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Schedule II Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2020
Valuation And Qualifying Accounts [Abstract] |
Schedule II - Valuation and Qualifying Accounts | SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS Year Ended December 31,
(In millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  | Additions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description |  | Balance at beginning of period |  |  | Charged (credited) to income |  |  | Charged (credited) to AOCL |  |  | Deductions from reserves |  |  |  | Translation adjustment during period |  |  | Balance at end of period |
|  |  |  |  |  | 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 126 |  | (a) | $ | 30 |  |  | $ | - |  |  | $ | (11 | ) | (b) |  | $ | 5 |  |  | $ | 150 |
Valuation allowance — deferred tax assets |  |  | 982 |  |  |  | 488 |  |  |  | (1 | ) |  |  | - |  |  |  |  | - |  |  |  | 1,469 |
|  |  |  |  |  | 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 113 |  |  | $ | 13 |  |  | $ | - |  |  | $ | (14 | ) | (b) |  | $ | (1 | ) |  | $ | 111 |
Valuation allowance — deferred tax assets |  |  | 317 |  |  |  | 661 |  |  |  | 4 |  |  |  | - |  |  |  |  | - |  |  |  | 982 |
|  |  |  |  |  | 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 116 |  |  | $ | 21 |  |  | $ | - |  |  | $ | (19 | ) | (b) |  | $ | (5 | ) |  | $ | 113 |
Valuation allowance — deferred tax assets |  |  | 318 |  |  |  | 18 |  |  |  | (1 | ) |  |  | - |  |  |  |  | (18 | ) |  |  | 317 |
(a) | Effective January 1, 2020, we adopted, using the modified retrospective adoption approach, an accounting standards update with new guidance relating to credit losses on financial instruments. Our adoption of this standards update resulted in a cumulative effect adjustment to decrease Retained Earnings by $12 million, with Accounts Receivables decreasing by $15 million and Deferred Income Taxes increasing by $3 million. Periods prior to 2020 have not been restated for the adoption of this standards update.
(b) | Accounts receivable charged off.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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