	11.3
Purchase Obligation, Due in Second Year			11.3
Gaomei | Minimum
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Liability	1.4
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Gaomei | Maximum
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Liability	3.1
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		15 years
Fair Value | Contingent Consideration
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Liability	$ 4.7	$ 1.9	$ 2.1

Acquisition (Details 2)

Acquisition (Details 2) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
LIABILITIES
Goodwill	$ 201.4	$ 195.1

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions		Sep. 30, 2020	Dec. 31, 2019
Inventories carried at LIFO:
Finished goods		$ 44.1	$ 50.9
Raw materials, production parts and work-in-process		25.1	32.5
LIFO reserve	[1]	(31.8)	(33.4)
Total LIFO inventories		37.4	50
Inventories carried at FIFO:
Inventory, Finished goods, FIFO		56.4	60.1
Raw materials, production parts and work-in-process		39.7	40
Total FIFO inventories		96.1	100.1
Total inventories		$ 133.5	$ 150.1
[1]	(a) The difference between replacement cost and the stated LIFO inventory value is not materially different from the reserve for the LIFO valuation method.

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Goodwill, Gross
Balance, beginning of period			$ 235.1
Purchase accounting adjustments			0
Foreign currency fluctuations			5.8
Balance, end of period	$ 240.9		240.9		$ 235.1
Goodwill, Impairment Loss			0
Accumulated Impairment Losses
Balance, beginning of period			(40)
Foreign currency fluctuations			0.5
Balance, end of period	(39.5)		(39.5)		(40)
Goodwill, Net
Balance, beginning of period			195.1
Purchase accounting adjustments			0
Foreign currency fluctuations			6.3
Balance, end of period	201.4		201.4		195.1
Acquired Finite-lived Intangible Assets
Original cost	209.9		209.9		203
Accumulated amortization	(83.3)		(83.3)		(65.3)
Carrying value	126.6		126.6		137.7
Purchase of Intangible Assets			0.1	$ 0.5
Amortization expense	5.3	$ 5.1	15.3	$ 16.6
Estimated aggregate amortization expense of Intangible Assets
Remaining 2019	5.3		5.3
2020	19.7		19.7
2021	17.5		17.5
2022	16		16
2023	14.4		14.4
Thereafter	53.7		53.7
Total	126.6		126.6
Customer Lists
Acquired Finite-lived Intangible Assets
Original cost	159.4		159.4		154.1
Accumulated amortization	(63.3)		(63.3)		(49.8)
Carrying value	96.1		$ 96.1		$ 104.3
Weighted-average original life (in years)			15 years		15 years
Trade Names
Acquired Finite-lived Intangible Assets
Original cost	33.1		$ 33.1		$ 31.8
Accumulated amortization	(11)		(11)		(8.2)
Carrying value	22.1		$ 22.1		$ 23.6
Weighted-average original life (in years)			11 years		11 years
Technology
Acquired Finite-lived Intangible Assets
Original cost	17.4		$ 17.4		$ 17.1
Accumulated amortization	(9)		(9)		(7.3)
Carrying value	$ 8.4		$ 8.4		$ 9.8
Weighted-average original life (in years)			11 years		11 years

Debt (Details 1)

Debt (Details 1) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)	Dec. 31, 2019USD ($)
Line of Credit Facility
Debt, Current	$ 16	$ 31.3
Line of Credit Facility, Commitment Fee Amount	$ 0.4
Debt, Weighted Average Interest Rate	5.30%
Debt, Weighted Average Interest Rate, net of Currency Swap Contract	4.30%
Revolving Credit Facility
Line of Credit Facility
Outstanding Borrowings	$ 25
Revolving Credit Facility | JPMorgan, 2017 Credit Agreement
Line of Credit Facility
Debt Instrument, Covenant, Indebtedness to Adjusted EBITDA Ratio, Maximum	4
Debt Instrument, Covenant, Adjusted EBITDA to Interest Expense Ratio, Maximum	3.50
Debt Instrument, Covenant, Senior Secured Net Indebtedness to Adjusted EBITDA Ratio, Maximum	3.50
Line of Credit
Line of Credit Facility
Debt, Current	$ 0.9
Letter of Credit
Line of Credit Facility
Debt Instrument, Unused Borrowing Capacity, Amount	171.7
Letters of Credit Outstanding, Amount	$ 3.3

Debt (Details 2)

Debt (Details 2) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument
Total Debt	$ 323.6	$ 338.8
Debt Instrument, Unamortized Debt Issuance Costs, Noncurrent, net	(3.2)	(3.8)
Long-Term Portion	307.6	307.5
Current Portion of Long-Term Debt	16	31.3
less: Finance Lease, Liability, Current	0.1
Credit Facility [Domain]
Debt Instrument
Current Portion of Long-Term Debt	15
Line of Credit
Debt Instrument
Debt, Current, Net Of Unamortized Debt Issuance Costs	(16)	(31.3)
Current Portion of Long-Term Debt	0.9
Secured Borrowings
Debt Instrument
Total Debt	1.7	2.4
Capital Lease Obligations
Debt Instrument
Total Debt	0.1	0.2
JPMorgan, 2017 Credit Agreement | Line of Credit
Debt Instrument
Total Debt	25	40
Bonds
Debt Instrument
Total Debt	$ 300	$ 300

Warranty (Details)

Warranty (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Product Warranties Disclosures [Abstract]
Machine warranty, range maximum (in years)	4 years
Period of time following a sale the majority of claims are paid, range maximum (in years)	9 months
Changes in warranty reserves
Beginning balance	$ 12.7	$ 13.1
Additions charged to expense	6.9	9.7
Foreign currency fluctuations	0	(0.1)
Claims paid	(8.6)	(8.8)
Ending balance	$ 11	$ 13.9

Warranty (Details 2)

Warranty (Details 2)	9 Months Ended
	Sep. 30, 2020
Product Warranties Disclosures [Abstract]
Machine warranty, range minimum (in years)	1 year
Period of time following a sale the majority of claims are paid, range minimum (in years)	6 months

Derivatives (Details 1)

Derivatives (Details 1) € in Millions, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 30, 2022EUR (€)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2020EUR (€)	Sep. 30, 2019USD ($)	Sep. 30, 2020EUR (€)	Dec. 31, 2019USD ($)	Dec. 31, 2019EUR (€)
Derivatives designated as hedging instruments
Derivatives, Fair Value [Line Items]
Derivative, Term of Contract				1 year	1 year
Cash Flow Hedge Loss to be Reclassified within Twelve Months				$ 2.1
Derivatives designated as hedging instruments | Foreign currency option contracts
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		$ 8.2		8.2				$ 9.8
Derivative Asset, Current		0.1		0.1				0
Derivative Liability, Current		0		0				0
Derivatives designated as hedging instruments | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		2.8		2.8				3
Derivative Asset, Current		2.2		2.2				2.5
Fair Value Asset Derivatives		0		0				0
Derivative Liability, Current		0		0				0
Fair Value Liability Derivatives		16.4		16.4				12.6
Derivatives designated as hedging instruments | Cross currency swap
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount | €							€ 161.4		€ 166.8
Aggregate scheduled interest payments over the course of the loan and related swaps | €					€ 11.4
Derivatives designated as hedging instruments | Cross currency swap | Scenario, Forecast
Derivatives, Fair Value [Line Items]
Debt Instrument, Periodic Payment, Principal | €	€ 150
Derivatives not designated as hedging instruments | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		55.4		55.4				41.9
Derivative Asset, Current		1.4		1.4				0.6
Derivative Liability, Current		0.2		0.2				$ 0.3
Cash Flow Hedge | Foreign currency option contracts
Derivatives, Fair Value [Line Items]
Net gain (loss) reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Losses		0	$ 0	0		$ 0
Cash Flow Hedge | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Net gain (loss) reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Losses		$ (5.7)	$ 5.4	$ (5.9)		$ 6.2

Derivatives (Details 2)

Derivatives (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Revenues	$ 261.9	$ 280.7	$ 728	$ 842.8
Interest Income	0.8	0.8	2.5	2.5
Net Foreign Currency Transaction Losses	(0.9)	(0.6)	(5)	(0.6)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	(0.1)	(0.1)	(0.1)	(0.1)
Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	0.6	0.7	2.1	2.1
Foreign Currency Gain (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Cash Flow Hedge Ineffectiveness	$ (7.3)	$ 7.1	$ (7.6)	$ 8.1

Derivatives (Details 3)

Derivatives (Details 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Foreign currency option contracts | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in earnings	$ 0	$ 0	$ 0	$ 0
Foreign currency option contracts | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in Other Comprehensive (Loss) Income, net of tax	(0.1)	0	(0.1)	(0.2)
Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income	0	0	0	0
Net gain (loss) reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Losses	0	0	0	0
Foreign currency forward exchange contracts | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in earnings	(1.7)	0.6	(1.1)	(0.2)
Foreign currency forward exchange contracts | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in Other Comprehensive (Loss) Income, net of tax	(5.8)	7.2	(1.6)	11.3
Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income	0.5	0.5	1.6	1.6
Net gain (loss) reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Losses	$ (5.7)	$ 5.4	$ (5.9)	$ 6.2

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019	Jan. 04, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Fair Value Disclosure	$ 337.5	$ 357.2
Liabilities:
Total Debt	323.6	338.8
Level 1
Assets:
Total Assets	0	0
Liabilities:
Total Liabilities	0	0
Level 1 | Foreign currency forward exchange contracts
Assets:
Foreign currency contract, asset fair value	0	0
Liabilities:
Foreign currency contract, liability fair value	0	0
Level 1 | Foreign currency option contracts
Assets:
Foreign currency contract, asset fair value	0
Level 1 | Contingent Consideration
Liabilities:
Contingent Consideration	0	0
Level 2
Assets:
Total Assets	5	6.4
Liabilities:
Total Liabilities	17.9	16.2
Level 2 | Foreign currency forward exchange contracts
Assets:
Foreign currency contract, asset fair value	4.9	6.4
Liabilities:
Foreign currency contract, liability fair value	17.9	16.2
Level 2 | Foreign currency option contracts
Assets:
Foreign currency contract, asset fair value	0.1
Level 2 | Contingent Consideration
Liabilities:
Contingent Consideration	0	0
Level 3
Assets:
Total Assets	0	0
Liabilities:
Total Liabilities	1.9	2.1
Level 3 | Foreign currency forward exchange contracts
Assets:
Foreign currency contract, asset fair value	0	0
Liabilities:
Foreign currency contract, liability fair value	0	0
Level 3 | Foreign currency option contracts
Assets:
Foreign currency contract, asset fair value	0
Level 3 | Contingent Consideration
Liabilities:
Contingent Consideration	1.9	2.1
Fair Value
Assets:
Total Assets	5	6.4
Liabilities:
Total Liabilities	19.8	18.3
Fair Value | Foreign currency forward exchange contracts
Assets:
Foreign currency contract, asset fair value	4.9	6.4
Liabilities:
Foreign currency contract, liability fair value	17.9	16.2
Fair Value | Foreign currency option contracts
Assets:
Foreign currency contract, asset fair value	0.1
Fair Value | Contingent Consideration
Liabilities:
Contingent Consideration	$ 1.9	$ 2.1	$ 4.7

Retirement Benefit Plans (Detai

Retirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Plan contributions	$ 0.1	$ 0.1	$ 0.2	$ 0.3
Postretirement Medical Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans
Plan contributions	$ 0.1	$ 0.3	$ 0.4	$ 0.7

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details 1) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Equity [Abstract]
Foreign currency translation adjustments	$ (30.7)	$ (36.3)
Pension and retiree medical benefits	(0.7)	(0.7)
Cash flow hedge	1.2	(1.5)
Total Accumulated Other Comprehensive Loss	$ (30.2)	$ (38.5)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Loss (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Components of Other Comprehensive Loss
December 31, 2018			$ (38.5)
Other comprehensive (loss) income before reclassifications			4
Amounts reclassified from Accumulated Other Comprehensive Loss			4.3
Total Other Comprehensive (Loss) Income, net of tax	$ 11.8	$ (11.2)	8.3	$ (10.1)
September 30, 2019	(30.2)		(30.2)
Foreign Currency Translation Adjustments
Components of Other Comprehensive Loss
December 31, 2018			(36.3)
Other comprehensive (loss) income before reclassifications			5.6
Amounts reclassified from Accumulated Other Comprehensive Loss			0
Total Other Comprehensive (Loss) Income, net of tax			5.6
September 30, 2019	(30.7)		(30.7)
Pension and Post Retirement Benefits
Components of Other Comprehensive Loss
December 31, 2018			(0.7)
Other comprehensive (loss) income before reclassifications			0
Amounts reclassified from Accumulated Other Comprehensive Loss			0
Total Other Comprehensive (Loss) Income, net of tax			0
September 30, 2019	(0.7)		(0.7)
Cash Flow Hedge
Components of Other Comprehensive Loss
December 31, 2018			(1.5)
Other comprehensive (loss) income before reclassifications			(1.6)
Amounts reclassified from Accumulated Other Comprehensive Loss			4.3
Total Other Comprehensive (Loss) Income, net of tax			2.7
September 30, 2019	$ 1.2		$ 1.2

Income Taxes (Details)

Income Taxes (Details) $ in Millions	Sep. 30, 2020USD ($)
Income Tax Disclosure [Abstract]
Liability for unrecognized tax benefits	$ 7.1
Unrecognized tax benefits, income tax penalties and interest accrued	0.7
Unrecognized tax benefits that would impact the effective tax rate	$ 6.9

Share-Based Compensation (Detai

Share-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Payment Arrangement, Expense	$ 1.9	$ 3.7	$ 4.7	$ 8.7
Excess Tax Benefit on Stock Plans			$ 0.3	0.7
Restricted shares
Share-based Compensation Arrangement by Share-based Payment Award
Shares granted			17,348
Vesting period of new awards granted			3 years
Fair value of shares vested			$ 0.7	$ 1
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Weighted average grant date fair value, in dollars per share			$ 81.07

Earnings Attributable to Tenn_3

Earnings Attributable to Tennant Company Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net Earnings Attributable to Tennant Company	$ 11.7	$ 14.6	$ 31.2	$ 34.8
Denominator:
Basic - Weighted Average Shares Outstanding	18,371,883	18,134,909	18,335,430	18,086,962
Effect of dilutive securities:
Share-based compensation plans	276,445	353,039	288,537	315,967
Diluted - Weighted Average Shares Outstanding	18,648,328	18,487,948	18,623,967	18,402,929
Basic Earnings (Loss) per Share	$ 0.64	$ 0.81	$ 1.70	$ 1.93
Diluted Earnings (Loss) per Share	$ 0.63	$ 0.79	$ 1.68	$ 1.89
Anti-dilutive securities excluded from earnings per share calculation	578,858	485,853	620,605	687,972

Uncategorized Items - form10-q9

Label	Element	Value
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	$ 18,700,000
Finance Lease, Principal Payments	us-gaap_FinanceLeasePrincipalPayments	200,000
Operating Lease, Payments	us-gaap_OperatingLeasePayments	$ 17,000,000