Fair Values (Details Textual) - Fair Value, Nonrecurring - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
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		$ 1,000,000,000
Net upward adjustments of equity securities without readily determinable fair values	0	$ 76,000,000	0	$ 88,000,000
Net downward adjustments of equity securities without readily determinable fair values	10,000,000	$ 84,000,000	105,000,000	$ 102,000,000
Cumulative net unrealized gains for equity investments without readily determinable fair values	1,200,000,000		1,200,000,000		1,200,000,000
Cumulative net unrealized losses for equity investments without readily determinable fair values	504,000,000		504,000,000		394,000,000
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		$ 0		$ 600,000,000