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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Employee Termination Benefits |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Beginning balance | $ 11 | $ 43 | $ 470
Additions (reductions) charged to expense | (2) | 1 | (30)
Payments/ reductions | (3) | (33) | (397)
Ending balance | 6 | 11 | 43
Expected Credit Losses |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Beginning balance | 1,008 | 745 | 671
Current period provision | (367) | 263 | 74
Additions (reductions) charged to expense | 0 | 0 | 0
Ending balance | 641 | 1,008 | 745
Deferred Income Tax Valuation Allowance |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Beginning balance | 19,532 | 17,651 | 17,762
Additions (reductions) charged to expense | 2,348 | 3,533 | 3,691
Payments/ reductions | (1,464) | (1,652) | (3,802)
Ending balance | $ 20,416 | $ 19,532 | $ 17,651

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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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