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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Valuation and Qualifying Accounts |  |  |
Balance at beginning of period | $ 191 | $ 123 | $ 100
Additions Charged to Costs and Expenses | 137 | 94 | 51
Deductions | 41 | 26 | 28
Balance at end of period | 287 | 191 | 123
Valuation allowance for deferred tax assets |  |  |
Valuation and Qualifying Accounts |  |  |
Balance at beginning of period | 153 | 90 | 73
Additions Charged to Costs and Expenses | 126 | 69 | 30
Deductions | 41 | 6 | 13
Balance at end of period | 238 | 153 | 90
Allowance for obsolete inventory parts |  |  |
Valuation and Qualifying Accounts |  |  |
Balance at beginning of period | 35 | 29 | 24
Additions Charged to Costs and Expenses | 8 | 6 | 5
Deductions | 0 | 0 | 0
Balance at end of period | 43 | 35 | 29
Allowance for credit losses |  |  |
Valuation and Qualifying Accounts |  |  |
Balance at beginning of period | 3 | 4 | 3
Additions Charged to Costs and Expenses | 3 | 19 | 16
Deductions | 0 | 20 | 15
Balance at end of period | $ 6 | $ 3 | $ 4

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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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- Definition Amount of decrease in 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 D)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-4 + Details
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