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INVESTMENTS - Fair Value of AFS Debt Securities by Contractual Maturity Date (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair value |  |
Total fair value | $ 246,227 | $ 226,876
Unallocated portfolio layer cumulative basis adjustments |  | (72)
Mortgage-backed securities |  |
Amoritzed cost |  |
Amortized cost, due within 1 year | 7 |
Amortized cost, after 1 but within 5 years | 1,229 |
Amortized cost, after 5 but within 10 years | 684 |
Amortized cost, after 10 years | 35,122 |
Amortized cost | 37,042 |
Fair value |  |
Fair value, due within 1 year | 7 |
Fair value, after 1 but within 5 years | 1,225 |
Fair value, after 5 but within 10 years | 670 |
Fair value, after 10 years | 34,746 |
Total fair value | 36,648 | 29,931
U.S. Treasury and federal agency securities |  |
Amoritzed cost |  |
Amortized cost, due within 1 year | 19,042 |
Amortized cost, after 1 but within 5 years | 17,777 |
Amortized cost, after 5 but within 10 years | 244 |
Amortized cost, after 10 years | 0 |
Amortized cost | 37,063 |
Fair value |  |
Fair value, due within 1 year | 18,990 |
Fair value, after 1 but within 5 years | 17,803 |
Fair value, after 5 but within 10 years | 225 |
Fair value, after 10 years | 0 |
Total fair value | 37,018 | 52,379
State and municipal |  |
Amoritzed cost |  |
Amortized cost, due within 1 year | 72 |
Amortized cost, after 1 but within 5 years | 98 |
Amortized cost, after 5 but within 10 years | 382 |
Amortized cost, after 10 years | 1,206 |
Amortized cost | 1,758 |
Fair value |  |
Fair value, due within 1 year | 72 |
Fair value, after 1 but within 5 years | 94 |
Fair value, after 5 but within 10 years | 375 |
Fair value, after 10 years | 1,150 |
Total fair value | 1,691 | 1,658
Foreign government |  |
Amoritzed cost |  |
Amortized cost, due within 1 year | 69,045 |
Amortized cost, after 1 but within 5 years | 87,276 |
Amortized cost, after 5 but within 10 years | 4,297 |
Amortized cost, after 10 years | 581 |
Amortized cost | 161,199 |
Fair value |  |
Fair value, due within 1 year | 68,935 |
Fair value, after 1 but within 5 years | 87,919 |
Fair value, after 5 but within 10 years | 4,264 |
Fair value, after 10 years | 523 |
Total fair value | 161,641 | 133,359
All other |  |
Amoritzed cost |  |
Amortized cost, due within 1 year | 4,064 |
Amortized cost, after 1 but within 5 years | 4,592 |
Amortized cost, after 5 but within 10 years | 561 |
Amortized cost, after 10 years | 49 |
Amortized cost | 9,266 |
Fair value |  |
Fair value, due within 1 year | 4,057 |
Fair value, after 1 but within 5 years | 4,580 |
Fair value, after 5 but within 10 years | 564 |
Fair value, after 10 years | 28 |
Total fair value | 9,229 |
Debt securities AFS |  |
Amoritzed cost |  |
Amortized cost | 246,328 |
Fair value |  |
Total fair value | 246,227 | 226,876
Unallocated portfolio layer cumulative basis adjustments | $ 300 | $ (200)

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- Definition Amortized cost 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 sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 + Details
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- 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 sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 320 -Name Accounting Standards Codification -Section 50 -Paragraph 3A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477268/942-320-50-3A + Details
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