CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt securities amortized costs	$ 50,834	$ 52,611
Debt securities allowance for credit losses	0	0
Unamortized balance of loan origination fees	$ 4	$ 4
Class A common stock, par value	$ 0.001	$ 0.001
Class A common stock, shares authorized	1,500	1,500
Class A common stock, shares issued	600	596
Class A common stock, shares outstanding	495	508
Treasury stock, shares	105	88