Investment Securities (Details) $ in Millions |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
|
Sep. 30, 2026
USD ($)
loan
|
Sep. 30, 2026
USD ($)
loan
|
Sep. 30, 2025
USD ($)
|
|
| Investments, Debt and Equity Securities [Abstract] | |||
| Available-for-sale securities scheduled to contractually mature after five years through ten years | $ 400 | $ 400 | |
| Available-for-sale securities scheduled to contractually mature after ten years | $ 1,200 | $ 1,200 | |
| Gross unrealized losses, number of positions | loan | 142 | 142 | |
| Deconsolidation Of Investments | $ 0 | $ 1,500 | |
| Investment Securities Acquired and PC Debt Issued via Non-Cash Transaction | $ 1,500 | $ 0 | |
| Non-mortgage-related securities sold but not settled | $ (1,000) | ||
| X | ||||||||||
- Definition Deconsolidation Of Investments No definition available.
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| X | ||||||||||
- Definition Investment securities recognized in exchange for the issuance of PC debt through partial sales of commingled single-class securities. No definition available.
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| X | ||||||||||
- Definition Non-mortgage-related securities sold but not settled No definition available.
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| X | ||||||||||
- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after rolling tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in rolling sixth through tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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| X | ||||||||||
- References No definition available.
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