Wolverine World Wide (WWW) 10-Q 5 Nov 20 2020 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 26, 2020	Oct. 26, 2020
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 26, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Entity Registrant Name	WOLVERINE WORLD WIDE INC /DE/
Entity Central Index Key	0000110471
Current Fiscal Year End Date	--01-02
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		82,071,781
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Small Business	false
Document Transition Report	false
Document Quarterly Report	true
Entity File Number	001-06024
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	38-1185150
Entity Address, Address Line One	9341 Courtland Drive N.E.
Entity Address, City or Town	Rockford
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	49351
City Area Code	(616)
Local Phone Number	866-5500
Title of 12(b) Security	Common Stock, $1 Par Value
Trading Symbol	WWW
Security Exchange Name	NYSE
Entity Interactive Data Current	Yes
Entity Shell Company	false

Consolidated Condensed Statemen

Consolidated Condensed Statements of Operations and Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Income Statement [Abstract]
Revenue	$ 493.1	$ 574.3	$ 1,281.5	$ 1,666.3
Cost of goods sold	291.1	331	750.5	972.4
Gross profit	202	243.3	531	693.9
Selling, general and administrative expenses	157.5	165.9	457.2	498.6
Environmental and other related costs, net of recoveries	1.9	9.1	6.8	19.1
Operating profit	42.6	68.3	67	176.2
Other expenses:
Interest expense, net	12.8	8.2	31.1	21.8
Debt extinguishment and other costs	0	0	0.2	0
Other income, net	(0.6)	(0.9)	(2.9)	(3.2)
Total other expenses	12.2	7.3	28.4	18.6
Earnings before income taxes	30.4	61	38.6	157.6
Income tax expense	8.7	12.4	6	28.2
Net earnings	21.7	48.6	32.6	129.4
Less: net earnings (loss) attributable to noncontrolling interests	(0.7)	(0.1)	(1.2)	0
Net earnings attributable to Wolverine World Wide, Inc.	$ 22.4	$ 48.7	$ 33.8	$ 129.4
Net earnings per share (see Note 3):
Basic	$ 0.27	$ 0.57	$ 0.41	$ 1.46
Diluted	$ 0.27	$ 0.57	$ 0.41	$ 1.44
Comprehensive income	$ 25.2	$ 45.6	$ 25.6	$ 128.8
Less: comprehensive loss attributable to noncontrolling interests	(0.5)	(0.5)	(2.1)	(0.3)
Comprehensive income attributable to Wolverine World Wide, Inc.	$ 25.7	$ 46.1	$ 27.7	$ 129.1
Cash dividends declared per share	$ 0.10	$ 0.10	$ 0.30	$ 0.30

Consolidated Condensed Balance

Consolidated Condensed Balance Sheets - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019
Current assets:
Cash and cash equivalents	$ 342	$ 180.6	$ 125.2
Accounts receivable, less allowances of $33.4, $26.7, and $24.0	332.1	331.2	357.3
Inventories:
Finished products, net	318.1	342	410
Raw materials and work-in-process, net	7.6	6.2	7.7
Total inventories	325.7	348.2	417.7
Prepaid expenses and other current assets	42.2	107.1	48.4
Total current assets	1,042	967.1	948.6
Property, plant and equipment:
Gross cost	326.6	325	399.1
Accumulated depreciation	(200.3)	(184)	(256.1)
Property plant and equipment net	126.3	141	143
Lease right-of-use assets, net	148.3	160.8	163.9
Other assets:
Goodwill	437.8	438.9	437
Indefinite-lived intangibles	604.5	604.5	604.5
Amortizable intangibles, net	74	77.8	79.6
Deferred Income Tax Assets, Net	1.8	2.9	3.2
Other	66.4	87	88.7
Total other assets	1,184.5	1,211.1	1,213
Total assets	2,501.1	2,480	2,468.5
Current liabilities:
Accounts payable	191.8	202.1	155.6
Accrued salaries and wages	22.4	20.8	25.5
Other accrued liabilities	148.7	157.9	116
Operating Lease, Liability, Current	34.6	34.1	33.5
Current maturities of long-term debt	162.5	12.5	10
Borrowings under revolving credit agreements	0	360	493.3
Total current liabilities	560	787.4	833.9
Long-term debt, less current maturities	714.1	425.9	430.7
Accrued pension liabilities	109.2	109.7	92.3
Deferred Income Tax Liabilities, Net	85	99	112
Operating Lease, Liability, Noncurrent	135	147.2	151
Other liabilities	132.3	132.4	54.7
Wolverine World Wide, Inc. stockholders’ equity:
Common Stock - par value $1, authorized 320,000,000 shares; shares issued (including shares in treasury): September 26, 2020: 110,117,417 shares; December 28, 2019: 108,329,250 shares; September 28, 2019: 108,058,005 shares	110.1	108.3	108.1
Additional paid-in capital	239.8	233.4	221.3
Retained earnings	1,272.4	1,263.3	1,273.2
Accumulated other comprehensive loss	(108.2)	(102.1)	(88.6)
Cost of shares in treasury: September 26, 2020: 28,148,131 shares; December 28, 2019: 27,181,512 shares; September 28, 2019: 26,992,711 shares	(760)	(736.2)	(731.1)
Total Wolverine World Wide, Inc. stockholders’ equity	754.1	766.7	782.9
Noncontrolling interest	11.4	11.7	11
Total stockholders’ equity	765.5	778.4	793.9
Total liabilities and stockholders’ equity	$ 2,501.1	$ 2,480	$ 2,468.5

Consolidated Condensed Balanc_2

Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019
Statement of Financial Position [Abstract]
Accounts receivable allowance	$ 33.4	$ 26.7	$ 24
Common stock, par value	$ 1	$ 1	$ 1
Common stock, shares authorized	320,000,000	320,000,000	320,000,000
Common stock, shares issued (including shares in treasury)	110,117,417	108,329,250	108,058,005
Treasury shares	28,148,131	27,181,512	26,992,711

Consolidated Condensed Statem_2

Consolidated Condensed Statements of Cash Flow - USD ($) $ in Millions	9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019
OPERATING ACTIVITIES
Net earnings	$ 32.6	$ 129.4
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	23.8	23.3
Deferred income taxes	(12.8)	0.3
Stock-based compensation expense	21.5	17.3
Pension and SERP expense	6.4	4.2
Debt Related Commitment Fees and Debt Issuance Costs	0.2	0
Environmental and other related costs, net of cash payments	25.2	(3.7)
Other	(0.6)	(9.5)
Changes in operating assets and liabilities:
Accounts receivable	(1.7)	0.3
Inventories	21.6	(94.8)
Other operating assets	9.9	(1.2)
Accounts payable	(9.2)	(46.9)
Income taxes payable	15.1	9.3
Other operating liabilities	3.5	(12)
Net cash provided by operating activities	135.5	16
INVESTING ACTIVITIES
Payments to Acquire Businesses, Net of Cash Acquired	(5.5)	(15.1)
Additions to property, plant and equipment	(6)	(28.7)
Proceeds from Sales of Assets, Investing Activities	0.1	0.1
Investment in joint ventures	(3.5)	(8.5)
Proceeds from Life Insurance Policy	25.6	0
Other	(1.1)	(1.2)
Net cash provided by (used in) investing activities	9.6	(53.4)
FINANCING ACTIVITIES
Repayments of Lines of Credit	(898)	(249)
Proceeds from Lines of Credit	538	617.3
Proceeds from Issuance of Debt	471	0
Payments on long-term debt	(28.5)	(5)
Payments of debt issuance costs	(6.4)	(0.3)
Cash dividends paid	(25.4)	(25.4)
Purchases of common stock for treasury	(21)	(314.2)
Payment, Tax Withholding, Share-based Payment Arrangement	(20.1)	(16.7)
Proceeds from the exercise of stock options	4	7
Contributions from noncontrolling interests	1.8	5.7
Net cash provided by financing activities	15.4	19.4
Effect of foreign exchange rate changes	0.9	0.1
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	161.4	(17.9)
Cash and cash equivalents at beginning of the year	180.6	143.1
Cash and cash equivalents at end of the quarter	$ 342	$ 125.2

Consolidated Statement of Share

Consolidated Statement of Shareholders' Equity Statement - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 29, 2018	$ 991.6	$ 107.6	$ 201.4	$ 1,169.7	$ (88.3)	$ (404.4)	$ 5.6
Net earnings attributable to Wolverine World Wide, Inc.	129.4			129.4
Less: net earnings (loss) attributable to noncontrolling interests	0						0
Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax	129.4
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0.3				(0.3)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest							(0.3)
Other Comprehensive Income (Loss), Net of Tax	(0.6)
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	(4)	0.1	(4.1)
Stock Issued During Period, Value, Stock Options Exercised	7	0.4	6.6
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	17.3		17.3
Dividends, Common Stock, Cash	(25.9)			(25.9)
Stock Issued During Period, Value, Treasury Stock Reissued	0.3		0.1			0.2
Purchase of Common Stock for Treasury	(314.2)					(314.2)
Treasury Stock, Value, Acquired, Cost Method	(12.7)					(12.7)
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	5.7						5.7
Ending Balance at Sep. 28, 2019	793.9	108.1	221.3	1,273.2	(88.6)	(731.1)	11
Beginning Balance at Jun. 29, 2019	855.2	108	213.2	1,232.8	(86)	(624.3)	11.5
Net earnings attributable to Wolverine World Wide, Inc.	48.7			48.7
Less: net earnings (loss) attributable to noncontrolling interests	(0.1)						(0.1)
Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax	48.6
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	2.6				(2.6)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest							(0.4)
Other Comprehensive Income (Loss), Net of Tax	(3)
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	(0.1)	0.1	(0.2)
Stock Issued During Period, Value, Stock Options Exercised	1.2	0	1.2
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	7.1		7.1
Dividends, Common Stock, Cash	(8.3)			(8.3)
Stock Issued During Period, Value, Treasury Stock Reissued	0.1		0			0.1
Purchase of Common Stock for Treasury	(106.8)					(106.8)
Treasury Stock, Value, Acquired, Cost Method	(0.1)					(0.1)
Ending Balance at Sep. 28, 2019	793.9	108.1	221.3	1,273.2	(88.6)	(731.1)	11
Beginning Balance at Dec. 28, 2019	778.4	108.3	233.4	1,263.3	(102.1)	(736.2)	11.7
Net earnings attributable to Wolverine World Wide, Inc.	33.8			33.8
Less: net earnings (loss) attributable to noncontrolling interests	(1.2)						(1.2)
Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax	32.6
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	6.1				(6.1)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest							(0.9)
Other Comprehensive Income (Loss), Net of Tax	(7)
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	(17.2)	1.5	(18.7)
Stock Issued During Period, Value, Stock Options Exercised	3.9	0.3	3.6
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	21.5		21.5
Dividends, Common Stock, Cash	(24.7)			(24.7)
Stock Issued During Period, Value, Treasury Stock Reissued	0.1					0.1
Purchase of Common Stock for Treasury	(21)					(21)
Treasury Stock, Value, Acquired, Cost Method	(2.9)					(2.9)
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	1.8						1.8
Ending Balance at Sep. 26, 2020	765.5	110.1	239.8	1,272.4	(108.2)	(760)	11.4
Beginning Balance at Jun. 27, 2020	735.9	110	227.1	1,258.3	(111.5)	(759.9)	11.9
Net earnings attributable to Wolverine World Wide, Inc.	22.4			22.4
Less: net earnings (loss) attributable to noncontrolling interests	(0.7)						(0.7)
Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax	21.7
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(3.3)				3.3
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest							0.2
Other Comprehensive Income (Loss), Net of Tax	3.5
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	(0.2)	0	(0.2)
Stock Issued During Period, Value, Stock Options Exercised	1.7	0.1	1.6
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	11.3		11.3
Dividends, Common Stock, Cash	(8.3)			(8.3)
Stock Issued During Period, Value, Treasury Stock Reissued	0		0			0
Treasury Stock, Value, Acquired, Cost Method	(0.1)					(0.1)
Ending Balance at Sep. 26, 2020	$ 765.5	$ 110.1	$ 239.8	$ 1,272.4	$ (108.2)	$ (760)	$ 11.4

Statement of Shareholders' Equi

Statement of Shareholders' Equity (Statement) - Parenthetical - $ / shares	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	11,519	(1,917)	1,497,072	36,588
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	99,381	62,114	291,095	412,211
Cash dividends declared per share	$ 0.10	$ 0.10	$ 0.30	$ 0.30
Stock Issued During Period, Shares, Treasury Stock Reissued	1,462	1,831	4,230	5,831
Treasury Stock, Shares, Acquired	0	(4,250,070)	(877,624)	(10,730,962)
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	(3,056)	(3,440)	(93,225)	(361,899)

Summary of Significant Accounti

Summary of Significant Accounting Policies (Notes)	9 Months Ended
	Sep. 26, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	BASIS OF PRESENTATION Nature of Operations Wolverine World Wide, Inc. (the “Company”) is a leading designer, marketer and licensor of a broad range of quality casual footwear and apparel; performance outdoor and athletic footwear and apparel; kids’ footwear; industrial work shoes, boots and apparel; and uniform shoes and boots. The Company’s portfolio of owned and licensed brands includes: Bates ® , Cat ® , Chaco ® , Harley-Davidson ® , Hush Puppies ® , Hytest ® , Keds ® , Merrell ® , Saucony ® , Sperry ® , Stride Rite ® and Wolverine ® . The Company’s products are marketed worldwide through owned operations, through licensing and distribution arrangements with third parties, and joint ventures. The Company also operates retail stores and eCommerce sites to market both its own brands and branded footwear and apparel from other manufacturers, as well as a leathers division that markets Wolverine Performance Leathers™ . Basis of Presentation The accompanying unaudited consolidated condensed financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and with the instructions to the Quarterly Report on Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for a complete presentation of the financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for fair presentation have been included in the accompanying financial statements. For further information, refer to the consolidated financial statements and footnotes included in the Company’s 2019 Form 10-K. The COVID-19 pandemic, the duration and severity of which is subject to uncertainty, has had and continues to have, a significant impact on the Company's business. Management's estimates and assumptions used in the preparation of the Company’s consolidated financial statements in accordance with U.S. GAAP contemplated both current and expected potential future impacts of COVID-19 on the Company’s business based on available information. Actual results may differ materially from management’s estimates. Fiscal Year The Company’s fiscal year is the 52 or 53-week period that ends on the Saturday nearest to December 31. Fiscal year 2020 has 53 weeks and fiscal year 2019 contained 52 weeks. The Company reports its quarterly results of operations on the basis of 13-week quarters for each of the first three fiscal quarters and a 13 or 14-week period for the fiscal fourth quarter. References to particular years or quarters refer to the Company’s fiscal years ended on the Saturday nearest to December 31 or the fiscal quarters within those years. Seasonality Prior to the COVID-19 pandemic, the Company’s business was subject to seasonal influences that could cause significant differences in revenue, earnings and cash flows from quarter to quarter. The COVID-19 pandemic has resulted in changes in consumer behavior and preferences in fiscal 2020 that have negatively impacted our fiscal 2020 results. The Company expects the seasonal cadence that the Company has experienced historically may continue to be affected as a result of these changes in consumer behavior and preferences.

New Accounting Standards (Notes

New Accounting Standards (Notes)	9 Months Ended
	Sep. 26, 2020
Accounting Standards Update and Change in Accounting Principle [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	NEW ACCOUNTING STANDARDS The Financial Accounting Standards Board (“FASB”) issued the following Accounting Standards Updates (“ASU”) that the Company adopted during fiscal year 2020. The following is a summary of the effect of adoption of this new standard. Standard Description Effect on the Financial Statements or Other Significant Matters ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments Seeks to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date by replacing the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to determine credit loss estimates. The Company adopted ASU 2016-13 at the beginning of the first quarter on a prospective basis. The Company adjusted its business policies and processes relating to the measurement of allowances for credit losses to consider reasonable and supportable information to determine expected credit losses on accounts receivable. The adoption of the ASU did not have a material effect on the consolidated financial statements. ASU 2017-04, Intangibles Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment Eliminates step two of the goodwill impairment test under legacy US GAAP. Annual and interim goodwill impairment tests are performed by comparing the fair value of a reporting unit with its carrying amount and the amount by which the carrying amount exceeds the reporting unit’s fair value will be recognized as an impairment charge. The Company adopted the ASU at the beginning of the first quarter on a prospective basis. The adoption of the ASU did not have a significant impact on the Company’s financial statements and all prospective impairment tests will be completed under this standard.

Earnings Per Share (Notes)

Earnings Per Share (Notes)	9 Months Ended
	Sep. 26, 2020
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE The Company calculates earnings per share in accordance with FASB Accounting Standards Codification (“ASC”) Topic 260, Earnings Per Share (“ASC 260”). ASC 260 addresses whether instruments granted in share-based payment transactions are participating securities prior to vesting, and, therefore, need to be included in the earnings allocation in computing earnings per share under the two-class method. Under the guidance in ASC 260, the Company’s unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents, whether paid or unpaid, are participating securities and must be included in the computation of earnings per share pursuant to the two-class method. The following table sets forth the computation of basic and diluted earnings per share. Quarter Ended Year-To-Date Ended (In millions, except per share data) September 26, September 28, September 26, September 28, Numerator: Net earnings attributable to Wolverine World Wide, Inc. $ 22.4 $ 48.7 $ 33.8 $ 129.4 Adjustment for earnings allocated to non-vested restricted common stock (0.6) (1.0) (0.8) (2.6) Net earnings used in calculating basic earnings per share 21.8 47.7 33.0 126.8 Adjustment for earnings reallocated from non-vested restricted common stock — — — 0.1 Net earnings used in calculating basic and diluted earnings per share $ 21.8 $ 47.7 $ 33.0 $ 126.9 Denominator: Weighted average shares outstanding 81.9 83.5 81.7 87.3 Adjustment for non-vested restricted common stock (0.9) (0.5) (0.7) (0.7) Shares used in calculating basic earnings per share 81.0 83.0 81.0 86.6 Effect of dilutive stock options 0.5 0.9 0.5 1.4 Shares used in calculating diluted earnings per share 81.5 83.9 81.5 88.0 Net earnings per share: Basic $ 0.27 $ 0.57 $ 0.41 $ 1.46 Diluted $ 0.27 $ 0.57 $ 0.41 $ 1.44 For the quarter and year-to-date ended September 26, 2020, 1,185,864 and 1,184,559 outstanding stock options, respectively, have not been included in the denominator for the computation of diluted earnings per share because they were anti-dilutive. For the quarter and year-to-date ended September 28, 2019, 1,228,157 and 131,004 outstanding stock options, respectively, have not been included in the denominator for the computation of diluted earnings per share because they were anti-dilutive.

Goodwill and Indefinite-Lived I

Goodwill and Indefinite-Lived Intangibles (Notes)	9 Months Ended
	Sep. 26, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Indefinite-Lived Intangibles	GOODWILL AND INDEFINITE-LIVED INTANGIBLES The changes in the carrying amount of goodwill are as follows: Year-To-Date Ended (In millions) September 26, September 28, Goodwill balance at beginning of the year $ 438.9 $ 424.4 Acquisition of a business (see Note 17) — 12.3 Foreign currency translation effects (1.1) 0.3 Goodwill balance at end of the quarter $ 437.8 $ 437.0 The Company’s indefinite-lived intangible assets, which comprise trade names and trademarks, totaled $604.5 million as of September 26, 2020, December 28, 2019 and September 28, 2019. The carrying value of the Company’s Sperry ® trade name was $518.2 million as of September 26, 2020. Based on the interim impairment assessment as of September 26, 2020, it was determined there were no triggering events of impairment for goodwill and indefinite-lived intangible assets. If the operating results for Sperry ® were to decline in future periods compared to current projections, or if further deterioration of macroeconomic conditions due to the COVID-19 pandemic adversely affect the value of the Company’s Sperry ® trade name and goodwill balances, the Company may need to record a non-cash impairment charge. The Company continues to monitor the effects of the COVID-19 pandemic, and actions taken by governments, businesses and individuals in response to the pandemic, on the global economy to assess the outlook for demand for our products and the impact on our business and financial performance.

Accounts Receivable (Notes)

Accounts Receivable (Notes)	9 Months Ended
	Sep. 26, 2020
Accounts Receivables [Abstract]
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	ACCOUNTS RECEIVABLE The Company has an agreement with a financial institution to sell selected trade accounts receivable on a recurring, nonrecourse basis that expires in the fourth quarter of fiscal 2020, subject to renewal. Under the agreement, up to $75.0 million of accounts receivable may be sold to the financial institution and remain outstanding at any point in time. After the sale, the Company does not retain any interests in the accounts receivable and removes them from its consolidated condensed balance sheet, but continues to service and collect the outstanding accounts receivable on behalf of the financial institution. The Company recognizes a servicing asset or servicing liability, initially measured at fair value, each time it undertakes an obligation to service the accounts receivable under the agreement. For receivables sold under the agreement, 90% of the stated amount is paid in cash to the Company at the time of sale, with the remainder paid to the Company at the completion of the collection process. The following is a summary of the stated amount of accounts receivable that was sold as well as fees charged by the financial institution. Quarter Ended Year-To-Date Ended (In millions) September 26, 2020 Accounts receivable sold $ — $ 14.1 Fees charged — 0.1

Revenue From Contracts With Cus

Revenue From Contracts With Customers (Notes)	9 Months Ended
	Sep. 26, 2020
Revenue From Contracts With Customers [Abstract]
Revenue from Contract with Customer [Text Block]	REVENUE FROM CONTRACTS WITH CUSTOMERS Revenue Recognition and Performance Obligations The Company recognizes revenue in accordance with FASB ASC Topic 606, Revenue from Contracts with Customers . Revenue is recognized upon the transfer of promised goods or services to customers, in an amount that reflects the expected consideration to be received in exchange for those goods or services. The Company identifies the performance obligation in the contract, determines the transaction price, allocates the transaction price to the performance obligations and recognizes revenue upon completion of the performance obligation. Revenue is recognized net of variable consideration and any taxes collected from customers, which are subsequently remitted to governmental authorities. The Company has agreements to license symbolic intellectual property with minimum guarantees or fixed consideration. The Company is due $25.9 million of remaining fixed transaction price under its license agreements as of September 26, 2020, which it expects to recognize per the terms of its contracts over the course of time through December 2024. The Company has elected to omit the remaining variable consideration under its license agreements given the Company recognizes revenue equal to what it has the right to invoice and that amount corresponds directly with the value to the customer of the Company’s performance to date. The Company provides disaggregated revenue by sales channel, including the wholesale and consumer-direct sales channels, reconciled to the Company’s reportable segments. The wholesale channel includes royalty revenues due to the similarity in the Company’s oversight and management, customer base, the performance obligation (footwear and apparel goods) and point in time completion of the performance obligation. Quarter Ended September 26, 2020 Quarter Ended September 28, 2019 (In millions) Wholesale Consumer-Direct Total Wholesale Consumer-Direct Total Wolverine Michigan Group $ 227.6 $ 59.7 $ 287.3 $ 279.5 $ 39.3 $ 318.8 Wolverine Boston Group 150.7 43.1 193.8 203.5 37.8 241.3 Other 10.6 1.4 12.0 12.9 1.3 14.2 Total $ 388.9 $ 104.2 $ 493.1 $ 495.9 $ 78.4 $ 574.3 Year-To-Date Ended September 26, 2020 Year-To-Date Ended September 28, 2019 (In millions) Wholesale Consumer-Direct Total Wholesale Consumer-Direct Total Wolverine Michigan Group $ 590.9 $ 161.6 $ 752.5 $ 829.1 $ 110.6 $ 939.7 Wolverine Boston Group 374.3 124.1 498.4 570.7 106.1 676.8 Other 28.1 2.5 30.6 46.3 3.5 49.8 Total $ 993.3 $ 288.2 $ 1,281.5 $ 1,446.1 $ 220.2 $ 1,666.3 Reserves for Variable Consideration Revenue is recorded at the net sales price (“transaction price”), which includes estimates of variable consideration for which reserves are established. Components of variable consideration include trade discounts and allowances, product returns, customer markdowns, customer rebates and other sales incentives relating to the sale of the Company’s products. These reserves, as detailed below, are based on the amounts earned, or to be claimed on the related sales. These estimates take into consideration a range of possible outcomes, which are probability-weighted in accordance with the expected value method for relevant factors such as current contractual and statutory requirements, specific known market events and trends, industry data and forecasted customer buying and payment patterns. Overall, these reserves reflect the Company’s best estimates of the amount of consideration to which it is entitled based on the terms of the respective underlying contracts. Revenue recognized during the fiscal periods presented related to the Company’s contract liabilities was nominal. The Company’s contract balances are as follows: (In millions) September 26, December 28, September 28, Product returns reserve $ 9.3 $ 11.4 $ 9.5 Customer markdowns reserve 4.0 4.4 3.6 Other sales incentives reserve 4.3 2.3 1.9 Customer rebates liability 13.9 12.0 10.8 Customer advances liability 2.0 7.2 5.4 The amount of variable consideration included in the transaction price may be constrained and is included in the net sales price only to the extent that it is probable that a significant reversal in the amount of the cumulative revenue recognized under the contract will not occur in a future period. Actual amounts of consideration ultimately received may differ from initial estimates. If actual results in the future vary from initial estimates, the Company subsequently adjusts these estimates, which affects net revenue and earnings in the period such variances become known.

Debt (Notes)

Debt (Notes)	9 Months Ended
	Sep. 26, 2020
Debt Disclosure [Abstract]
Debt	DEBT Total debt consists of the following obligations: (In millions) September 26, December 28, September 28, Term Loan A, due December 6, 2023 $ 185.0 $ 192.5 $ 195.0 Incremental Term Loan, due May 4, 2021 150.0 — — Senior Notes, 5.000% interest, due September 1, 2026 250.0 250.0 250.0 Senior Notes, 6.375% interest, due May 15, 2025 300.0 — — Borrowings under revolving credit agreements — 360.0 493.3 Unamortized deferred financing costs (8.4) (4.1) (4.3) Total debt $ 876.6 $ 798.4 $ 934.0 On May 5, 2020, the Company entered into a Second Amendment (the “Amendment”) which amended its senior credit facility that was most recently amended and restated as of December 6, 2018 (as so amended by the Amendment, the “Amended Senior Credit Facility”). In connection with the Amendment, the Company borrowed $171.0 million in aggregate principal amount of incremental term loan (the “Incremental Term Loan”). The Incremental Term Loan will mature on May 4, 2021 and bears interest at a rate equal either to (i) the applicable base rate plus 1.250% or (ii) LIBOR plus 2.250%. During the third quarter of 2020, the Company repaid $21.0 million in principal of the Incremental Term Loan. The Amended Senior Credit Facility also included a $200.0 million term loan facility (“Term Loan A”) and an $800.0 million Revolving Credit Facility, both with maturity dates of December 6, 2023, that remain unchanged as a result of the Amendment. The Amended Senior Credit Facility’s debt capacity is limited to an aggregate debt amount (including outstanding term loan principal and revolver commitment amounts in addition to permitted incremental debt) not to exceed $1,750.0 million, unless certain specified conditions set forth in the Amended Senior Credit Facility are met. Term Loan A requires quarterly principal payments with a balloon payment due on December 6, 2023. The scheduled principal payments due under Term Loan A and the Incremental Term Loan over the next 12 months total $162.5 million as of September 26, 2020 and are recorded as current maturities of long-term debt on the consolidated condensed balance sheets. The Revolving Credit Facility allows the Company to borrow up to an aggregate amount of $800.0 million, which includes a $200.0 million foreign currency subfacility under which borrowings may be made, subject to certain conditions, in Canadian dollars, British pounds, euros, Hong Kong dollars, Swedish kronor, Swiss francs and such additional currencies as are determined in accordance with the Amended Senior Credit Facility. The Revolving Credit Facility also includes a $50.0 million swingline subfacility and a $50.0 million letter of credit subfacility. The Company had outstanding letters of credit under the Revolving Credit Facility of $6.0 million, $5.7 million and $3.9 million as of September 26, 2020, December 28, 2019 and September 28, 2019, respectively. These outstanding letters of credit reduce the borrowing capacity under the Revolving Credit Facility. The interest rates applicable to amounts outstanding under Term Loan A and to U.S. dollar denominated amounts outstanding under the Revolving Credit Facility will be, at the Company’s option, either (1) the Alternate Base Rate plus an Applicable Margin as determined by the Company’s Consolidated Leverage Ratio, within a range of 0.125% to 1.000%, or (2) the Eurocurrency Rate plus an Applicable Margin as determined by the Company’s Consolidated Leverage Ratio, within a range of 1.125% to 2.000% (all capitalized terms used in this sentence are as defined in the Amended Senior Credit Facility). The Company has an interest rate swap arrangement that reduces the Company’s exposure to fluctuations in interest rates on its variable rate debt. At September 26, 2020, Term Loan A and the Incremental Term Loan had a weighted-average interest rate of 3.78%. The obligations of the Company pursuant to the Amended Senior Credit Facility are guaranteed by substantially all of the Company’s material domestic subsidiaries and secured by substantially all of the personal and real property of the Company and its material domestic subsidiaries, subject to certain exceptions. The Amended Senior Credit Facility also contains certain affirmative and negative covenants, including covenants that limit the ability of the Company and its Restricted Subsidiaries to, among other things: incur or guarantee indebtedness; incur liens; pay dividends or repurchase stock; enter into transactions with affiliates; consummate asset sales, acquisitions or mergers; prepay certain other indebtedness; or make investments, as well as covenants restricting the activities of certain foreign subsidiaries of the Company that hold intellectual property related assets. Further, the Amended Senior Credit Facility requires compliance with the following financial covenants: a maximum Consolidated Leverage Ratio and a minimum Consolidated Interest Coverage Ratio (all capitalized terms used in this paragraph are as defined in the Amended Senior Credit Facility). As of September 26, 2020, the Company was in compliance with all covenants and performance ratios under the Amended Senior Credit Facility. On May 11, 2020 the Company issued $300.0 million aggregate principal amount of 6.375% Senior Notes due on May 15, 2025. Related interest payments are due semi-annually beginning on November 15, 2020. These senior notes are guaranteed by substantially all of the Company’s domestic subsidiaries. The Company has $250.0 million of senior notes outstanding that are due on September 1, 2026. These senior notes bear interest at 5.00% with the related interest payments due semi-annually and are guaranteed by substantially all of the Company’s domestic subsidiaries. The Company has a foreign revolving credit facility with aggregate available borrowings of $4.0 million that are uncommitted and, therefore, each borrowing against the facility is subject to approval by the lender. Borrowings against this facility were $0.0 million, $0.0 million and $0.3 million as of September 26, 2020, December 28, 2019 and September 28, 2019, respectively. The Company included in interest expense the amortization of deferred financing costs of $0.9 million and $2.0 million for the quarter and year-to-date ended September 26, 2020, respectively. The Company included in interest expense the amortization of deferred financing costs of $0.4 million and $1.2 million for the quarter and year-to-date ended September 28, 2019, respectively.

Leases (Notes)

Leases (Notes)	9 Months Ended
	Sep. 26, 2020
Leases [Abstract]
Lessee, Operating Leases [Text Block]	LEASES The Company’s leases consist primarily of corporate offices, retail stores, distribution centers, showrooms, vehicles and office equipment. The Company leases assets in the normal course of business to meet its current and future needs while providing flexibility to its operations. The Company enters into contracts with third parties to lease specifically identified assets. Most of the Company’s leases have contractually specified renewal periods. Most retail store leases have early termination clauses that the Company can elect if stipulated sales amounts are not achieved. The Company determines the lease term for each lease based on the terms of each contract and factors in renewal and early termination options if such options are reasonably certain to be exercised. In response to the COVID-19 pandemic and the effect the pandemic had on the Company’s leased properties, the Company has been actively seeking rent relief from its landlords. The Company considered the FASB staff guidance issued in April 2020 in relation to accounting for lease concessions made in connection with the effects of the COVID-19 pandemic and elected to apply the temporary practical expedient to account for rent deferrals and abatements as though the enforceable rights and obligations existed in each contract. Depending on the timing of the future payments, amounts deferred and payable in future periods have been included in “Other accrued liabilities” and “Other liabilities” on the Company’s condensed consolidated balance sheets. The Company continued to recognize lease expense on a straight-line basis for its leases over the related lease terms. The following is a summary of the Company’s lease cost. Quarter Ended Year-To-Date Ended (In millions) September 26, September 28, September 26, September 28, Operating lease cost $ 7.9 $ 8.1 $ 24.2 $ 24.3 Variable lease cost 3.0 3.6 9.1 10.9 Short-term lease cost 0.3 0.3 0.8 0.9 Sublease income (1.2) (1.0) (3.5) (2.9) Total lease cost $ 10.0 $ 11.0 $ 30.6 $ 33.2 Future undiscounted cash flows for operating leases for the fiscal periods subsequent to September 26, 2020 are as follows: (In millions) Operating Leases Remainder of 2020 $ 10.6 2021 31.3 2022 28.4 2023 21.2 2024 18.3 Thereafter 107.8 Total future payments 217.6 Less: imputed interest 48.0 Recognized lease liability $ 169.6

Financial Instruments and Risk

Financial Instruments and Risk Management (Notes)	9 Months Ended
	Sep. 26, 2020
Investments, All Other Investments [Abstract]
Financial Instruments and Risk Management	DERIVATIVE FINANCIAL INSTRUMENTS The Company follows FASB ASC Topic 815, Derivatives and Hedging ("ASC 815"), which requires that all derivative instruments be recorded on the consolidated condensed balance sheets at fair value by establishing criteria for designation and effectiveness of hedging relationships. The Company does not hold or issue financial instruments for trading purposes. The Company utilizes foreign currency forward exchange contracts designated as cash flow hedges to manage the volatility associated primarily with U.S. dollar inventory purchases made by non-U.S. wholesale operations in the normal course of business. These foreign currency forward exchange hedge contracts extended out to a maximum of 545 days as of September 26, 2020, December 28, 2019 and September 28, 2019. If, in the future, the foreign exchange contracts are determined not to be highly effective or are terminated before their contractual termination dates, the Company would remove the hedge designation from those contracts and reclassify into earnings the unrealized gains or losses that would otherwise be included in accumulated other comprehensive income (loss) within stockholders’ equity. During fiscal 2020, the Company reclassified $1.3 million to other income for foreign currency contracts that were no longer deemed highly effective. The Company also utilizes foreign currency contracts that are not designated as hedging instruments to manage foreign currency transaction exposure. Foreign currency derivatives not designated as hedging instruments are offset by foreign exchange gains or losses resulting from the underlying exposures of foreign currency denominated assets and liabilities. The Company has an interest rate swap arrangement, which unless otherwise terminated, will mature on December 6, 2023. This agreement, which exchanges floating rate for fixed rate interest payments over the life of the agreement without the exchange of the underlying notional amounts, has been designated as a cash flow hedge of the interest payments associated with the underlying debt. The notional amounts of the interest rate swap arrangement is used to measure interest to be paid or received and does not represent the amount of exposure to credit loss. The differential paid or received on the interest rate swap arrangement is recognized as interest expense. In accordance with ASC 815, the Company has formally documented the relationship between the interest rate swap and the variable rate borrowing, as well as its risk management objective and strategy for undertaking the hedge transaction. This process included linking the derivative to the specific liability or asset on the balance sheet. The Company also assessed at the inception of the hedge, and continues to assess on an ongoing basis, whether the derivative used in the hedging transaction is highly effective in offsetting changes in the cash flows of the hedged item. The Company has a cross currency swap to minimize the impact of exchange rate fluctuations. The hedging instrument, which, unless otherwise terminated, will mature on September 1, 2021, has been designated as a hedge of a net investment in a foreign operation. The Company pays 2.75% on the euro-denominated notional amount and receive 5.00% on the U.S. dollar notional amount, with an exchange of principal at maturity. Changes in fair value related to movements in the foreign currency exchange spot rate are recorded in accumulated other comprehensive income, offsetting the currency translation adjustment related to the underlying net investment that is also recorded in accumulated other comprehensive income. All other changes in fair value are recorded in interest expense. In accordance with ASC 815, the Company has formally documented the relationship between the cross-currency swap and the Company’s investment in its euro-denominated subsidiary, as well as its risk management objective and strategy for undertaking the hedge transaction. This process included linking the derivative to its net investment on the balance sheet. The Company also assessed at the hedge’s inception, and continues to assess on an ongoing basis, whether the derivative used in the hedging transaction is highly effective in offsetting changes in expected cash flows of the hedged item. The notional amounts of the Company’s derivative instruments are as follows: (Dollars in millions) September 26, December 28, September 28, Foreign exchange contracts: Hedge contracts $ 188.3 $ 246.3 $ 237.7 Non-hedge contracts — 7.3 — Interest rate swap 293.9 355.8 366.2 Cross currency swap 79.8 79.8 79.8 The recorded fair values of the Company’s derivative instruments are as follows: (In millions) September 26, December 28, September 28, Financial assets: Foreign exchange contracts - hedge $ 1.3 $ 2.3 $ 6.3 Financial liabilities: Foreign exchange contracts - hedge $ (0.4) $ (1.8) $ (0.2) Interest rate swap (8.6) (1.8) (3.0) Cross currency swap (6.2) (3.0) (2.1)

Stock-Based Compensation (Notes

Stock-Based Compensation (Notes)	9 Months Ended
	Sep. 26, 2020
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	STOCK-BASED COMPENSATION The Company recognized compensation expense of $11.3 million and $21.5 million, and related income tax benefits of $2.2 million and $4.2 million, for grants under its stock-based compensation plans for the quarter and year-to-date ended September 26, 2020, respectively. The Company recognized compensation expense of $7.1 million and $17.3 million, and related income tax benefits of $1.5 million and $3.5 million, for grants under its stock-based compensation plans for the quarter and year-to-date ended September 28, 2019, respectively. The Company grants restricted stock or units (“restricted awards”), performance-based restricted stock or units (“performance awards”) and stock options under its stock-based compensation plans. During the year-to-date ended September 26, 2020, the Company issued 1,340,179 restricted awards at a weighted average grant date fair value of $22.29 per award. During the year-to-date ended September 28, 2019, the Company issued 547,169 restricted awards at a weighted average grant date fair value of $34.80 per award. During the year-to-date ended September 26, 2020, the Company issued 346,584 performance awards at a weighted average grant date fair value of $35.02 per award. During the year-to-date ended September 28, 2019, the Company issued 344,433 performance awards at a weighted average grant date fair value of $37.33 per award.

Retirement Plans (Notes)

Retirement Plans (Notes)	9 Months Ended
	Sep. 26, 2020
Retirement Benefits [Abstract]
Retirement Plans	RETIREMENT PLANS The following is a summary of net pension and Supplemental Executive Retirement Plan (“SERP”) expense recognized by the Company. Quarter Ended Year-To-Date Ended (In millions) September 26, September 28, September 26, September 28, Service cost pertaining to benefits earned during the period $ 1.6 $ 1.3 $ 4.8 $ 4.1 Interest cost on projected benefit obligations 3.6 3.8 10.7 11.4 Expected return on pension assets (4.7) (4.4) (14.0) (13.3) Net amortization loss 1.6 0.7 4.9 2.0 Net pension expense $ 2.1 $ 1.4 $ 6.4 $ 4.2

Income Taxes (Notes)

Income Taxes (Notes)	9 Months Ended
	Sep. 26, 2020
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXESThe Company maintains management and operational activities in overseas subsidiaries, and its foreign earnings are taxed at rates that are different than the U.S. federal statutory income tax rate. A significant amount of the Company’s earnings are generated by its Canadian, European and Asian subsidiaries and, to a lesser extent, in jurisdictions that are not subject to income tax. The Company intends to permanently reinvest all non-cash undistributed earnings outside of the U.S. and has, therefore not established a deferred tax liability on that amount of foreign unremitted earnings. However, if these non-cash undistributed earnings were repatriated, the Company would be required to accrue and pay applicable U.S. taxes and withholding taxes payable to various countries. It is not practicable to estimate the amount of the deferred tax liability associated with these non-cash unremitted earnings due to the complexity of the hypothetical calculation. The Company’s effective tax rates for the quarter and year-to-date ended September 26, 2020 were 28.5% and 15.5%, respectively. The Company’s effective tax rates for the quarter and year-to-date ended September 28, 2019 were 20.3% and 17.9%, respectively. The increase in the effective rate for the current quarterly period reflects a negative impact from current period discrete items, as well as a shift in income between tax jurisdictions with differing tax rates. The decrease in the current year-to-date effective tax rate is driven by the positive impact of discrete items partially offset by the negative impact of a shift in income between jurisdictions with differing tax rates. The Company is subject to periodic audits by U.S. federal, state, local and non-U.S. tax authorities. Currently, the Company is undergoing routine periodic audits in both U.S. federal, state, local and non-U.S. tax jurisdictions. It is reasonably possible that the amounts of unrecognized tax benefits could change in the next 12 months as a result of the audits; however, any payment of tax is not expected to be significant to the consolidated condensed financial statements. The Company is no longer subject to U.S. federal, state and local or non-U.S. income tax examinations by tax authorities for years before 2015 in the majority of tax jurisdictions.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss) (Notes)	9 Months Ended
	Sep. 26, 2020
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Accumulated other comprehensive income (loss) represents net earnings and any revenue, expenses, gains and losses that, under U.S. GAAP, are excluded from net earnings and recognized directly as a component of stockholders’ equity. The change in accumulated other comprehensive income (loss) during the quarters ended September 26, 2020 and September 28, 2019 is as follows: (In millions) Foreign Derivatives Pension Total Balance at June 29, 2019 $ (48.0) $ (2.8) $ (35.2) $ (86.0) Other comprehensive income (loss) before reclassifications (1) (5.6) 5.5 — (0.1) Amounts reclassified from accumulated other comprehensive income (loss) — (4.2) (2) 0.7 (3) (3.5) Income tax expense (benefit) — 1.1 (0.1) 1.0 Net reclassifications — (3.1) 0.6 (2.5) Net current-period other comprehensive income (loss) (1) (5.6) 2.4 0.6 (2.6) Balance at September 28, 2019 $ (53.6) $ (0.4) $ (34.6) $ (88.6) Balance at June 27, 2020 $ (55.9) $ (9.5) $ (46.1) $ (111.5) Other comprehensive income (loss) before reclassifications (1) 6.8 (5.5) — 1.3 Amounts reclassified from accumulated other comprehensive income (loss) — 0.5 (2) 1.6 (3) 2.1 Income tax expense (benefit) — 0.2 (0.3) (0.1) Net reclassifications — 0.7 1.3 2.0 Net current-period other comprehensive income (loss) (1) 6.8 (4.8) 1.3 3.3 Balance at September 26, 2020 $ (49.1) $ (14.3) $ (44.8) $ (108.2) (1) Other comprehensive income (loss) is reported net of taxes and noncontrolling interest. (2) Amounts related to foreign currency derivatives are included in cost of goods sold. Amounts related to foreign currency derivatives that are no longer deemed to be highly effective are included in other income. Amounts related to the interest rate swap and the cross-currency swap are included in interest expense. (3) Amounts reclassified are included in the computation of net pension expense. The change in accumulated other comprehensive income (loss) during the year-to-dates ended September 26, 2020 and September 28, 2019 is as follows: (In millions) Foreign Derivatives Pension Total Balance at December 29, 2018 $ (53.0) $ 0.9 $ (36.2) $ (88.3) Other comprehensive income (loss) before reclassifications (1) (0.6) 4.7 — 4.1 Amounts reclassified from accumulated other comprehensive income (loss) — (7.7) (2) 2.0 (3) (5.7) Income tax expense (benefit) — 1.7 (0.4) 1.3 Net reclassifications — (6.0) 1.6 (4.4) Net current-period other comprehensive income (loss) (1) (0.6) (1.3) 1.6 (0.3) Balance at September 28, 2019 $ (53.6) $ (0.4) $ (34.6) $ (88.6) Balance at December 28, 2019 $ (47.6) $ (5.8) $ (48.7) $ (102.1) Other comprehensive income (loss) before reclassifications (1) (1.5) (6.2) — (7.7) Amounts reclassified from accumulated other comprehensive income (loss) — (3.1) (2) 4.9 (3) 1.8 Income tax expense (benefit) — 0.8 (1.0) (0.2) Net reclassifications — (2.3) 3.9 1.6 Net current-period other comprehensive income (loss) (1) (1.5) (8.5) 3.9 (6.1) Balance at September 26, 2020 $ (49.1) $ (14.3) $ (44.8) $ (108.2) (1) Other comprehensive income (loss) is reported net of taxes and noncontrolling interest. (2) Amounts related to foreign currency derivatives are included in cost of goods sold. Amounts related to foreign currency derivatives that are no longer deemed to be highly effective are included in other income. Amounts related to the interest rate swap and the cross-currency swap are included in interest expense. (3) Amounts reclassified are included in the computation of net pension expense.

Fair Value Measurements (Notes)

Fair Value Measurements (Notes)	9 Months Ended
	Sep. 26, 2020
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	FAIR VALUE MEASUREMENTS The Company follows FASB ASC Topic 820, Fair Value Measurements and Disclosures (“ASC 820”), which provides a consistent definition of fair value, focuses on exit price, prioritizes the use of market-based inputs over entity-specific inputs for measuring fair value and establishes a three-tier hierarchy for fair value measurements. ASC 820 requires fair value measurements to be classified and disclosed in one of the following three categories: Level 1: Fair value is measured using quoted prices (unadjusted) in active markets for identical assets and liabilities. Level 2: Fair value is measured using either direct or indirect inputs, other than quoted prices included within Level 1, which are observable for similar assets or liabilities. Level 3: Fair value is measured using valuation techniques in which one or more significant inputs are unobservable. Recurring Fair Value Measurements The following table sets forth financial assets and liabilities measured at fair value in the consolidated condensed balance sheets and the respective pricing levels to which the fair value measurements are classified within the fair value hierarchy. Fair Value Measurements Quoted Prices With Other Observable Inputs (Level 2) (In millions) September 26, December 28, September 28, Financial assets: Derivatives $ 1.3 $ 2.3 $ 6.3 Financial liabilities: Derivatives $ (15.2) $ (6.6) $ (5.3) The fair value of foreign currency forward exchange contracts represents the estimated receipts or payments necessary to terminate the contracts. The interest rate swap is valued based on the current forward rates of the future cash flows. The fair value of the cross-currency swap is determined using the current forward rates and changes in the spot rate. Fair Value Disclosures The Company’s financial instruments that are not recorded at fair value consist of cash and cash equivalents, accounts and notes receivable, accounts payable, borrowings under revolving credit agreements and other short-term and long-term debt. The carrying amount of these financial instruments is historical cost, which approximates fair value, except for the debt. The carrying value and the fair value of the Company’s debt are as follows: (In millions) September 26, December 28, September 28, Carrying value $ 876.6 $ 798.4 $ 934.0 Fair value 921.1 817.6 952.8

Litigation and Contingencies (N

Litigation and Contingencies (Notes)	9 Months Ended
	Sep. 26, 2020
Commitments and Contingencies Disclosure [Abstract]
Litigation and Contingencies	LITIGATION AND CONTINGENCIES Litigation The Company operated a leather tannery in Rockford, Michigan from the early 1900s through 2009 (the “Tannery”). The Company also owns a parcel on House Street in Plainfield Township that the Company used for the disposal of Tannery byproducts until about 1970 (the "House Street" site). Beginning in the late 1950s, the Company used 3M Company’s Scotchgard™ in its processing of certain leathers at the Tannery. Until 2002 when 3M Company changed its Scotchgard™ formula, Tannery byproducts disposed of by the Company at the House Street site and other locations may have contained PFOA and/or PFOS, two chemicals in the family of compounds known as per- and polyfluoroalkyl substances (together, “PFAS”). PFOA and PFOS help provide non-stick, stain-resistant, and water-resistant qualities, and were used for many decades in commercial products like firefighting foams and metal plating, and in common consumer items like food wrappers, microwave popcorn bags, pizza boxes, Teflon™, carpets and Scotchgard™. In May 2016, the Environmental Protection Agency (“EPA”) announced a lifetime health advisory level of 70 parts per trillion (“ppt”) combined for PFOA and PFOS. In January 2018, the Michigan Department of Environmental Quality (“MDEQ”, now known as the Michigan Department of Environment, Great Lakes, and Energy (“EGLE”)) enacted a drinking water criterion of 70 ppt combined for PFOA and PFOS, which set an official state standard for acceptable concentrations of these contaminants in groundwater used for drinking water purposes. On August 3, 2020 Michigan changed the standards for PFOA and PFOS in drinking water to 8 and 16 ppt, respectively, and set standards for four other PFAS substances. Civil and Regulatory Actions of EGLE and EPA On January 10, 2018, EGLE filed a civil action against the Company in the U.S. District Court for the Western District of Michigan under the federal Resource Conservation and Recovery Act of 1976 (“RCRA”) and Parts 201 and 31 of the Michigan Natural Resources and Environmental Protection Act (“NREPA”) alleging that the Company’s past and present handling, storage, treatment, transportation and/or disposal of solid waste at the Company’s properties has contributed to the disposal of solid wastes that was done in a way that resulted in releases of PFAS at levels that resulted in detections exceeding applicable Michigan cleanup criteria for PFOA and PFOS (the "EGLE Action"). Plainfield and Algoma Townships intervened in the EGLE Action alleging claims under RCRA, NREPA, the Comprehensive Environmental Response, Compensation, and Liability Act (“CERCLA”) and common law nuisance. On December 19, 2018, the Company filed a third-party complaint against 3M Company seeking, among other things, recovery of the Company’s remediation and other costs incurred in defense of the EGLE Action ("the 3M Action"). On June 20, 2019, the 3M Company filed a counterclaim against the Company in response to the 3M Action, seeking, among other things, contractual and common law indemnity and contribution under CERCLA and Part 201 of NREPA. On February 3, 2020, the parties entered into a consent decree resolving the EGLE Action, which was approved by U.S. District Judge Janet T. Neff on February 19, 2020 (the “Consent Decree”). On February 20, 2020, the Company and the 3M Company entered into a settlement agreement resolving the 3M Action, under which 3M Company paid the Company a lump sum amount of $55.0 million during the first quarter of 2020. Under the Consent Decree, the Company will pay to extend Plainfield Township’s municipal water system to more than 1,000 properties in Plainfield and Algoma Townships, subject to an aggregate cap of $69.5 million. The Consent Decree also obligates the Company to continue maintaining water filters for certain homeowners, resample certain residential wells for PFAS, continue remediation at the Company’s Tannery property and House Street site, and conduct further investigations and monitoring to the assess the presence of PFAS in area groundwater. The Company’s activities under the Consent Decree are not materially impacted by the drinking water standards that became effective on August 3, 2020. On January 10, 2018, the EPA entered a Unilateral Administrative Order (the “Order”) under Section 106(a) of CERCLA, 42 U.S.C. § 9606(a). The effective date of the Order was February 1, 2018. The Order pertained to the Company's Tannery and House Street sites and directed the Company to conduct specified removal actions, including certain time critical removal actions subsequently identified in an April 29, 2019 letter from the EPA, to abate the actual or threatened release of hazardous substances at or from the sites. On October 28, 2019, the EPA and the Company entered into an Administrative Settlement and Order on Consent (“AOC”) that supersedes the Order and addresses the agreed-upon removal actions outlined in the Order. The Company has completed almost all of these activities related to the AOC, and will complete the remaining activities in 2020 pursuant to approved work plans. The Company discusses its reserve for remediation costs in the environmental liabilities section below. Individual and Class Action Litigation Individual lawsuits and three putative class action lawsuits have been filed against the Company that raise a variety of claims, including claims related to property, remediation, and human health effects. The three putative class action lawsuits were subsequently refiled in the U.S. District Court for the Western District of Michigan as a single consolidated putative class action lawsuit. 3M Company has been named as a co-defendant in the individual lawsuits and consolidated putative class action lawsuit. In addition, the current owner of a former landfill and gravel mining operation sued the Company seeking damages and cost recovery for property damage allegedly caused by the Company’s disposal of tannery waste containing PFAS (this suit collectively with the individual lawsuits and putative class action, the “Litigation Matters”). Assessing potential liability with respect to the Litigation Matters at this time is difficult. The Litigation Matters are in various stages of discovery and related motions. In addition, there is minimal direct and relevant precedent for these types of claims related to PFAS, and the science regarding the human health effects of PFAS exposure in the environment remains inconclusive and inconsistent, thereby creating additional uncertainties. Due to these factors, combined with the complexities and uncertainties of litigation, the Company is unable to conclude that adverse verdicts resulting from the Litigation Matters are probable, and therefore no amounts are currently reserved for these claims. The Company intends to continue to vigorously defend itself against these claims. In addition, in December 2018 the Company filed a lawsuit against certain of its historic liability insurers, seeking their participation in the Company's defense and remediation efforts. The Company recognized $7.0 million in recoveries from legacy insurance policies in the first three quarters of 2020 and $1.2 million in recoveries in the third quarter of 2020. The recoveries resulted from interim payment agreements reached with the insurers and are pending final resolution of the lawsuit. Other Litigation The Company is also involved in litigation incidental to its business and is a party to legal actions and claims, including, but not limited to, those related to employment, intellectual property, and other environmental matters. Some of the legal proceedings include claims for compensatory as well as punitive damages. While the final outcome of these matters cannot be predicted with certainty, considering, among other things, the meritorious legal defenses available to the Company and reserves for liabilities that the Company has recorded, along with applicable insurance, it is management’s opinion that the outcome of these items are not expected to have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows. Environmental Liabilities The following is a summary of the activity with respect to the environmental remediation reserve established by the Company: Year-To-Date Ended (In millions) September 26, September 28, Remediation liability at beginning of the year $ 124.4 $ 22.6 Changes in estimate — — Amounts paid (27.1) (7.8) Remediation liability at the end of the quarter $ 97.3 $ 14.8 The reserve balance as of September 26, 2020 includes $23.7 million that is expected to be paid within the next twelve months and is recorded as a current obligation in other accrued liabilities, with the remaining $73.6 million expected to be paid over the course of up to 25 years, recorded in other liabilities. The Company's remediation activity at the Tannery property, House Street site and other relevant disposal sites is ongoing. Although the recent Consent Decree has made near-term costs more clear, it is difficult to estimate the long-term cost of environmental compliance and remediation given the uncertainties regarding the interpretation and enforcement of applicable environmental laws and regulations, the extent of environmental contamination and the existence of alternative cleanup methods. Future developments may occur that could materially change the Company’s current cost estimates, including, but not limited to: (i) changes in the information available regarding the environmental impact of the Company’s operations and products; (ii) changes in environmental regulations, changes in permissible levels of specific compounds in drinking water sources, or changes in enforcement theories and policies, including efforts to recover natural resource damages; (iii) new and evolving analytical and remediation techniques; (iv) changes to the form of remediation; (v) success in allocating liability to other potentially responsible parties; and (vi) the financial viability of other potentially responsible parties and third-party indemnitors. For locations at which remediation activity is largely ongoing, the Company cannot estimate a possible loss or range of loss in excess of the associated established reserves for the reasons described above. The Company adjusts recorded liabilities as further information develops or circumstances change. Minimum Royalties and Advertising Commitments The Company has future minimum royalty and advertising obligations due under the terms of certain licenses held by the Company. These minimum future obligations for the fiscal periods subsequent to September 26, 2020 are as follows: (In millions) 2020 2021 2022 2023 2024 Thereafter Minimum royalties $ 0.4 $ 1.7 $ 1.8 $ — $ — $ — Minimum advertising — 3.3 3.4 3.5 3.6 — Minimum royalties are based on both fixed obligations and assumptions regarding the Consumer Price Index. Royalty obligations in excess of minimum requirements are based upon future sales levels. In accordance with these agreements, the Company incurred royalty expense of $0.5 million and $1.4 million for the quarter and year-to-date ended September 26, 2020, respectively. For the quarter and year-to-date ended September 28, 2019, the Company incurred royalty expense in accordance with these agreements of $0.6 million and $1.6 million, respectively. The terms of certain license agreements also require the Company to make advertising expenditures based on the level of sales of the licensed products. In accordance with these agreements, the Company incurred advertising expense of $0.4 million and $1.4 million for the quarter and year-to-date ended September 26, 2020, respectively. For the quarter and year-to-date ended September 28, 2019, the Company incurred advertising expense in accordance with these agreements of $0.9 million and $2.8 million, respectively.

Business Segments (Notes)

Business Segments (Notes)	9 Months Ended
	Sep. 26, 2020
Segment Reporting [Abstract]
Business Segments	BUSINESS SEGMENTS The Company’s portfolio of brands is organized into the following two operating segments, which the Company has determined to be reportable segments. • Wolverine Michigan Group , consisting of Merrell ® footwear and apparel, Cat ® footwear, Wolverine ® footwear and apparel, Chaco ® footwear, Hush Puppies ® footwear and apparel, Bates ® uniform footwear, Harley-Davidson ® footwear and Hytest ® safety footwear; and • Wolverine Boston Group , consisting of Sperry ® footwear and apparel, Saucony ® footwear and apparel, Keds ® footwear and apparel, and the Kids’ footwear business, which includes the Stride Rite ® licensed business, as well as Kids' footwear offerings from Saucony ® , Sperry ® , Keds ® , Merrell ® , Hush Puppies ® and Cat ® . The reportable segments are engaged in designing, manufacturing, sourcing, marketing, licensing and distributing branded footwear, apparel and accessories. Revenue for the reportable segments includes revenue from the sale of branded footwear, apparel and accessories to third-party customers; revenue from third-party licensees and distributors; and revenue from the Company’s consumer-direct businesses. The Company also reports “Other” and “Corporate” categories. The Other category consists of the Company’s leather marketing operations, sourcing operations that include third-party commission revenues and multi-branded consumer-direct retail stores. The Corporate category consists of unallocated corporate expenses, such as COVID-19 related costs, environmental and other related costs. The Company’s reportable segments are determined based on how the Company internally reports and evaluates financial information used to make operating decisions. The reportable segment managers all report directly to the chief operating decision maker. Company management uses various financial measures to evaluate the performance of the reportable segments. The following is a summary of certain key financial measures for each reportable segment. Quarter Ended Year-To-Date Ended (In millions) September 26, September 28, September 26, September 28, Revenue: Wolverine Michigan Group $ 287.3 $ 318.8 $ 752.5 $ 939.7 Wolverine Boston Group 193.8 241.3 498.4 676.8 Other 12.0 14.2 30.6 49.8 Total $ 493.1 $ 574.3 $ 1,281.5 $ 1,666.3 Operating profit (loss): Wolverine Michigan Group $ 52.3 $ 66.0 $ 133.8 $ 183.8 Wolverine Boston Group 33.0 46.5 60.4 115.7 Other 0.7 0.7 1.0 3.0 Corporate (43.4) (44.9) (128.2) (126.3) Total $ 42.6 $ 68.3 $ 67.0 $ 176.2 (In millions) September 26, December 28, September 28, Total assets: Wolverine Michigan Group $ 691.8 $ 773.8 $ 814.8 Wolverine Boston Group 1,322.5 1,354.8 1,404.6 Other 33.6 38.4 43.8 Corporate 453.2 313.0 205.3 Total $ 2,501.1 $ 2,480.0 $ 2,468.5 Goodwill: Wolverine Michigan Group $ 143.9 $ 144.4 $ 143.1 Wolverine Boston Group 293.9 294.5 293.9 Total $ 437.8 $ 438.9 $ 437.0

Business Combinations (Notes)

Business Combinations (Notes)	9 Months Ended
	Sep. 26, 2020
Business Combinations [Abstract]
Business Combination Disclosure	BUSINESS ACQUISITIONS On April 30, 2019, the Company acquired assets and assumed liabilities from Sportlab S.R.L. (“Sportlab”), the distributor of Saucony ® footwear in Italy. Total purchase consideration of $25.2 million includes cash paid, extinguishment of Sportlab’s accounts payable balance that was due to the Company at the time of acquisition and contingent consideration. The contingent consideration was based on sales activity from the date of the acquisition through the end of fiscal 2019 and was paid in the first quarter of fiscal 2020. The detailed amounts of each component of the purchase consideration are as follows: (In millions) Purchase Consideration Cash paid $ 15.1 Extinguishment of Sportlab’s accounts payable balance 4.6 Contingent consideration 5.5 Total purchase consideration $ 25.2 The Company accounted for the acquisition under the provisions of FASB ASC Topic 805, Business Combinations . The related assets acquired and liabilities assumed were recorded at fair value on the acquisition date. The operating results for the acquired Saucony ® distributor business are included in the Company’s consolidated results of operations beginning April 30, 2019, and are included in the Wolverine Boston Group reporting group for segment reporting purposes. The final allocation of the purchase price as of December 28, 2019 was: (In millions) Initial Valuation Accounts receivable $ 1.8 Inventories 6.2 Goodwill 12.0 Amortizable intangibles 12.9 Total assets acquired 32.9 Deferred income taxes 3.2 Other liabilities 4.5 Total liabilities assumed 7.7 Net assets acquired $ 25.2 The excess of the purchase price over the fair value of the net assets acquired, amounting to $12.0 million, was recorded as goodwill in the consolidated balance sheet and was assigned to the Wolverine Boston Group reportable segment. The goodwill that was recognized is attributable to the efficiencies to be gained by integrating operations with the Saucony ® distribution business purchased from Sportlab. Other intangible assets acquired include order backlog, valued at $1.7 million, and customer relationship assets, valued at $11.2 million, which had estimated useful lives at the acquisition date of 7 months and 14 years, respectively.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 26, 2020
Accounting Policies [Abstract]
Nature of Operations [Text Block]	Nature of Operations Wolverine World Wide, Inc. (the “Company”) is a leading designer, marketer and licensor of a broad range of quality casual footwear and apparel; performance outdoor and athletic footwear and apparel; kids’ footwear; industrial work shoes, boots and apparel; and uniform shoes and boots. The Company’s portfolio of owned and licensed brands includes: Bates ® , Cat ® , Chaco ® , Harley-Davidson ® , Hush Puppies ® , Hytest ® , Keds ® , Merrell ® , Saucony ® , Sperry ® , Stride Rite ® and Wolverine ® . The Company’s products are marketed worldwide through owned operations, through licensing and distribution arrangements with third parties, and joint ventures. The Company also operates retail stores and eCommerce sites to market both its own brands and branded footwear and apparel from other manufacturers, as well as a leathers division that markets Wolverine Performance Leathers™ .
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated condensed financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and with the instructions to the Quarterly Report on Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for a complete presentation of the financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for fair presentation have been included in the accompanying financial statements. For further information, refer to the consolidated financial statements and footnotes included in the Company’s 2019 Form 10-K. The COVID-19 pandemic, the duration and severity of which is subject to uncertainty, has had and continues to have, a significant impact on the Company's business. Management's estimates and assumptions used in the preparation of the Company’s consolidated financial statements in accordance with U.S. GAAP contemplated both current and expected potential future impacts of COVID-19 on the Company’s business based on available information. Actual results may differ materially from management’s estimates.
Fiscal Year	Fiscal YearThe Company’s fiscal year is the 52 or 53-week period that ends on the Saturday nearest to December 31. Fiscal year 2020 has 53 weeks and fiscal year 2019 contained 52 weeks. The Company reports its quarterly results of operations on the basis of 13-week quarters for each of the first three fiscal quarters and a 13 or 14-week period for the fiscal fourth quarter. References to particular years or quarters refer to the Company’s fiscal years ended on the Saturday nearest to December 31 or the fiscal quarters within those years.
Seasonality	Seasonality Prior to the COVID-19 pandemic, the Company’s business was subject to seasonal influences that could cause significant differences in revenue, earnings and cash flows from quarter to quarter. The COVID-19 pandemic has resulted in changes in consumer behavior and preferences in fiscal 2020 that have negatively impacted our fiscal 2020 results. The Company expects the seasonal cadence that the Company has experienced historically may continue to be affected as a result of these changes in consumer behavior and preferences.

Earnings Per Share (Policies)

Earnings Per Share (Policies)	9 Months Ended
	Sep. 26, 2020
Earnings Per Share [Abstract]
Earnings Per Share	The Company calculates earnings per share in accordance with FASB Accounting Standards Codification (“ASC”) Topic 260, Earnings Per Share (“ASC 260”). ASC 260 addresses whether instruments granted in share-based payment transactions are participating securities prior to vesting, and, therefore, need to be included in the earnings allocation in computing earnings per share under the two-class method. Under the guidance in ASC 260, the Company’s unvested share-based payment awards that

Leases (Policies)

Leases (Policies)	9 Months Ended
	Sep. 26, 2020
Leases [Abstract]
Lessee, Leases [Policy Text Block]	The Company’s leases consist primarily of corporate offices, retail stores, distribution centers, showrooms, vehicles and office equipment. The Company leases assets in the normal course of business to meet its current and future needs while providing flexibility to its operations. The Company enters into contracts with third parties to lease specifically identified assets. Most of the Company’s leases have contractually specified renewal periods. Most retail store leases have early termination clauses that the Company can elect if stipulated sales amounts are not achieved. The Company determines the lease term for each lease based on the terms of each contract and factors in renewal and early termination options if such options are reasonably certain to be exercised. In response to the COVID-19 pandemic and the effect the pandemic had on the Company’s leased properties, the Company has been actively seeking rent relief from its landlords. The Company considered the FASB staff guidance issued in April 2020 in relation to accounting for lease concessions made in connection with the effects of the COVID-19 pandemic and elected to apply the temporary practical expedient to account for rent deferrals and abatements as though the enforceable rights and obligations existed in each contract. Depending on the timing of the future payments, amounts deferred and payable in future periods have been included in “Other accrued liabilities” and “Other liabilities” on the Company’s condensed consolidated balance sheets. The Company continued to recognize lease expense on a straight-line basis for its leases over the related lease terms.

Fair Value Measurements (Polici

Fair Value Measurements (Policies)	9 Months Ended
	Sep. 26, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements and Disclosures	The Company follows FASB ASC Topic 820, Fair Value Measurements and Disclosures (“ASC 820”), which provides a consistent definition of fair value, focuses on exit price, prioritizes the use of market-based inputs over entity-specific inputs for measuring fair value and establishes a three-tier hierarchy for fair value measurements. ASC 820 requires fair value measurements to be classified and disclosed in one of the following three categories: Level 1: Fair value is measured using quoted prices (unadjusted) in active markets for identical assets and liabilities. Level 2: Fair value is measured using either direct or indirect inputs, other than quoted prices included within Level 1, which are observable for similar assets or liabilities. Level 3: Fair value is measured using valuation techniques in which one or more significant inputs are unobservable.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 26, 2020
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share. Quarter Ended Year-To-Date Ended (In millions, except per share data) September 26, September 28, September 26, September 28, Numerator: Net earnings attributable to Wolverine World Wide, Inc. $ 22.4 $ 48.7 $ 33.8 $ 129.4 Adjustment for earnings allocated to non-vested restricted common stock (0.6) (1.0) (0.8) (2.6) Net earnings used in calculating basic earnings per share 21.8 47.7 33.0 126.8 Adjustment for earnings reallocated from non-vested restricted common stock — — — 0.1 Net earnings used in calculating basic and diluted earnings per share $ 21.8 $ 47.7 $ 33.0 $ 126.9 Denominator: Weighted average shares outstanding 81.9 83.5 81.7 87.3 Adjustment for non-vested restricted common stock (0.9) (0.5) (0.7) (0.7) Shares used in calculating basic earnings per share 81.0 83.0 81.0 86.6 Effect of dilutive stock options 0.5 0.9 0.5 1.4 Shares used in calculating diluted earnings per share 81.5 83.9 81.5 88.0 Net earnings per share: Basic $ 0.27 $ 0.57 $ 0.41 $ 1.46 Diluted $ 0.27 $ 0.57 $ 0.41 $ 1.44

Goodwill and Indefinite-Lived_2

Goodwill and Indefinite-Lived Intangibles (Tables)	9 Months Ended
	Sep. 26, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The changes in the carrying amount of goodwill are as follows: Year-To-Date Ended (In millions) September 26, September 28, Goodwill balance at beginning of the year $ 438.9 $ 424.4 Acquisition of a business (see Note 17) — 12.3 Foreign currency translation effects (1.1) 0.3 Goodwill balance at end of the quarter $ 437.8 $ 437.0

Accounts Receivable (Tables)

Accounts Receivable (Tables)	9 Months Ended
	Sep. 26, 2020
Accounts Receivable [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	The following is a summary of the stated amount of accounts receivable that was sold as well as fees charged by the financial institution. Quarter Ended Year-To-Date Ended (In millions) September 26, 2020 Accounts receivable sold $ — $ 14.1 Fees charged — 0.1

Revenue From Contracts With C_2

Revenue From Contracts With Customers (Tables)	9 Months Ended
	Sep. 26, 2020
Revenue From Contracts With Customers [Abstract]
Disaggregation of Revenue [Table Text Block]	Quarter Ended September 26, 2020 Quarter Ended September 28, 2019 (In millions) Wholesale Consumer-Direct Total Wholesale Consumer-Direct Total Wolverine Michigan Group $ 227.6 $ 59.7 $ 287.3 $ 279.5 $ 39.3 $ 318.8 Wolverine Boston Group 150.7 43.1 193.8 203.5 37.8 241.3 Other 10.6 1.4 12.0 12.9 1.3 14.2 Total $ 388.9 $ 104.2 $ 493.1 $ 495.9 $ 78.4 $ 574.3 Year-To-Date Ended September 26, 2020 Year-To-Date Ended September 28, 2019 (In millions) Wholesale Consumer-Direct Total Wholesale Consumer-Direct Total Wolverine Michigan Group $ 590.9 $ 161.6 $ 752.5 $ 829.1 $ 110.6 $ 939.7 Wolverine Boston Group 374.3 124.1 498.4 570.7 106.1 676.8 Other 28.1 2.5 30.6 46.3 3.5 49.8 Total $ 993.3 $ 288.2 $ 1,281.5 $ 1,446.1 $ 220.2 $ 1,666.3
Contract with Customer, Asset and Liability [Table Text Block]	The Company’s contract balances are as follows: (In millions) September 26, December 28, September 28, Product returns reserve $ 9.3 $ 11.4 $ 9.5 Customer markdowns reserve 4.0 4.4 3.6 Other sales incentives reserve 4.3 2.3 1.9 Customer rebates liability 13.9 12.0 10.8 Customer advances liability 2.0 7.2 5.4

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 26, 2020
Debt Disclosure [Abstract]
Schedule of Borrowings	Total debt consists of the following obligations: (In millions) September 26, December 28, September 28, Term Loan A, due December 6, 2023 $ 185.0 $ 192.5 $ 195.0 Incremental Term Loan, due May 4, 2021 150.0 — — Senior Notes, 5.000% interest, due September 1, 2026 250.0 250.0 250.0 Senior Notes, 6.375% interest, due May 15, 2025 300.0 — — Borrowings under revolving credit agreements — 360.0 493.3 Unamortized deferred financing costs (8.4) (4.1) (4.3) Total debt $ 876.6 $ 798.4 $ 934.0

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 26, 2020
Leases [Abstract]
Lease, Cost [Table Text Block]	The following is a summary of the Company’s lease cost. Quarter Ended Year-To-Date Ended (In millions) September 26, September 28, September 26, September 28, Operating lease cost $ 7.9 $ 8.1 $ 24.2 $ 24.3 Variable lease cost 3.0 3.6 9.1 10.9 Short-term lease cost 0.3 0.3 0.8 0.9 Sublease income (1.2) (1.0) (3.5) (2.9) Total lease cost $ 10.0 $ 11.0 $ 30.6 $ 33.2
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	Future undiscounted cash flows for operating leases for the fiscal periods subsequent to September 26, 2020 are as follows: (In millions) Operating Leases Remainder of 2020 $ 10.6 2021 31.3 2022 28.4 2023 21.2 2024 18.3 Thereafter 107.8 Total future payments 217.6 Less: imputed interest 48.0 Recognized lease liability $ 169.6

Financial Instruments and Ris_2

Financial Instruments and Risk Management (Tables)	9 Months Ended
	Sep. 26, 2020
Investments, All Other Investments [Abstract]
Schedule of Derivative Instruments [Table Text Block]	The notional amounts of the Company’s derivative instruments are as follows: (Dollars in millions) September 26, December 28, September 28, Foreign exchange contracts: Hedge contracts $ 188.3 $ 246.3 $ 237.7 Non-hedge contracts — 7.3 — Interest rate swap 293.9 355.8 366.2 Cross currency swap 79.8 79.8 79.8
Schedule of Derivative Assets at Fair Value [Table Text Block]	The recorded fair values of the Company’s derivative instruments are as follows: (In millions) September 26, December 28, September 28, Financial assets: Foreign exchange contracts - hedge $ 1.3 $ 2.3 $ 6.3 Financial liabilities: Foreign exchange contracts - hedge $ (0.4) $ (1.8) $ (0.2) Interest rate swap (8.6) (1.8) (3.0) Cross currency swap (6.2) (3.0) (2.1)

Retirement Plans (Tables)

Retirement Plans (Tables)	9 Months Ended
	Sep. 26, 2020
Retirement Benefits [Abstract]
Summary of Net Pension and SERP Expense Recognized	The following is a summary of net pension and Supplemental Executive Retirement Plan (“SERP”) expense recognized by the Company. Quarter Ended Year-To-Date Ended (In millions) September 26, September 28, September 26, September 28, Service cost pertaining to benefits earned during the period $ 1.6 $ 1.3 $ 4.8 $ 4.1 Interest cost on projected benefit obligations 3.6 3.8 10.7 11.4 Expected return on pension assets (4.7) (4.4) (14.0) (13.3) Net amortization loss 1.6 0.7 4.9 2.0 Net pension expense $ 2.1 $ 1.4 $ 6.4 $ 4.2

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 26, 2020
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (Loss)	The change in accumulated other comprehensive income (loss) during the quarters ended September 26, 2020 and September 28, 2019 is as follows: (In millions) Foreign Derivatives Pension Total Balance at June 29, 2019 $ (48.0) $ (2.8) $ (35.2) $ (86.0) Other comprehensive income (loss) before reclassifications (1) (5.6) 5.5 — (0.1) Amounts reclassified from accumulated other comprehensive income (loss) — (4.2) (2) 0.7 (3) (3.5) Income tax expense (benefit) — 1.1 (0.1) 1.0 Net reclassifications — (3.1) 0.6 (2.5) Net current-period other comprehensive income (loss) (1) (5.6) 2.4 0.6 (2.6) Balance at September 28, 2019 $ (53.6) $ (0.4) $ (34.6) $ (88.6) Balance at June 27, 2020 $ (55.9) $ (9.5) $ (46.1) $ (111.5) Other comprehensive income (loss) before reclassifications (1) 6.8 (5.5) — 1.3 Amounts reclassified from accumulated other comprehensive income (loss) — 0.5 (2) 1.6 (3) 2.1 Income tax expense (benefit) — 0.2 (0.3) (0.1) Net reclassifications — 0.7 1.3 2.0 Net current-period other comprehensive income (loss) (1) 6.8 (4.8) 1.3 3.3 Balance at September 26, 2020 $ (49.1) $ (14.3) $ (44.8) $ (108.2) (1) Other comprehensive income (loss) is reported net of taxes and noncontrolling interest. (2) Amounts related to foreign currency derivatives are included in cost of goods sold. Amounts related to foreign currency derivatives that are no longer deemed to be highly effective are included in other income. Amounts related to the interest rate swap and the cross-currency swap are included in interest expense. (3) Amounts reclassified are included in the computation of net pension expense. The change in accumulated other comprehensive income (loss) during the year-to-dates ended September 26, 2020 and September 28, 2019 is as follows: (In millions) Foreign Derivatives Pension Total Balance at December 29, 2018 $ (53.0) $ 0.9 $ (36.2) $ (88.3) Other comprehensive income (loss) before reclassifications (1) (0.6) 4.7 — 4.1 Amounts reclassified from accumulated other comprehensive income (loss) — (7.7) (2) 2.0 (3) (5.7) Income tax expense (benefit) — 1.7 (0.4) 1.3 Net reclassifications — (6.0) 1.6 (4.4) Net current-period other comprehensive income (loss) (1) (0.6) (1.3) 1.6 (0.3) Balance at September 28, 2019 $ (53.6) $ (0.4) $ (34.6) $ (88.6) Balance at December 28, 2019 $ (47.6) $ (5.8) $ (48.7) $ (102.1) Other comprehensive income (loss) before reclassifications (1) (1.5) (6.2) — (7.7) Amounts reclassified from accumulated other comprehensive income (loss) — (3.1) (2) 4.9 (3) 1.8 Income tax expense (benefit) — 0.8 (1.0) (0.2) Net reclassifications — (2.3) 3.9 1.6 Net current-period other comprehensive income (loss) (1) (1.5) (8.5) 3.9 (6.1) Balance at September 26, 2020 $ (49.1) $ (14.3) $ (44.8) $ (108.2) (1) Other comprehensive income (loss) is reported net of taxes and noncontrolling interest. (2) Amounts related to foreign currency derivatives are included in cost of goods sold. Amounts related to foreign currency derivatives that are no longer deemed to be highly effective are included in other income. Amounts related to the interest rate swap and the cross-currency swap are included in interest expense. (3) Amounts reclassified are included in the computation of net pension expense.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 26, 2020
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following table sets forth financial assets and liabilities measured at fair value in the consolidated condensed balance sheets and the respective pricing levels to which the fair value measurements are classified within the fair value hierarchy. Fair Value Measurements Quoted Prices With Other Observable Inputs (Level 2) (In millions) September 26, December 28, September 28, Financial assets: Derivatives $ 1.3 $ 2.3 $ 6.3 Financial liabilities: Derivatives $ (15.2) $ (6.6) $ (5.3)
Fair Value, by Balance Sheet Grouping [Table Text Block]	The carrying amount of these financial instruments is historical cost, which approximates fair value, except for the debt. The carrying value and the fair value of the Company’s debt are as follows: (In millions) September 26, December 28, September 28, Carrying value $ 876.6 $ 798.4 $ 934.0 Fair value 921.1 817.6 952.8

Litigation and Contingencies (T

Litigation and Contingencies (Tables)	9 Months Ended
	Sep. 26, 2020
Commitments and Contingencies Disclosure [Abstract]
Environmental Exit Costs by Cost [Table Text Block]	The following is a summary of the activity with respect to the environmental remediation reserve established by the Company: Year-To-Date Ended (In millions) September 26, September 28, Remediation liability at beginning of the year $ 124.4 $ 22.6 Changes in estimate — — Amounts paid (27.1) (7.8) Remediation liability at the end of the quarter $ 97.3 $ 14.8
Minimum Royalty and Advertising Obligations Due Under Terms of Certain Licenses Held by Company	(In millions) 2020 2021 2022 2023 2024 Thereafter Minimum royalties $ 0.4 $ 1.7 $ 1.8 $ — $ — $ — Minimum advertising — 3.3 3.4 3.5 3.6 —

Business Segments (Tables)

Business Segments (Tables)	9 Months Ended
	Sep. 26, 2020
Segment Reporting [Abstract]
Revenue and Operating Profit by Segment	Quarter Ended Year-To-Date Ended (In millions) September 26, September 28, September 26, September 28, Revenue: Wolverine Michigan Group $ 287.3 $ 318.8 $ 752.5 $ 939.7 Wolverine Boston Group 193.8 241.3 498.4 676.8 Other 12.0 14.2 30.6 49.8 Total $ 493.1 $ 574.3 $ 1,281.5 $ 1,666.3 Operating profit (loss): Wolverine Michigan Group $ 52.3 $ 66.0 $ 133.8 $ 183.8 Wolverine Boston Group 33.0 46.5 60.4 115.7 Other 0.7 0.7 1.0 3.0 Corporate (43.4) (44.9) (128.2) (126.3) Total $ 42.6 $ 68.3 $ 67.0 $ 176.2
Assets and Goodwill by Segment	(In millions) September 26, December 28, September 28, Total assets: Wolverine Michigan Group $ 691.8 $ 773.8 $ 814.8 Wolverine Boston Group 1,322.5 1,354.8 1,404.6 Other 33.6 38.4 43.8 Corporate 453.2 313.0 205.3 Total $ 2,501.1 $ 2,480.0 $ 2,468.5 Goodwill: Wolverine Michigan Group $ 143.9 $ 144.4 $ 143.1 Wolverine Boston Group 293.9 294.5 293.9 Total $ 437.8 $ 438.9 $ 437.0

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 28, 2019
Business Combinations [Abstract]
Schedule of Consideration Transferred	The detailed amounts of each component of the purchase consideration are as follows: (In millions) Purchase Consideration Cash paid $ 15.1 Extinguishment of Sportlab’s accounts payable balance 4.6 Contingent consideration 5.5 Total purchase consideration $ 25.2
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The final allocation of the purchase price as of December 28, 2019 was: (In millions) Initial Valuation Accounts receivable $ 1.8 Inventories 6.2 Goodwill 12.0 Amortizable intangibles 12.9 Total assets acquired 32.9 Deferred income taxes 3.2 Other liabilities 4.5 Total liabilities assumed 7.7 Net assets acquired $ 25.2

Earnings Per Share (Computation

Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,185,864	1,228,157	1,184,559	131,004
Numerator:
Net earnings attributable to Wolverine World Wide, Inc.	$ 22.4	$ 48.7	$ 33.8	$ 129.4
Adjustment for earnings allocated to non-vested restricted common stock	(0.6)	(1)	(0.8)	(2.6)
Net earnings used in calculating basic earnings per share	21.8	47.7	33	126.8
Adjustment for earnings reallocated from non-vested restricted common stock	0	0	0	0.1
Net earnings used in calculating basic and diluted earnings per share	$ 21.8	$ 47.7	$ 33	$ 126.9
Denominator:
Weighted average shares outstanding	81,900,000	83,500,000	81,700,000	87,300,000
Adjustment for non-vested restricted common stock	(900,000)	(500,000)	(700,000)	(700,000)
Shares used in calculating basic earnings per share	81,000,000	83,000,000	81,000,000	86,600,000
Effect of dilutive stock options	500,000	900,000	500,000	1,400,000
Shares used in calculating diluted earnings per share	81,500,000	83,900,000	81,500,000	88,000,000
Net earnings per share:
Basic	$ 0.27	$ 0.57	$ 0.41	$ 1.46
Diluted	$ 0.27	$ 0.57	$ 0.41	$ 1.44

Goodwill and Indefinite-Lived_3

Goodwill and Indefinite-Lived Intangibles (Changes in the Carrying Amount of Goodwill and Indefinite-Lived Intangibles) (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Dec. 28, 2019
Goodwill [Roll Forward]
Goodwill, Beginning balance	$ 438.9	$ 424.4	$ 424.4
Goodwill, Acquired During Period	0	12.3	12
Foreign currency translation effects	(1.1)	0.3
Goodwill, Ending balance	$ 437.8	$ 437	$ 438.9

Goodwill and Indefinite-Lived_4

Goodwill and Indefinite-Lived Intangibles Additional Information (Details) - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangibles	$ 604.5	$ 604.5	$ 604.5
Sperry [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangibles	$ 518.2

Accounts Receivable (Details)

Accounts Receivable (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 26, 2020	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale of accounts receivable, maximum amount under agreement	$ 75	$ 75
Sale of accounts receivable percent paid at sale	90.00%	90.00%
Accounts receivable sold	$ 0	$ 14.1
Fee charged on sale of accounts receivable	0	0.1
Accounts receivable, reduction due to sale	$ 0	$ 0	$ 0	$ 0

Revenue From Contracts With C_3

Revenue From Contracts With Customers Additional Information (Details) $ in Millions	Sep. 26, 2020USD ($)
Revenue Recognition [Abstract]
Remaining Fixed Transaction Price	$ 25.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year	2024

Revenue From Contracts With C_4

Revenue From Contracts With Customers Disaggrated Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Revenue	$ 493.1	$ 574.3	$ 1,281.5	$ 1,666.3
Wolverine Michigan Group [Member]
Revenue	287.3	318.8	752.5	939.7
Wolverine Boston Group [Member]
Revenue	193.8	241.3	498.4	676.8
Other [Member]
Revenue	12	14.2	30.6	49.8
Wholesale Channel [Member]
Revenue	388.9	495.9	993.3	1,446.1
Wholesale Channel [Member] | Wolverine Michigan Group [Member]
Revenue	227.6	279.5	590.9	829.1
Wholesale Channel [Member] | Wolverine Boston Group [Member]
Revenue	150.7	203.5	374.3	570.7
Wholesale Channel [Member] | Other [Member]
Revenue	10.6	12.9	28.1	46.3
Consumer-Direct Channel [Member]
Revenue	104.2	78.4	288.2	220.2
Consumer-Direct Channel [Member] | Wolverine Michigan Group [Member]
Revenue	59.7	39.3	161.6	110.6
Consumer-Direct Channel [Member] | Wolverine Boston Group [Member]
Revenue	43.1	37.8	124.1	106.1
Consumer-Direct Channel [Member] | Other [Member]
Revenue	$ 1.4	$ 1.3	$ 2.5	$ 3.5

Revenue From Contracts With C_5

Revenue From Contracts With Customers Contract Balances (Details) - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019
Revenue from Contracts with Customer [Abstract]
Product Returns Reserve	$ 9.3	$ 11.4	$ 9.5
Customer Markdowns Reserve	4	4.4	3.6
Sales Incentives Reserve	4.3	2.3	1.9
Customer Rebates Liability	13.9	12	10.8
Customer Advances, Current	$ 2	$ 7.2	$ 5.4

Debt (Schedule of Borrowings) (

Debt (Schedule of Borrowings) (Details) - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019
Debt Instrument [Line Items]
Borrowings under revolving credit agreements	$ 0	$ 360	$ 493.3
Debt Issuance Costs, Noncurrent, Net	(8.4)	(4.1)	(4.3)
Total debt	876.6	798.4	934
Term Loan A [Member] | December Sixth Two Thousand Twenty Three [Domain]
Debt Instrument [Line Items]
Long-term debt	185	192.5	195
Term Loan A [Member] | May Fourth Two Thousand Twenty One [Domain]
Debt Instrument [Line Items]
Long-term debt	150	0	0
Senior Notes [Member] | September First Two Thousand Twenty Six [Member]
Debt Instrument [Line Items]
Long-term debt	250	250	250
Senior Notes [Member] | May Fifteenth Two Thousand Twenty Five [Domain]
Debt Instrument [Line Items]
Long-term debt	$ 300	$ 0	$ 0

Debt (Additional Information) (

Debt (Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019	Dec. 28, 2019
Debt Instrument [Line Items]
Repayments of Debt	$ 21
Current maturities of long-term debt	162.5	$ 10	$ 162.5	$ 10	$ 12.5
Borrowings under revolving credit agreements	0	493.3	0	493.3	360
Amortization of deferred financing costs	0.9	0.4	2	1.2
Debt Issuance Costs, Noncurrent, Net	8.4	4.3	8.4	4.3	4.1
Total debt	876.6	934	876.6	934	798.4
Maximum [Member]
Debt Instrument [Line Items]
Aggregate principal amount debt instrument	1,750		$ 1,750
Alternative Base Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate			1.00%
Alternative Base Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate			0.125%
Euro Currency Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate			2.00%
Euro Currency Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate			1.125%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Aggregate principal amount debt instrument	800		$ 800
Outstanding letters of credit	6	3.9	6	3.9	5.7
Foreign Currency Subfacility [Member]
Debt Instrument [Line Items]
Revolving credit facility amount	200		200
Swingline Subfacility [Member]
Debt Instrument [Line Items]
Revolving credit facility amount	50		50
Letter of Credit Subfacility [Member]
Debt Instrument [Line Items]
Revolving credit facility amount	50		50
Foreign Line of Credit [Member]
Debt Instrument [Line Items]
Revolving credit facility amount	4		4
Borrowings under revolving credit agreements	0	0.3	0	0.3	0
September First Two Thousand Twenty Six [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount	250	250	250	250	250
Aggregate principal amount debt instrument	$ 250		$ 250
Interest rate	5.00%		5.00%
December Sixth Two Thousand Twenty Three [Domain] | Term Loan A [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount	$ 185	195	$ 185	195	192.5
Aggregate principal amount debt instrument	$ 200		$ 200
Weighted average interest rate	3.78%		3.78%
May Fourth Two Thousand Twenty One [Domain] | Term Loan A [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount	$ 150	0	$ 150	0	0
Aggregate principal amount debt instrument	171		171
May Fifteenth Two Thousand Twenty Five [Domain] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount	$ 300	$ 0	$ 300	$ 0	$ 0
Interest rate	6.375%		6.375%

Leases Operating Lease Costs (D

Leases Operating Lease Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Leases [Abstract]
Operating Lease, Expense	$ 7.9	$ 8.1	$ 24.2	$ 24.3
Variable Lease, Cost	3	3.6	9.1	10.9
Short-term Lease, Cost	0.3	0.3	0.8	0.9
Sublease Income	(1.2)	(1)	(3.5)	(2.9)
Lease, Cost	$ 10	$ 11	$ 30.6	$ 33.2

Leases Future Lease Payments (D

Leases Future Lease Payments (Details) $ in Millions	Sep. 26, 2020USD ($)
Leases [Abstract]
Remainder of 2019	$ 10.6
2020	31.3
2021	28.4
2022	21.2
2023	18.3
Thereafter	107.8
Lessee, Operating Lease, Liability, Payments, Due	217.6
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(48)
Operating Lease, Liability	$ 169.6

Financial Instruments and Ris_3

Financial Instruments and Risk Management (Derivative Notional Amounts) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019
Foreign exchange contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Net Hedge Ineffectiveness Gain (Loss)	$ 1.3
Foreign exchange contracts [Member] | Hedge [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	188.3	$ 246.3	$ 237.7
Foreign exchange contracts [Member] | Non-hedge [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	0	7.3	0
Interest rate swaps [Member] | Hedge [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	293.9	355.8	366.2
Cross currency swap [Member] | Hedge [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	$ 79.8	$ 79.8	$ 79.8

Financial Instruments and Ris_4

Financial Instruments and Risk Management Derivative Recorded Values (Details) - Hedge [Member] - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019
Foreign exchange contracts [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange contracts, asset	$ 1.3	$ 2.3	$ 6.3
Foreign exchange contracts liabilities	(0.4)	(1.8)	(0.2)
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Interest rate swap, liabilities	(8.6)	(1.8)	(3)
Cross currency swap [Member]
Derivatives, Fair Value [Line Items]
Cross currency swap, liabilities	$ (6.2)	$ (3)	$ (2.1)

Financial Instruments and Ris_5

Financial Instruments and Risk Management (Additional Information) (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Dec. 28, 2019
Foreign exchange contracts [Member]
Financial Instruments And Derivatives [Line Items]
Maximum remaining maturity of foreign currency derivatives	545 days	545 days	545 days
Derivative, Net Hedge Ineffectiveness Gain (Loss)	$ 1.3
Interest rate swaps [Member]
Financial Instruments And Derivatives [Line Items]
Financial instrument expiration date	Dec. 6, 2023
Cross currency swap [Member]
Financial Instruments And Derivatives [Line Items]
Financial instrument expiration date	Sep. 1, 2021
Derivative, Fixed Interest Rate	2.75%
Derivative, Forward Interest Rate	5.00%

Stock-Based Compensation (Addit

Stock-Based Compensation (Additional Information) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 11.3	$ 7.1	$ 21.5	$ 17.3
Related income tax benefits on share based compensation	$ 2.2	$ 1.5	$ 4.2	$ 3.5
Restricted Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards Issued			1,340,179	547,169
Awards Issued, Weighted Average Grant Date Fair Value			$ 22.29	$ 34.80
Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards Issued			346,584	344,433
Awards Issued, Weighted Average Grant Date Fair Value			$ 35.02	$ 37.33

Retirement Plans (Summary of Ne

Retirement Plans (Summary of Net Pension and Supplemental Executive Retirement Plan Expense Recognized) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Retirement Benefits [Abstract]
Service cost pertaining to benefits earned during the period	$ 1.6	$ 1.3	$ 4.8	$ 4.1
Interest cost on projected benefit obligations	3.6	3.8	10.7	11.4
Expected return on pension assets	(4.7)	(4.4)	(14)	(13.3)
Net amortization loss	1.6	0.7	4.9	2
Net pension expense	$ 2.1	$ 1.4	$ 6.4	$ 4.2

Income Taxes (Additional Inform

Income Taxes (Additional Information) (Details)	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Income Tax Disclosure [Abstract]
Effective Income Tax Rate, Percent	28.50%	20.30%	15.50%	17.90%

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance AOCI	$ (111.5)	$ (86)	$ (102.1)	$ (88.3)
Accumulated other comprehensive loss	(111.5)	(88.6)	(102.1)	(88.3)
Other comprehensive income (loss) before reclassifications	1.3	(0.1)	(7.7)	4.1
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(3.3)	2.6	6.1	0.3
Amounts reclassified from AOCI	2.1	(3.5)	1.8	(5.7)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax	(0.1)	1	(0.2)	1.3
Net reclassifications	2	(2.5)	1.6	(4.4)
Other Comprehensive Income (Loss), Net of Tax	3.5	(3)	(7)	(0.6)
Ending balance AOCI	(108.2)	(88.6)	(108.2)	(88.6)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance AOCI	(55.9)	(48)	(47.6)	(53)
Accumulated other comprehensive loss	(49.1)	(53.6)	(47.6)	(53.6)
Other comprehensive income (loss) before reclassifications	6.8	(5.6)	(1.5)	(0.6)
Amounts reclassified from AOCI	0	0	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax	0	0	0	0
Net reclassifications	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax	(6.8)	5.6	1.5	0.6
Ending balance AOCI	(49.1)	(53.6)	(49.1)	(53.6)
Derivatives [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance AOCI	(9.5)	(2.8)	(5.8)	0.9
Accumulated other comprehensive loss	(14.3)	(0.4)	(14.3)	(0.4)
Other comprehensive income (loss) before reclassifications	(5.5)	5.5	(6.2)	4.7
Amounts reclassified from AOCI	0.5	(4.2)	(3.1)	(7.7)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax	0.2	1.1	0.8	1.7
Net reclassifications	0.7	(3.1)	(2.3)	(6)
Other Comprehensive Income (Loss), Net of Tax	4.8	(2.4)	8.5	1.3
Ending balance AOCI	(14.3)	(0.4)	(14.3)	(0.4)
Pension adjustments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance AOCI	(46.1)	(35.2)	(48.7)	(36.2)
Accumulated other comprehensive loss	(44.8)	(34.6)	(48.7)	(36.2)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from AOCI	1.6	0.7	4.9	2
Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax	(0.3)	(0.1)	(1)	(0.4)
Net reclassifications	1.3	0.6	3.9	1.6
Other Comprehensive Income (Loss), Net of Tax	(1.3)	(0.6)	(3.9)	(1.6)
Ending balance AOCI	$ (44.8)	$ (34.6)	$ (44.8)	$ (34.6)

Fair Value Measurements Recurri

Fair Value Measurements Recurring Fair Value Measurements (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 1.3	$ 2.3	$ 6.3
Derivative Liability	$ (15.2)	$ (6.6)	$ (5.3)

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Disclosures (Details) - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019
Fair Value Disclosures [Abstract]
Debt, Carrying Value	$ 876.6	$ 798.4	$ 934
Debt, Fair Value	$ 921.1	$ 817.6	$ 952.8

Litigation and Contingencies En

Litigation and Contingencies Environmental Remediation (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 26, 2020	Sep. 26, 2020	Sep. 28, 2019
Environmental Exit Cost [Line Items]
Site Contingency, Recovery from Third Party of Environmental Remediation Cost		$ 55
Insurance Recoveries	$ 1.2	7
Accrual for Environmental Loss Contingencies [Roll Forward]
Remediation liability at beginning of the year		124.4	$ 22.6
Changes in estimate		0	0
Amounts paid		(27.1)	(7.8)
Remediation liability at the end of the quarter	97.3	97.3	$ 14.8
Environmental remediation accrual, current	23.7	23.7
Environmental remediation accrual, noncurrent	$ 73.6	$ 73.6

Litigation and Contingencies Mi

Litigation and Contingencies Minimum Royalty and Advertising Obligations Due Under Terms of Certain Licenses Held by Company (Details) $ in Millions	Sep. 26, 2020USD ($)
Royalties [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2019	$ 0.4
2020	1.7
2021	1.8
2022	0
2023	0
Thereafter	0
Advertising [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2019	0
2020	3.3
2021	3.4
2022	3.5
2023	3.6
Thereafter	$ 0

Litigation and Contingencies (A

Litigation and Contingencies (Additional Information) (Details) - Licensing agreements [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Long-term Purchase Commitment [Line Items]
Royalty expense, licensing agreements	$ 0.5	$ 0.6	$ 1.4	$ 1.6
Advertising expense, licensing agreements	$ 0.4	$ 0.9	$ 1.4	$ 2.8

Business Segments (Revenue and

Business Segments (Revenue and Operating Profit by Segment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Segment Reporting Information [Line Items]
Revenue	$ 493.1	$ 574.3	$ 1,281.5	$ 1,666.3
Operating profit (loss)	42.6	68.3	67	176.2
Wolverine Michigan Group [Member]
Segment Reporting Information [Line Items]
Revenue	287.3	318.8	752.5	939.7
Operating profit (loss)	52.3	66	133.8	183.8
Wolverine Boston Group [Member]
Segment Reporting Information [Line Items]
Revenue	193.8	241.3	498.4	676.8
Operating profit (loss)	33	46.5	60.4	115.7
Other [Member]
Segment Reporting Information [Line Items]
Revenue	12	14.2	30.6	49.8
Operating profit (loss)	0.7	0.7	1	3
Corporate [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)	$ (43.4)	$ (44.9)	$ (128.2)	$ (126.3)

Business Segments (Assets and G

Business Segments (Assets and Goodwill by Segment) (Details) - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019	Dec. 29, 2018
Segment Reporting Information [Line Items]
Total assets	$ 2,501.1	$ 2,480	$ 2,468.5
Goodwill	437.8	438.9	437	$ 424.4
Wolverine Michigan Group [Member]
Segment Reporting Information [Line Items]
Total assets	691.8	773.8	814.8
Goodwill	143.9	144.4	143.1
Wolverine Boston Group [Member]
Segment Reporting Information [Line Items]
Total assets	1,322.5	1,354.8	1,404.6
Goodwill	293.9	294.5	293.9
Other [Member]
Segment Reporting Information [Line Items]
Total assets	33.6	38.4	43.8
Corporate [Member]
Segment Reporting Information [Line Items]
Total assets	$ 453.2	$ 313	$ 205.3

Business Combinations -- Schedu

Business Combinations -- Schedule of Consideration Transferred (Details) $ in Millions	12 Months Ended
	Dec. 28, 2019USD ($)
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 15.1
Business Combination, Consideration Transferred, Liabilities Incurred	4.6
Business Combination, Consideration Transferred, Other	5.5
Business Combination, Consideration Transferred	$ 25.2

Business Combinations - Schedul

Business Combinations - Schedule of Recognized Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Dec. 28, 2019
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables			$ 1.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory			6.2
Goodwill, Acquired During Period	$ 0	$ 12.3	12
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			12.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets			32.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities			3.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other			4.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			7.7
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net			$ 25.2

Business Combinations (Details)

Business Combinations (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Dec. 28, 2019
Business Acquisition [Line Items]
Business Combination, Consideration Transferred			$ 25.2
Goodwill, Acquired During Period	$ 0	$ 12.3	12
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			12.9
Customer Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 11.2
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			14 years
Order or Production Backlog [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 1.7
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			7 months