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SEC Schedule, Article 12-09, Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2022
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure | Item 15. Exhibits, Financial Statements and Schedules. (A)(1) and (2) Financial Statements The consolidated financial statements of the registrants listed in the "Index to Financial Statements" on page F-1 together with the reports of PricewaterhouseCoopers LLP (PCAOB ID 238), independent auditors, are filed as part of this Annual Report. (A)(3) Exhibits See Index to Exhibits. The agreements included or incorporated by reference as exhibits to this Annual Report contain representations and warranties by each of the parties to the applicable agreement. These representations and warranties were made solely for the benefit of the other parties to the applicable agreement and (i) were not intended to be treated as categorical statements of fact, but rather as a way of allocating the risk to one of the parties if those statements prove to be inaccurate; (ii) may have been qualified in such agreement by disclosures that were made to the other party in connection with the negotiation of the applicable agreement; (iii) may apply contract standards of "materiality" that are different from "materiality" under the applicable securities laws; and (iv) were made only as of the date of the applicable agreement or such other date or dates as may be specified in the agreement. We acknowledge that, notwithstanding the inclusion of the foregoing cautionary statements, we are responsible for considering whether additional specific disclosures of material information regarding material contractual provisions are required to make the statements in this Annual Report not misleading. (A)(4) Consolidated Financial Statement Schedules Schedule II—Valuation and Qualifying Accounts for the years ended December 31, 2022, 2021 and 2020:
(in millions) |  |  | Additions |  |  |  |
Description | Balance at Beginning of Period |  | Charged to Costs and Expenses |  | Charged to Other Accounts |  | Deductions |  | Balance at End of Period
Allowance for doubtful accounts (a)
Year ended December 31, 2022 | $ | 11 |  |  | $ | 2 |  |  | $ | — |  |  | $ | (1) |  |  | $ | 12 |
Year ended December 31, 2021 | 13 |  |  | 2 |  |  | — |  |  | (4) |  |  | 11 |
Year ended December 31, 2020 | 11 |  |  | 9 |  |  | — |  |  | (7) |  |  | 13 |
Deferred tax asset valuation allowance
Year ended December 31, 2022 | $ | 20 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 20 |
Year ended December 31, 2021 | 21 |  |  | (1) |  |  | — |  |  | — |  |  | 20 |
Year ended December 31, 2020 | 17 |  |  | 4 |  |  | — |  |  | — |  |  | 21 |
_______________ (a)The deduction column represents uncollectible accounts written off, net of recoveries from Trade Receivables, in the Consolidated Balance Sheets.

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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 https://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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