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Investments - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract] |  |  |
Allowance for credit loss, available-for-sale debt securities | $ 0 | $ 0 |
Debt securities in an unrealized loss position | 777,000,000 | 748,000,000 |
Debt securities, unrealized loss | 16,000,000 | 19,000,000 |
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | 283,000,000 | 92,000,000 |
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer | 14,000,000 | 13,000,000 |
Realized loss on marketable equity securities |  |  | $ 13,000,000
Equity securities without readily determinable fair value, carrying value | 83,000,000 | 75,000,000 |
Impairment of investments | 0 | 0 | 3,000,000
Downward adjustment | 0 | 0 |
Upward adjustment | 4,000,000 | 0 | 0
Cumulative impairment of investments | 56,000,000 |  |
Carrying value of equity method investments | 8,000,000 | 14,000,000 |
Loss from equity method investments | 6,000,000 | 5,000,000 | 4,000,000
Impairment in equity method investments | $ 0 | $ 0 | $ 0

X
- Definition Amount excluding accrued interest, of allowance for credit loss on 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 -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + Details
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
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