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Investment Securities - Contractual Maturities (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Cost |  |
Due within 1 year | $ 867 |
Due after 1 year but within 5 years | 285 |
Due after 5 years but within 10 years | 32 |
Due after 10 years | 49 |
Total | 1,233 |
Estimated Fair Value |  |
Due within 1 year | 867 |
Due after 1 year but within 5 years | 284 |
Due after 5 years but within 10 years | 33 |
Due after 10 years | 41 |
Total | $ 1,225 | $ 2,120

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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 second through fifth 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 (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 + Details
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