Debt Investments (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Proceeds from sales of available-for-sale securities			$ 220	$ 1,291
Gross realized gains			5	19
Available-for-sale Securities, Gross Realized Losses			(5)	(12)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	$ 120		120
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	113		113
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	1,151		1,151
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	1,058		1,058
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	407		407
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	403		403
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost	544		544
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	447		447
Debt Securities, Available-for-sale, Amortized Cost	2,222		2,222
Debt Securities, Available-for-sale	2,021		2,021
Equity Securities, Net Unrealized Gain (Loss)	(1)	$ 0	(2)	$ 0
Equity Securities, FV-NI, Current	12		12		$ 14
Equity Securities without Readily Determinable Fair Value, Amount	$ 145		$ 145		$ 153

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