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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Allowance for doubtful accounts |  |  |
Valuation and qualifying accounts |  |  |
Balance at Beginning of Period | $ 44 | $ 904 | $ 867
Charged to Costs and Expenses | 98 | (235) | 37
Charged to Other Accounts | (1) | 0 | 0
Deductions | 1 | (625) | 0
Balance at End of Period | 142 | 44 | 904
Valuation allowance and reserves, current | 58 | 43 | 44
Environmental, litigation, tax and other reserves |  |  |
Valuation and qualifying accounts |  |  |
Balance at Beginning of Period | 3,793 | 3,712 | 3,164
Charged to Costs and Expenses | 869 | 328 | 714
Charged to Other Accounts | 142 | 50 | 138
Deductions | (542) | (297) | (304)
Balance at End of Period | 4,262 | 3,793 | 3,712
Environmental litigation tax and other reserves, current | $ 226 | $ 215 | $ 266

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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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