Fair Value of Financial Instruments - Carrying Values and Fair Values of Other Financial Instruments (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Carrying value | ||
| Derivative [Line Items] | ||
| Available-for-sale securities | $ 17 | $ 18 |
| Held-to-maturity investments | 3 | 5 |
| Long-term debt, less long-term debt due within one year | 4,052 | 2,859 |
| Fair value | Level 1 | ||
| Derivative [Line Items] | ||
| Available-for-sale securities | 17 | 18 |
| Fair value | Level 2 | ||
| Derivative [Line Items] | ||
| Held-to-maturity investments | 3 | 5 |
| Long-term debt, less long-term debt due within one year | $ 3,894 | $ 2,919 |
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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