Fair Values (Details Textual) - Fair Value, Nonrecurring - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	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	$ 1,300		$ 1,300		$ 1,300
Net upward adjustments of equity securities without readily determinable fair values	76	$ 249	88	$ 627
Net downward adjustments of equity securities without readily determinable fair values	84	$ 1	102	$ 2
Cumulative net unrealized gains for equity investments without readily determinable fair values	1,200		1,200		1,100
Cumulative net unrealized losses for equity investments without readily determinable fair values	$ 112		$ 112		$ 10