Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Amortized Cost	$ 28,602	$ 27,370
Available-for-sale securities at fair value, pledged as collateral	530	61
Allowance for credit loss	6	7
Held-to-maturities, fair value	$ 76,169	$ 97,227
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	383,500	383,500
Preferred stock, shares outstanding	383,500	383,500
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares, issued	59,171,883	58,748,469
Common stock, shares outstanding	59,171,883	58,748,469