CONDENSED CONSOLIDATED BALANCE SHEETS PARENTHETICAL - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Share-Based Payment Arrangement, Recognized Amount [Abstract]
Available for Sale at Fair value - Amortized cost	$ 89,709	$ 82,907
Preferred stock par value (per share)	$ 10,000.00
Common stock par value (per share)	$ 10,000.00	$ 10,000.00
Common stock shares authorized	140,000,000,000,000	140,000,000,000,000
Common Stock, Shares, Issued	85,310,598,000,000	85,310,598,000,000
Allowance for Loan and Lease Losses, Real Estate	$ 89	$ 93
Financing Receivable, Allowance for Credit Loss	$ 103	$ 98
Preferred stock shares authorized	10,000,000,000,000
Treasury Stock, Common, Shares	19,224,837,000,000	19,438,336,000,000