Fair Values (Details Textual) - Fair Value, Nonrecurring - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 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		$ 1,000,000,000
Net upward adjustments of equity securities without readily determinable fair values	0	$ 12,000,000
Net downward adjustments of equity securities without readily determinable fair values	95,000,000	$ 18,000,000
Cumulative net unrealized gains for equity investments without readily determinable fair values	1,200,000,000		1,200,000,000
Cumulative net unrealized losses for equity investments without readily determinable fair values	489,000,000		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	$ 200,000,000		$ 600,000,000