Fair Values (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net upward adjustments of equity securities without readily determinable fair values	$ 0	$ 0
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of equity securities without readily determinable fair values	900,000,000		$ 900,000,000
Net downward adjustments of equity securities without readily determinable fair values	39,000,000	$ 0
Cumulative net unrealized gains for equity investments without readily determinable fair values	1,100,000,000		1,100,000,000
Cumulative net unrealized losses for equity investments without readily determinable fair values	499,000,000		460,000,000
Fair Value, Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of equity securities without readily determinable fair values	$ 0		$ 1,000,000