Investments - Narrative (Details) - USD ($)	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Available-for-sale debt securities	$ 0	$ 0
Debt securities in an unrealized loss position	1,100,000,000	777,000,000
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss	269,000,000	283,000,000
Equity securities without readily determinable fair value, carrying value	38,000,000	83,000,000
Impairment of investments	45,000,000	0	$ 0
Downward adjustment		0	0
Upward adjustment	0	0	0
Cumulative impairment of investments	101,000,000
Carrying value of equity method investments	47,000,000	8,000,000
Impairment in equity method investments	$ 0	$ 0	$ 0

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).

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-Topic 326
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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.

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Amount of investment in debt security 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.

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Amount of other-than-temporary decline in value that has been recognized against investment accounted for under equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of investment in equity security without readily determinable fair value.

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Amount of loss from downward price adjustment on investment in equity security without readily determinable fair value.

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Amount of impairment loss on investment in equity security without readily determinable fair value.

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Amount of cumulative impairment loss on investment in equity security without readily determinable fair value.

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Amount of gain from upward price adjustment on investment in equity security without readily determinable fair value.

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