Fair Values (Details Textual) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of equity securities without readily determinable fair values	$ 900	$ 1,000
Net upward adjustments of equity securities without readily determinable fair values	18	94	$ 729
Net downward adjustments of equity securities without readily determinable fair values	142	388	$ 2
Cumulative net unrealized gains for equity investments without readily determinable fair values	1,100	1,200
Cumulative net unrealized losses for equity investments without readily determinable fair values	431	394
Fair Value, Inputs, 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	$ 600