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Investments - Scheduled maturities for fixed Income securities (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Amortized cost, net |  |
Due in one year or less | $ 3,092 |
Due after one year through five years | 24,271 |
Due after five years through ten years | 22,000 |
Due after ten years | 10,757 |
Subtotal | 60,120 |
ABS and MBS | 1,331 |
Amortized cost, net | 61,451 | $ 56,293
Fair value |  |
Due in one year or less | 3,136 |
Due after one year through five years | 25,587 |
Due after five years through ten years | 24,018 |
Due after ten years | 12,265 |
Subtotal | 65,006 |
ABS and MBS | 1,348 |
Fair value | $ 66,354 | $ 59,044

X
- Definition This item represents the total of all debt securities grouped by maturity dates excluding asset-backed securities, residential mortgage-backed securities and commercial mortgage-backed securities, at cost, net of adjustments made for accretion, amortization, other-than-temporary impairments, and hedging, if any, which are classified neither as held-to-maturity nor trading securities. + References No definition available. + Details
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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). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 + Details
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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 next rolling 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. + References No definition available. + 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 next rolling 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. + References No definition available. + Details
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