Summary of Significant Accounting Policies (Allowance for Doubtful Accounts) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
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| Accounts Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Accounts Receivable, Allowance for Credit Loss, Beginning Balance | $ 64 | $ 81 | $ 72 |
| Provision for/(recovery of) doubtful accounts | 3 | (2) | 21 |
| Accounts Receivable, Allowance for Credit Loss, Writeoff | (7) | (15) | (12) |
| Accounts Receivable, Allowance for Credit Loss, Ending Balance | $ 60 | $ 64 | $ 81 |
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- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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| X | ||||||||||
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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