| Description of Business and Summary of Significant Accounting Policies | Note 1.
Description of Business and Summary of Significant Accounting Policies Description of Business Unless the context otherwise requires, we , us , our , WestRock Company WRKCo WestRock is a multinational provider of sustainable fiber-based paper and packaging solutions. We partner with our customers to provide differentiated, sustainable paper and packaging solutions that help them win in the marketplace. Our team members support customers around the world from our operating and business locations in North America, South America, Europe, Asia and Australia. On November 2, 2018, we completed the KapStone Acquisition. KapStone is a leading North American producer and distributor of containerboard, corrugated products and specialty papers, including liner and medium containerboard, kraft papers and saturating kraft. KapStone also owns Victory Packaging, a packaging solutions distribution company with facilities in the U.S., Canada and Mexico. KapStone is reported in our Corrugated Packaging segment. WRKCo was the accounting acquirer in the transaction; therefore, the historical consolidated financial statements of WRKCo for periods prior to the KapStone Acquisition are also considered to be the historical financial statements of the Company. See “ Note 3. Acquisitions and Investments Basis of Presentation and Principles of Consolidation The preparation of financial statements in accordance with GAAP requires management to use judgment in the application of accounting policies, including making estimates and assumptions. Actual results may differ from these estimates. The consolidated financial statements include the accounts of WestRock and our partially owned subsidiaries for which we have a controlling financial interest, including variable interest entities for which we are the primary beneficiary. Equity investments in which we exercise significant influence but do not control and are not the primary beneficiary are accounted for using the equity method. Investments without a readily determinable value in which we are not able to exercise significant influence over the investee are accounted under the measurement alternative (i.e., cost less impairment, adjusted for any qualifying observable price changes). Our investments accounted for under the equity method or the measurement alternative method are not material either individually or in the aggregate. We have eliminated all significant intercompany accounts and transactions. See “ Note 7. Segment Information Reclassifications and Adjustments During fiscal 2021, we corrected our interest, net of amounts capitalized supplemental disclosure for the prior years by an immaterial amount. Certain amounts in prior periods have been reclassified to conform with the current year presentation. COVID-19 Pandemic COVID-19 continues to evolve. The pandemic has affected our operational and financial performance to varying degrees and the extent of its effect on our operational and financial performance will continue to depend on future developments, which are highly uncertain and cannot be predicted with confidence, including the duration, scope and severity of the pandemic (including due to new variants such as Delta), the actions taken to contain or mitigate its impact (including the distribution and effectiveness of vaccines), and the direct and indirect economic effects of the pandemic and related containment measures and government responses, among others. Our net sales, primarily in the last half of fiscal 2020, were negatively impacted by COVID-19, and we have experienced and are currently experiencing higher supply chain costs and tight labor markets in part due to the impacts of COVID-19. Ransomware Incident As previously disclosed, on January 23, 2021 we detected a ransomware incident impacting certain of our systems. Promptly upon our detection of this incident, we initiated response and containment protocols and our security teams, supplemented by leading cyber defense firms, worked to remediate this incident. These actions included taking preventative measures, including shutting down certain systems out of an abundance of caution, as well as taking steps to supplement existing security monitoring, scanning and protective measures. We notified law enforcement and contacted our customers to apprise them of the situation. We undertook extensive efforts to identify, contain and recover from this incident quickly and securely. Our teams worked to maintain our business operations and minimize the impact on our customers and teammates. In our second quarter Form 10-Q, we announced that all systems were back in service. All of our mills and converting locations began producing and shipping paper and packaging at pre-ransomware levels in March 2021 or earlier. Our mill system production was approximately 115,000 tons lower than planned for the quarter ended March 31, 2021 as a result of this incident. While shipments from some of our facilities initially lagged behind production levels, this gap closed as systems were restored during the second quarter of fiscal 2021. In locations where technology issues were identified, we used alternative methods, in many cases manual methods, to process and ship orders. We systematically brought our information systems back online in a controlled, phased approach. We estimate the pre-tax income impact of the lost sales and operational disruption of this incident on our operations in the second quarter of fiscal 2021 was approximately $50 million, as well as approximately $20 million of ransomware recovery costs, primarily professional fees. In addition, we incurred approximately $9 million of ransomware recovery costs in the third quarter of fiscal 2021. In the fourth quarter of fiscal 2021, we recorded a $15 million credit for preliminary recoveries – approximately $10 million as a reduction of SG&A excluding intangible amortization and approximately $5 million as a reduction of cost of goods sold. We expect to recover substantially all of the remaining ransomware losses from cyber and business interruption insurance in future periods. Disputes over the extent of insurance coverage for claims are not uncommon, and there will be a time lag between the incurrence of costs and the receipt of any insurance proceeds. In response to the ransomware event, we accelerated information technology investments that we had previously planned to make in future periods in order to further strengthen our information security and technology infrastructure. We engaged a leading cybersecurity defense firm that completed a forensics investigation of the ransomware incident and we are taking appropriate actions in response to the findings. For example, in the short-term, we reset all credentials Company-wide and strengthened security tooling across our servers and workstations. Longer term, in collaboration with our strategic partners, we established a roadmap to advance the maturity and effectiveness of our information security and resiliency capabilities. This roadmap includes initiatives to further strengthen our information security posture across the Company, and to enable us to potentially detect, respond to and recover from security and technical incidents in a faster and more effective manner. More specifically, we are progressing projects to bolster our security monitoring capabilities, strengthen our access controls, reduce risks associated with third-parties, and to enhance the information security of our mills and plants. Use of Estimates Preparing consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates, and the differences could be material. We use estimates in accounting for, among other things, impairment testing of goodwill and long-lived assets, useful lives for depreciation and amortization, income tax expenses, deferred income tax assets and potential income tax assessments, pension benefits, self-insured obligations, restructuring activities, fair values related to business acquisition accounting, slow-moving and obsolete inventory, allowance for doubtful accounts, share-based compensation and loss contingencies. Various assumptions and other factors underlie the determination of these estimates. The process of determining significant estimates is fact specific and takes into account factors such as historical experience, current and expected economic conditions, product mix, and in some cases, actuarial techniques. The global impact of the COVID-19 pandemic may also affect our accounting estimates, which may materially change from period to period due to changing market factors. We regularly evaluate these significant factors and make adjustments where facts and circumstances dictate. Revenue Recognition We generally recognize revenue on a point-in-time basis when the customer takes title to the goods and assumes the risks and rewards for the goods, which coincide with the transfer of control of our goods to the customer. Additionally, we manufacture certain customized products that have no alternative use to us (since they are made to specific customer orders), and we believe that for certain customers we have a legally enforceable right to payment for performance completed to date on these products, including a reasonable profit. For products that meet these two criteria, we recognize revenue “over time”. This results in revenue recognition prior to the date of shipment or title transfer for these products and results in the recognition of a contract asset (unbilled receivables) balance with a corresponding reduction in finished goods inventory on our balance sheet. We net, against our gross sales, provisions for discounts, returns, allowances, customer rebates and other adjustments. Such adjustments are based on historical experience which is consistent with the most likely method as provided in ASC 606 “ Revenue from Contracts with Customers ASC 606 As permitted by ASC 606, we have elected to treat costs associated with obtaining new contracts as expenses when incurred if the amortization period of the asset we would recognize is one year or less. We do not record interest income when the difference in timing of control transfer and customer payment is one year or less. We also account for sales and other taxes that are imposed on and concurrent with individual revenue-producing transactions between a customer and us on a net basis which excludes the taxes from our net sales. Shipping and Handling Costs We classify shipping and handling costs, such as freight to our customers’ destinations, as a component of cost of goods sold. When shipping and handling costs are included in the sales price charged for our products, they are recognized in net sales since we treat shipping and handling as fulfilment activities. Cash Equivalents We consider all highly liquid investments that mature three months or less from the date of purchase to be cash equivalents. The carrying amounts of our cash and cash equivalents approximate fair market values. We place our cash and cash equivalents primarily with large credit worthy banks, which limits the amount of our credit exposure. Accounts Receivable and Allowances We derive our accounts receivable from revenue earned from customers located primarily in North America, South America, Europe, Asia and Australia. Given our diverse customer base, we have limited exposure to credit loss from any particular customer or industry segment, and hence we generally do not require collateral. We perform an evaluation of lifetime expected credit losses inherent in our accounts receivable at each balance sheet date. Such an evaluation includes consideration of historical loss experience, trends in customer payment frequency, present economic conditions, and judgment about the future financial health of our customers and industry sector. The average of our receivables collection is within 30 to 60 days. We are a party to accounts receivable sales agreements to sell to third-party financial institutions all of the short-term receivables generated from certain customer trade accounts. See “ Note 12. Fair Value — Accounts Receivable Sales Agreements We state accounts receivable at the amount owed by the customer, net of an allowance for estimated credit impairment losses, returns and allowances, cash discounts and other adjustments. We do not discount accounts receivable because we generally collect accounts receivable over a relatively short time. We charge off receivables when they are determined to be no longer collectible. Bad debt expense was a credit of $9.4 million in fiscal 2021 and expense of $19.9 million and $10.0 million in fiscal 2020 and 2019, respectively. The following table represents a summary of the changes in the reserve for allowance for doubtful accounts, returns and allowances and cash discounts for fiscal 2021, 2020 and 2019 (in millions):
2021
2020
2019
Balance at beginning of fiscal year
$
66.3
$
53.2
$
49.7
Reduction in sales and charges to costs and expenses
236.5
270.8
259.6
Deductions
(234.7
)
(257.7
)
(256.1
)
Balance at end of fiscal year
$
68.1
$
66.3
$
53.2
Inventories We value our U.S. inventories at the lower of cost or market, with cost for the majority of our U.S. inventories determined on the last-in first-out (“ LIFO FIFO “ Note 9. Inventories ” for additional information. Prior to the application of the LIFO method, our U.S. operating divisions use a variety of methods to estimate the FIFO cost of their finished goods inventories. Such methods include standard costs, or average costs computed by dividing the actual cost of goods manufactured by the tons produced and multiplying this amount by the tons of inventory on hand. Lastly, certain operations calculate a ratio, on a plant by plant basis, the numerator of which is the cost of goods sold and the denominator is net sales. This ratio is applied to the estimated sales value of the finished goods inventory. Variances and other unusual items are analyzed to determine whether it is appropriate to include those items in the value of inventory. Examples of variances and unusual items that are considered to be current period charges include, but are not limited to, production levels, freight, handling costs, and wasted materials (spoilage) that are determined to be abnormal. Cost includes raw materials and supplies, direct labor, indirect labor related to the manufacturing process and depreciation and other factory overheads. Our inventoried spare parts are measured at average cost. Leased Assets We adopted the provisions of ASC 842, “Leases” “ Note 14. Leases ” for additional information. We record our operating lease ROU assets and liabilities at the commencement date of the lease based on the present value of lease payments over the lease term. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Our leases may include options to extend or terminate the lease. These options to extend are included in the lease term when it is reasonably certain that we will exercise that option. While some leases provide for variable payments, they are not included in the ROU assets and liabilities because they are not based on an index or rate. Variable payments for real estate leases primarily relate to common area maintenance, insurance, taxes and utilities. Variable payments for equipment, vehicles and leases within supply agreements primarily relate to usage, repairs, and maintenance. As the implicit rate is not readily determinable for our leases, we apply a portfolio approach using an estimated incremental borrowing rate to determine the initial present value of lease payments over the lease terms on a collateralized basis over a similar term, which is based on market and company specific information. We use the unsecured borrowing rate and risk-adjust that rate to approximate a collateralized rate, and apply the rate based on the currency of the lease, which is updated on a monthly basis for measurement of new lease liabilities. We have made an accounting policy election to not recognize an ROU asset and liability for leases with a term of 12 months or less unless the lease includes an option to renew or purchase the underlying asset that we are reasonably certain to exercise. lease and non-lease components as a single lease component for all of the Company's leases. See “ Note 14. Leases ” for additional information . Property, Plant and Equipment We record property, plant and equipment at cost less accumulated depreciation. Cost includes major expenditures for improvements and replacements that extend useful lives, increase capacity, increase revenues or reduce costs, while normal maintenance and repairs are expensed as incurred. For financial reporting purposes, we provide depreciation and amortization primarily on a straight-line method generally over the estimated useful lives of the assets as follows:
Buildings and building improvements
15-40 years
Machinery and equipment
3-25 years
Transportation equipment
3-8 years Generally, our machinery and equipment have estimated useful lives between 3 and 25 years; however, select portions of machinery and equipment primarily at our mills have estimated useful lives up to 44 years. Greater than 90% of the cost of our mill assets have useful lives of 25 years or less. Leasehold improvements are depreciated over the shorter of the asset life or the lease term, generally between 3 and 10 years. Goodwill and Long-Lived Assets In accordance with ASC 350, “Intangibles — Goodwill and Other” ASC 350 allows an optional qualitative assessment, prior to a quantitative assessment test, to determine whether it is “more likely than not” that the fair value of a reporting unit exceeds its carrying amount. We generally do not attempt a qualitative assessment and move directly to the quantitative test. As part of the quantitative test, we utilize the present value of expected cash flows or, as appropriate, a combination of the present value of expected cash flows and the guideline public company method to determine the estimated fair value of our reporting units. This present value model requires management to estimate future cash flows, the timing of these cash flows, and a discount rate (based on a weighted average cost of capital), which represents the time value of money and the inherent risk and uncertainty of the future cash flows. Factors that management must estimate when performing this step in the process include, among other items, sales volume, prices, inflation, discount rates, exchange rates, tax rates, anticipated synergies and productivity improvements resulting from past acquisitions, capital expenditures and continuous improvement projects. The assumptions we use to estimate future cash flows are consistent with the assumptions that the reporting units use for internal planning purposes, which we believe would be generally consistent with that of a market participant. The guideline public company method involves comparing the reporting unit to similar companies whose stock is freely traded on an organized exchange. The fair values determined by the discounted cash flow and guideline public company methods are weighted to arrive at the concluded fair value of the reporting unit. However, in instances where comparisons to our peers is less meaningful, no weight is placed on the guideline public company method to arrive at the concluded fair value of the reporting unit. If we determine that the estimated fair value of the reporting unit exceeds its carrying amount, goodwill of the reporting unit is not impaired. If we determine that the carrying amount of the reporting unit exceeds its estimated fair value, we measure the goodwill impairment charge based on the excess of a reporting unit’s carrying amount over its fair value as required under ASU 2017-04 “ Simplifying the Test for Goodwill Impairment ”, which we early adopted starting with our fiscal 2020 annual goodwill impairment test on July 1, 2020. During the fourth quarter of fiscal 2021, we completed our annual goodwill impairment testing. We considered factors such as, but not limited to, our expectations for the short-term and long-term impacts of COVID-19, macroeconomic conditions, industry and market considerations, and financial performance, including planned revenue, earnings and capital investments of each reporting unit. 20% At September 30, 2021, the North American Corrugated, Consumer Packaging, Brazil Corrugated and Victory Packaging reporting units had $3,518.5 million, $2,295.9 million, $103.7 million and $41.1 million of goodwill, respectively, which remained recoverable at the current year-end. Subsequent to our annual test, we monitored industry economic trends until the end of our fiscal year and determined no additional testing for goodwill impairment was warranted. We have not made any material changes to our impairment loss assessment methodology during the past three fiscal years. Currently, we do not believe there is a reasonable likelihood that there will be a material change in future assumptions or estimates we use to calculate impairment losses. However, we cannot predict certain market factors with certainty, including the impact of COVID-19, and have certain risks inherent to our operations as described in Item 1A. “ Risk Factors ” We follow the provisions included in ASC 360, “Property, Plant, and Equipment” Included in our long-lived assets are certain identifiable intangible assets. These intangible assets are amortized based on the approximate pattern in which the economic benefits are consumed or straight-line if the pattern was not reliably determinable. Estimated useful lives range from 1 to 40 years and have a weighted average life of approximately 15.6 years. Our judgments regarding the existence of impairment indicators are based on legal factors, market conditions and operational performance. Future events could cause us to conclude that impairment indicators exist and that assets associated with a particular operation are impaired. Evaluating impairment also requires us to estimate future operating results and cash flows, which also require judgment by management. Any resulting impairment loss could have a material adverse impact on our financial condition and results of operations. Restructuring and Other Costs Our restructuring and other costs include primarily items such as restructuring portions of our operations, acquisition costs, integration costs and divestiture costs. We have restructured portions of our operations from time to time, have current restructuring initiatives taking place, and it is likely that we will engage in future restructuring activities. Identifying and calculating the cost to exit these operations requires certain assumptions to be made, the most significant of which are anticipated future liabilities, including severance costs, contractual obligations, and the adjustments of property, plant and equipment and lease ROU assets to their fair value. We believe our estimates are reasonable, considering our knowledge of the industries we operate in, previous experience in exiting activities and valuations we may obtain from independent third parties. Although our estimates have been reasonably accurate in the past, significant judgment is required, and these estimates and assumptions may change as additional information becomes available and facts or circumstances change. See “ Note 4. Restructuring and Other Costs ” for additional information, including a description of the type of costs incurred. Business Combinations From time to time, we may enter into business combinations. In accordance with ASC 805, “ Business Combinations The acquisition method of accounting also requires us to refine these estimates over a measurement period not to exceed one year to reflect new information obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts recognized as of that date. If we are required to adjust provisional amounts that we have recorded for the fair values of assets and liabilities in connection with acquisitions, these adjustments could have a material impact on our financial condition and results of operations. If the subsequent actual results and updated projections of the underlying business activity change compared with the assumptions and projections used to develop these values, we could record future impairment charges. In addition, we have estimated the economic lives of certain acquired assets and these lives are used to calculate depreciation and amortization expense. If our estimates of the economic lives change, depreciation or amortization expenses could be increased or decreased, or the acquired asset could be impaired. Fair Value of Financial Instruments and Nonfinancial Assets and Liabilities We estimate fair values in accordance with ASC 820, “Fair Value Measurement. Financial instruments not recognized at fair value on a recurring or nonrecurring basis include cash and cash equivalents, accounts receivables, certain other current assets, short-term debt, accounts payable, certain other current liabilities and long-term debt. With the exception of long-term debt, the carrying amounts of these financial instruments approximate their fair values due to their short maturities. The fair values of our long-term debt are estimated using quoted market prices or are based on the discounted value of future cash flows. We disclose the fair value of long-term debt in “ Note 13. Debt ” “ Note 5. Retirement Plans ” Supplemental Plans We measure certain nonfinancial assets and nonfinancial liabilities at fair value on a nonrecurring basis. These assets and liabilities include equity method investments when they are deemed to be other-than-temporarily impaired, investments for which the fair value measurement alternative is elected, assets acquired and liabilities assumed when they are deemed to be other-than-temporarily impaired, assets acquired and liabilities assumed in a merger or an acquisition or in a nonmonetary exchange, property, plant and equipment, ROU assets related to operating leases, goodwill and other intangible assets that are written down to fair value when they are held for sale or determined to be impaired. See “ Note 4. Restructuring and Other Costs ” for impairments associated with restructuring activities. Given the nature of nonfinancial assets and liabilities, evaluating their fair value from the perspective of a market participant is inherently complex. Assumptions and estimates about future values can be affected by a variety of internal and external factors. Changes in these factors may require us to revise our estimates and could result in future impairment charges for goodwill and acquired intangible assets, or retroactively adjust provisional amounts that we have recorded for the fair values of assets and liabilities in connection with business combinations. These adjustments could have a material impact on our financial condition and results of operations. We discuss fair values in more detail in “ Note 12. Fair Value ”. Derivatives We are exposed to interest rate risk, commodity price risk and foreign currency exchange risk. To manage these risks, from time to time and to varying degrees, we may enter into a variety of financial derivative transactions and certain physical commodity transactions that are determined to be derivatives. Interest rate swaps may be entered into to manage the interest rate risk associated with a portion of our outstanding debt. Interest rate swaps are either designated for accounting purposes as cash flow hedges of forecasted floating interest payments on variable rate debt or fair value hedges of fixed rate debt, or we may elect not to treat them as accounting hedges. Swaps or forward contracts on certain commodities may be entered into to manage the price risk associated with forecasted purchases or sales of those commodities. In addition, certain commodity financial derivative contracts and physical commodity contracts that are determined to be derivatives may not be designated as accounting hedges because either they do not meet the criteria for treatment as accounting hedges under ASC 815, “ Derivatives and Hedging Outstanding financial derivative instruments expose us to credit loss in the event of nonperformance by the counterparties to the derivative agreements. Our credit exposure related to these financial instruments is represented by the fair value of contracts reported as assets. We manage our exposure to counterparty credit risk through minimum credit standards, diversification of counterparties and procedures to monitor concentrations of credit risk. We may enter into financial derivative contracts that may contain credit-risk-related contingent features which could result in a counterparty requesting immediate payment or demanding immediate and ongoing full overnight collateralization on derivative instruments in net liability positions. For financial derivative instruments that are designated as a cash flow hedge for accounting purposes, the entire change in fair value of the financial derivative instrument is reported as a component of other comprehensive income and reclassified into earnings in the same line item associated with the forecasted transaction, and in the same period or periods during which the forecasted transaction affects earnings. We have at times entered into interest rate swap agreements that effectively modified our exposure to interest rate risk by converting a portion of our interest payments on floating rate debt to a fixed rate basis, thus reducing the impact of interest rate changes on future interest expense. These agreements typically involved the receipt of floating rate amounts in exchange for fixed interest rate payments over the life of the agreements without an exchange of the underlying principal amount. At September 30, 2021, the notional amount of foreign currency exchange contract derivative was $270.2 million. The fair value of this derivative instrument was not significant as of September 30, 2021. At September 30, 2020, the notional amounts of interest rate and foreign currency exchange contract derivatives were $600.0 million and $250.2 million, respectively. The fair value of these derivative instruments was not significant as of September 30, 2020. See “ Note 13. Debt Health Insurance We are self-insured for the majority of our group health insurance costs. However, we seek to limit our health insurance costs by entering into certain stop loss insurance coverage. Due to mergers, acquisitions and other factors, we may have plans that do not include stop loss insurance. We calculate our group health insurance reserve on an undiscounted basis based on estimated reserve rates. We utilize claims lag data provided by our claims administrators to compute the required estimated reserve rate. We calculate our average monthly claims paid using the actual monthly payments during the trailing 12-month period. At that time, we also calculate our required reserve using the reserve rates discussed above. While we believe that our assumptions are appropriate, significant differences in our actual experience or significant changes in our assumptions may materially affect our group health insurance costs. Workers’ Compensation We purchase large risk deductible workers’ compensation policies for the majority of our workers’ compensation liabilities that are subject to various deductibles to limit our exposure. We calculate our workers’ compensation reserves on an undiscounted basis based on estimated actuarially calculated development factors. While we believe that our assumptions are appropriate, significant differences in our actual experience or significant changes in our assumptions may materially affect our workers' compensation costs. Income Taxes We account for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, deferred tax assets and liabilities are determined based on the differences between the fina |
