Investments in Debt and Equity Securities (Details 3) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Schedule of Investments in Debt and Equity Securities
Due in one year or less, Cost Basis	$ 508
Due in one year or less, Fair Value	507
Due after one year through five years, Cost Basis	1,369
Due after one year through five years, Fair Value	1,341
Due after five through ten years, Cost Basis	327
Due after five years through ten years, Fair Value	317
Due after ten years, Cost Basis	76
Due after ten years, Fair Value	75
Debt Securities, Available-for-sale, Amortized Cost	2,714		$ 1,694
Available-for-sale securities, debt securities	2,662		1,721
Available-for-sale Securities, Proceeds, Gains and Losses
Proceeds from the sale of available-for-sale securities	96	$ 100
Gross gains from the sale of available-for-sale securities	0	0
Gross losses from the sale of available-for-sale securities	0	0
Schedule of Held-to-maturity Securities
Debt Securities, Held-to-maturity, Unrealized Loss	0		0
Debt Securities, Held-to-maturity, Unrealized Gain	0		0
Unrealized gain (loss) on equity securities	(12)	$ 20
Bank Time Deposits
Schedule of Held-to-maturity Securities
Time deposit	813		964
U.S. governmental agency mortgage-backed securities
Schedule of Investments in Debt and Equity Securities
Debt Securities, Available-for-sale, Amortized Cost	328		319
Available-for-sale securities, debt securities	319		325
Residential
Schedule of Investments in Debt and Equity Securities
Debt Securities, Available-for-sale, Amortized Cost	3		4
Available-for-sale securities, debt securities	3		4
Commercial
Schedule of Investments in Debt and Equity Securities
Debt Securities, Available-for-sale, Amortized Cost	103		98
Available-for-sale securities, debt securities	$ 100		$ 99