Investments (Narrative) (Details) - USD ($) |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
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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 | 21,000,000 | 23,000,000 | 47,000,000 | 50,000,000 | |
| Fair value, recurring | |||||
| Investments, Debt and Securities [Line Items] | |||||
| Equity securities not have readily determinable fair value | 17,000,000 | 0 | 17,000,000 | 0 | |
| Gains and losses from equity securities | $ 0 | $ 0 | $ (15,000,000) | $ 0 | |
| OCC | |||||
| Investments, Debt and Securities [Line Items] | |||||
| Equity method investment, ownership percentage | 40.00% | 40.00% | 40.00% | 40.00% | |
| Foreign government debt securities | |||||
| Investments, Debt and Securities [Line Items] | |||||
| Trading securities | $ 163,000,000 | $ 163,000,000 | $ 18,000,000 | ||
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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 unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of gain from upward price adjustment on investment in equity security without readily determinable fair value. 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://www.xbrl.org/2003/role/disclosureRef
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