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Nature of Operations and Basis of Presentation (Policies) | 3 Months Ended
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Mar. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Basis of Accounting and Presentation | The consolidated financial statements of PCA as of March 31, 2021 and for the three months ended March 31, 2021 and 2020 are unaudited but include all adjustments (consisting only of normal recurring adjustments) that management considers necessary for a fair presentation of such financial statementsThese financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and with Article 10 of Regulation S-X of the Securities and Exchange Commission (SEC). Accordingly, they do not include all of the information and notes required by accounting principles generally accepted in the United States for complete audited financial statements. Operating results for the three months ended March 31, 2021 are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. These consolidated financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2020.
Use of Estimates | The preparation of the consolidated financial statements involves the use of estimates and accruals. Actual results may vary from those estimates.
Revenue Recognition | Revenue Recognition Revenue is recognized when control of the promised goods or services is transferred to customers in an amount that reflects the consideration expected to be received in exchange for those goods or services. Sales, value added, and other taxes collected concurrently with revenue-producing activities are excluded from revenue. The following table presents our revenues disaggregated by product line (dollars in millions):
|  | Three Months Ended March 31, |
|  | 2021 |  |  | 2020 |
Packaging |  | $ | 1,623.6 |  |  | $ | 1,467.5 |
Paper |  |  | 164.6 |  |  |  | 217.4 |
Corporate and Other |  |  | 19.0 |  |  |  | 23.8 |
Total revenue |  | $ | 1,807.2 |  |  | $ | 1,708.7 |
Inventory Valuation | We value our raw materials, work in process, and finished goods inventories using lower of cost, as determined by the average cost method, or net realizable value. Supplies and materials are valued at the first-in, first-out (FIFO) or average cost methods.

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