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SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION | 9 Months Ended
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Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION | SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION Temporary Investments Temporary investments with an original maturity of three months or less and money market funds with greater than three-month maturities but with the right to redeem without notice are treated as cash equivalents and are stated at cost. Temporary investments totaled $7 million and $36 million as of September 30, 2021 and December 31, 2020, respectively. Accounts and Notes Receivable Accounts and notes receivable, net, by classification were:
In millions |  | September 30, 2021 |  | December 31, 2020
Accounts and notes receivable: |  |  |  |
Trade |  | $ | 401 |  |  | $ | 379 |
Notes |  | 1 |  |  | 2 |
Other |  | 20 |  |  | 19 |
Total |  | $ | 422 |  |  | $ | 400 |
The allowance for expected credit losses was $25 million and $30 million at September 30, 2021 and December 31, 2020, respectively. Based on the Company’s accounting estimates and the facts and circumstances available as of the reporting date, we believe our allowance for expected credit losses is adequate. Inventories
In millions | September 30, 2021 |  | December 31, 2020
Raw materials | $ | 44 |  |  | $ | 50 |
Finished paper and pulp products | 189 |  |  | 171 |
Operating supplies | 97 |  |  | 102 |
Other | 14 |  |  | 19 |
| $ | 344 |  |  | $ | 342 |
Plants, Properties and Equipment, Net Accumulated depreciation was $3.8 billion each at September 30, 2021 and December 31, 2020. Non-cash additions to plants, property and equipment included within accounts payable were $11 million each at September 30, 2021 and December 31, 2020.

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI http://asc.fasb.org/topic&trid=2122208 + Details
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