v3.26.1
Guarantees - Carrying Value and Maximum Exposure to Loss (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Guarantor Obligations [Line Items]    
Carrying value of obligation $ 289 $ 263
Maximum exposure to loss, Expires in one year or less 146,746 118,441
Maximum exposure to loss, Expires after one year through three years 11,846 13,121
Maximum exposure to loss, Expires after three years through five years 7,469 5,922
Maximum exposure to loss, Expires after five years 9,023 8,144
Maximum exposure to loss 175,084 145,628
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss $ 175,084 145,628
Description of guarantees given by registrant The Parent fully and unconditionally guarantees the payment of principal, interest, and any other amounts that may be due on securities that its 100% owned finance subsidiary, Wells Fargo Finance LLC, may issue.  
Liabilities [1] $ 2,025,439 1,965,593
Written options [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 53,300 45,400
Guarantees Obligations Textual [Abstract]    
Carrying value of obligation (asset) 190 (101)
Maximum exposure for loss 53,300 45,400
Maximum exposure to loss, Expires in three years or less 50,300 42,000
Non-investment grade [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 19,958 19,692
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 19,958 19,692
Standby letters of credit [Member]    
Guarantor Obligations [Line Items]    
Carrying value of obligation 102 98
Maximum exposure to loss, Expires in one year or less 15,414 13,967
Maximum exposure to loss, Expires after one year through three years 5,306 6,550
Maximum exposure to loss, Expires after three years through five years 1,727 1,814
Maximum exposure to loss, Expires after five years 13 15
Maximum exposure to loss 22,460 22,346
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 22,460 22,346
Standby letters of credit [Member] | Non-investment grade [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 7,365 7,315
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 7,365 7,315
Direct pay letters of credit [Member]    
Guarantor Obligations [Line Items]    
Carrying value of obligation 4 5
Maximum exposure to loss, Expires in one year or less 552 588
Maximum exposure to loss, Expires after one year through three years 1,953 1,836
Maximum exposure to loss, Expires after three years through five years 633 353
Maximum exposure to loss, Expires after five years 87 88
Maximum exposure to loss 3,225 2,865
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 3,225 2,865
Direct pay letters of credit [Member] | Non-investment grade [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 567 488
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 567 488
Loans and LHFS sold with recourse [Member]    
Guarantor Obligations [Line Items]    
Carrying value of obligation 90 91
Maximum exposure to loss, Expires in one year or less 1,461 1,362
Maximum exposure to loss, Expires after one year through three years 3,392 3,214
Maximum exposure to loss, Expires after three years through five years 3,609 3,385
Maximum exposure to loss, Expires after five years 6,094 6,378
Maximum exposure to loss 14,556 14,339
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 14,556 14,339
Loans and LHFS sold with recourse [Member] | Non-investment grade [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 11,123 10,910
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 11,123 10,910
Exchange and clearing house guarantees [Member]    
Guarantor Obligations [Line Items]    
Carrying value of obligation 0 0
Maximum exposure to loss, Expires in one year or less 125,830 98,106
Maximum exposure to loss, Expires after one year through three years 0 0
Maximum exposure to loss, Expires after three years through five years 0 0
Maximum exposure to loss, Expires after five years 0 0
Maximum exposure to loss 125,830 98,106
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 125,830 98,106
Exchange and clearing house guarantees [Member] | Non-investment grade [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 0 0
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 0 0
Other guarantees and indemnifications [Member]    
Guarantor Obligations [Line Items]    
Carrying value of obligation 93 69
Maximum exposure to loss, Expires in one year or less 3,489 4,418
Maximum exposure to loss, Expires after one year through three years 1,195 1,521
Maximum exposure to loss, Expires after three years through five years 1,500 370
Maximum exposure to loss, Expires after five years 2,829 1,663
Maximum exposure to loss 9,013 7,972
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 9,013 7,972
Other guarantees and indemnifications [Member] | Non-investment grade [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 903 979
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 903 979
Other commitments and guarantees [Member] | Wells Fargo Finance, LLC [Member]    
Guarantees Obligations Textual [Abstract]    
Liabilities 2,100 $ 1,700
Credit and debit card [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 374,700  
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss $ 374,700  
[1] Our consolidated liabilities at March 31, 2026, and December 31, 2025, include the following VIE liabilities for which the VIE creditors do not have recourse to Wells Fargo: Long-term debt, $3.8 billion and $3.8 billion; Accrued expenses and other liabilities, $202 million and $206 million; and Total liabilities $4.0 billion and $4.0 billion, respectively.