Investments in Debt and Equity Securities (Details 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Schedule of Investments in Debt and Equity Securities
Due in one year or less, Cost Basis	$ 696		$ 696
Due in one year or less, Fair Value	687		687
Due after one year through five years, Cost Basis	1,354		1,354
Due after one year through five years, Fair Value	1,277		1,277
Due after five through ten years, Cost Basis	282		282
Due after five years through ten years, Fair Value	256		256
Due after ten years, Cost Basis	70		70
Due after ten years, Fair Value	67		67
Debt Securities, Available-for-sale, Amortized Cost	2,928		2,928		$ 1,694
Debt securities, Available-for-sale, Fair value	2,767		2,767		1,721
Available-for-sale Securities, Proceeds, Gains and Losses
Proceeds from the sale of available-for-sale securities	204	$ 97	474	$ 322
Gross gains from the sale of available-for-sale securities	0	1	1	3
Gross losses from the sale of available-for-sale securities	0	0	1	0
Schedule of Held-to-maturity Securities
Unrealized gain (loss) on equity securities	(12)	$ 46	(97)	$ 65
Bank Time Deposits
Schedule of Held-to-maturity Securities
Time deposit	0		0		964
U.S. governmental agency mortgage-backed securities
Schedule of Investments in Debt and Equity Securities
Debt Securities, Available-for-sale, Amortized Cost	384		384		319
Debt securities, Available-for-sale, Fair value	348		348		325
Residential
Schedule of Investments in Debt and Equity Securities
Debt Securities, Available-for-sale, Amortized Cost	3		3		4
Debt securities, Available-for-sale, Fair value	3		3		4
Commercial
Schedule of Investments in Debt and Equity Securities
Debt Securities, Available-for-sale, Amortized Cost	139		139		98
Debt securities, Available-for-sale, Fair value	$ 129		$ 129		$ 99