Commitments (Other Commitments) (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Other Commitments [Line Items]
Commitments	$ 348,463	$ 326,159
Investments to quality for PAM	2,800	3,000
Commitments to extend credit
Other Commitments [Line Items]
Commitments	328,399	307,160
Commitments to extend credit \| Commercial
Other Commitments [Line Items]
Commitments	253,827	236,142
Commitments to extend credit \| Home equity
Other Commitments [Line Items]
Commitments	24,154	23,684
Commitments to extend credit \| Credit card
Other Commitments [Line Items]
Commitments	42,216	39,536
Commitments to extend credit \| Other
Other Commitments [Line Items]
Commitments	8,202	7,798
Standby letters of credit
Other Commitments [Line Items]
Commitments	12,483	11,452
Standby letters of credit \| Remarketing Programs
Other Commitments [Line Items]
Commitments	3,600	3,200
Standby bond purchase agreements
Other Commitments [Line Items]
Commitments	1,041	1,026
Other commitments
Other Commitments [Line Items]
Commitments	$ 6,540	$ 6,521