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Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Policies [Abstract] |
Schedule of Cash and Cash Equivalents | CASH, CASH EQUIVALENTS AND RESTRICTED CASH We consider all highly liquid instruments with maturities of three months or less to be cash equivalents. Cash that is held by a third party and has restrictions on its availability to us is classified as restricted cash. The following table provides a reconciliation of cash, cash equivalents and restricted cash reported on the balance sheet that sum to the total of those same amounts shown in our Consolidated Statements of Cash Flows.
| December 31,
(In millions) | 2020 |  | 2019 |  | 2018
Cash and cash equivalents | $ | 35.9 |  |  | $ | 20.0 |  |  | $ | 22.5 |
Restricted cash | — |  |  | 1.4 |  |  | — |
Restricted cash included in Other assets, net | 1.1 |  |  | 1.0 |  |  | 2.4 |
Total cash, cash equivalents and restricted cash | $ | 36.9 |  |  | $ | 22.4 |  |  | $ | 24.9 |
Schedule of Accounts, Notes, Loans and Financing Receivable | ACCOUNTS RECEIVABLE Receivables consist of:
| December 31,
(in millions) | 2020 |  | 2019
Trade accounts receivable | $ | 139.0 |  |  | $ | 149.6 |
Allowance for current expected credit losses | (1.6) |  |  | (1.5) |
Unbilled receivables | 5.1 |  |  | 7.4 |
Taxes receivable | 16.0 |  |  | 0.3 |
Interest receivable | — |  |  | 1.0 |
Other | 2.1 |  |  | 2.6 |
| $ | 160.6 |  |  | $ | 159.4 |
Schedule of Inventory, Current | INVENTORIES Our inventories are stated at the lower of net realizable value or current cost using the average cost method.
|  | December 31,
(In millions) |  | 2020 |  | 2019
Logs, chips and sawdust |  | $ | 17.2 |  |  | $ | 19.4 |
Pulp |  | 11.5 |  |  | 20.1 |
Paperboard and tissue products |  | 137.0 |  |  | 148.7 |
Materials and supplies |  | 97.7 |  |  | 93.1 |
|  | $ | 263.3 |  |  | $ | 281.4 |
Property, Plant and Equipment | PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment are stated at cost, including assets acquired under finance lease obligations, and any interest costs capitalized, less accumulated depreciation. Depreciation of buildings, equipment and other depreciable assets is determined using the straight-line method. Estimated useful lives generally range from 10 to 40 years for land improvements, 10 to 40 years for buildings and improvements and 2 to 25 years for machinery and equipment (includes office and other equipment).
|  | December 31,
(In millions) |  | 2020 |  | 2019
Land and land improvements |  | $ | 111.5 |  |  | $ | 109.9 |
Buildings and improvements |  | 480.1 |  |  | 478.7 |
Machinery and equipment |  | 2,459.2 |  |  | 2,441.7 |
Construction in progress |  | 21.8 |  |  | 9.2 |
|  | 3,072.6 |  |  | 3,039.5 |
Less accumulated depreciation and amortization |  | (1,881.1) |  |  | (1,781.8) |
Property, plant and equipment, net |  | $ | 1,191.5 |  |  | $ | 1,257.7 |
Schedule of Asset Retirement Obligations | The following table represents the activity associated with our asset retirement obligations for the years ended December 31, 2020 and December 31, 2019,
|  | December 31,
(In millions) |  | 2020 |  | 2019
Beginning balance |  | $ | 1.1 |  |  | $ | 0.4 |
Accretion expense |  | 0.1 |  | 0.0
Adjusted to expense during the year |  | 0.1 |  | 0.1
Adjusted to other operating charges, net |  | 2.5 |  | 0.6
Payments made |  | — |  |  | — |
Ending balance |  | $ | 3.8 |  |  | $ | 1.1 |

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