Fair Values (Details Textual) - Fair Value, Measurements, Nonrecurring - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of equity securities without readily determinable fair values	$ 1,000,000,000	$ 1,300,000,000
Net upward adjustments of equity securities without readily determinable fair values	94,000,000	729,000,000	$ 113,000,000
Net downward adjustments of equity securities without readily determinable fair values	388,000,000	2,000,000	$ 20,000,000
Cumulative net unrealized gains for equity investments without readily determinable fair values	1,200,000,000	1,100,000,000
Cumulative net unrealized losses for equity investments without readily determinable fair values	394,000,000	10,000,000
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	$ 600,000,000	$ 0