CONDENSED CONSOLIDATED BALANCE SHEETS PARENTHETICAL - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Available for Sale at Fair value - Amortized cost	$ 57,849	$ 55,873
Preferred stock par value (per share)	$ 0.01
Common stock par value (per share)	$ 0.01	$ 0.01
Common stock shares authorized	140,000,000	140,000,000
Common Stock, Shares, Issued	85,310,598	85,310,598
Treasury stock, shares	18,322,345	18,139,868
Allowance for Loan and Lease Losses, Real Estate	$ 37	$ 35
Financing Receivable, Allowance for Credit Loss	$ 42	$ 31
Preferred stock shares authorized	10,000,000
Preferred stock shares authorized	10,000,000