Fair Values (Details Textual) - Fair Value, Nonrecurring - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of equity securities without readily determinable fair values	$ 900		$ 900
Net upward adjustments of equity securities without readily determinable fair values	0	$ 0
Net downward adjustments of equity securities without readily determinable fair values	0	$ 95
Cumulative net unrealized gains for equity investments without readily determinable fair values	1,100		1,100
Cumulative net unrealized losses for equity investments without readily determinable fair values	$ 431		431
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