Investments (Narrative) (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
Dec. 31, 2024 |
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| Investments, Debt and Securities [Line Items] | |||||
| Impairment of equity method investment | $ 0 | $ 0 | $ 0 | $ 0 | |
| Net income (losses) from unconsolidated investees | 24,000,000 | $ 1,000,000 | 73,000,000 | $ 7,000,000 | |
| Fair value, recurring | |||||
| Investments, Debt and Securities [Line Items] | |||||
| Securities with readily determinable fair value | $ 49,000,000 | $ 49,000,000 | |||
| OCC | |||||
| Investments, Debt and Securities [Line Items] | |||||
| Equity method investment, ownership percentage | 40.00% | 40.00% | 40.00% | ||
| Foreign government debt securities | |||||
| Investments, Debt and Securities [Line Items] | |||||
| Trading securities | $ 43,000,000 | $ 43,000,000 | $ 171,000,000 | ||
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- Definition Investments, Debt and Securities [Line Items] No definition available.
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- Definition Amount of other-than-temporary decline in value that has been recognized against investment accounted for under equity method of accounting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of income (loss) for proportionate share of equity method investee's income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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