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Valuation And Qualifying Accounts (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Valuation and allowance roll forward |  |  |
Beginning balance, January 1 | $ 48 | $ 69 |
Ending balance, December 31 | 36 | 48 | $ 69
Allowance for doubtful receivables |  |  |
Valuation and allowance roll forward |  |  |
Beginning balance, January 1 | 17 | 16 | 22
Additions charged to costs and expenses | 33 | 15 | 14
Deductions | (14) | (14) | (20)
Ending balance, December 31 | 36 | 17 | 16
Deferred tax valuation allowance |  |  |
Valuation and allowance roll forward |  |  |
Beginning balance, January 1 | 31 | 53 | 56
Additions charged to costs and expenses | 0 | 0 | 0
Deductions | (31) | (22) | (3)
Ending balance, December 31 | $ 0 | $ 31 | $ 53

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 + Details
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