Quarterly report [Sections 13 or 15(d)]

Outstanding Loans and Leases and Allowance for Credit Losses - Home Equity - Credit Quality Indicators Including Vintage (Details)

v3.25.1
Outstanding Loans and Leases and Allowance for Credit Losses - Home Equity - Credit Quality Indicators Including Vintage (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases $ 1,110,625   $ 1,095,835
Total gross charge-offs 1,733 $ 1,738  
Consumer real estate      
Financing Receivable, Credit Quality Indicator [Line Items]      
Total gross charge-offs 6 $ 11  
Consumer real estate | Home equity      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 25,666   25,737
Total gross charge-offs 3   21
Consumer real estate | Home equity | Less than 620      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 665   645
Consumer real estate | Home equity | Greater than or equal to 620 and less than 660      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 604   577
Consumer real estate | Home equity | Greater than or equal to 660 and less than 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 4,849   4,911
Consumer real estate | Home equity | Greater than or equal to 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 19,548   19,604
Consumer real estate | Home Equity Loans and Reverse Mortgages      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 764   787
Total gross charge-offs 0   6
Consumer real estate | Home Equity Loans and Reverse Mortgages | Less than 620      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 71   72
Consumer real estate | Home Equity Loans and Reverse Mortgages | Greater than or equal to 620 and less than 660      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 46   46
Consumer real estate | Home Equity Loans and Reverse Mortgages | Greater than or equal to 660 and less than 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 190   198
Consumer real estate | Home Equity Loans and Reverse Mortgages | Greater than or equal to 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 457   471
Consumer real estate | Reverse Mortgages      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 488   500
Consumer real estate | Home Equity Loan no Longer Originated      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 276   287
Consumer real estate | Revolving Loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 21,579   21,526
Gross charge-offs, Revolving Loans 2   9
Consumer real estate | Revolving Loans | Less than 620      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 341   320
Consumer real estate | Revolving Loans | Greater than or equal to 620 and less than 660      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 366   339
Consumer real estate | Revolving Loans | Greater than or equal to 660 and less than 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 3,774   3,779
Consumer real estate | Revolving Loans | Greater than or equal to 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 17,098   17,088
Consumer real estate | Revolving Loans Converted to Term Loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans Converted to Term Loans 3,323   3,424
Gross charge-offs, Revolving Loans Converted to Term Loans 1   6
Consumer real estate | Revolving Loans Converted to Term Loans | Less than 620      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans Converted to Term Loans 253   253
Consumer real estate | Revolving Loans Converted to Term Loans | Greater than or equal to 620 and less than 660      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans Converted to Term Loans 192   192
Consumer real estate | Revolving Loans Converted to Term Loans | Greater than or equal to 660 and less than 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans Converted to Term Loans 885   934
Consumer real estate | Revolving Loans Converted to Term Loans | Greater than or equal to 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans Converted to Term Loans 1,993   2,045
Less than or equal to 90 percent | Consumer real estate | Home equity      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 25,542   25,638
Less than or equal to 90 percent | Consumer real estate | Home Equity Loans and Reverse Mortgages      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 755   780
Less than or equal to 90 percent | Consumer real estate | Revolving Loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 21,480   21,450
Less than or equal to 90 percent | Consumer real estate | Revolving Loans Converted to Term Loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans Converted to Term Loans 3,307   3,408
Greater than 90 percent but less than or equal to 100 percent | Consumer real estate | Home equity      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 67   51
Greater than 90 percent but less than or equal to 100 percent | Consumer real estate | Home Equity Loans and Reverse Mortgages      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 6   4
Greater than 90 percent but less than or equal to 100 percent | Consumer real estate | Revolving Loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 56   42
Greater than 90 percent but less than or equal to 100 percent | Consumer real estate | Revolving Loans Converted to Term Loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans Converted to Term Loans 5   5
Greater than 100 percent | Consumer real estate | Home equity      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 57   48
Greater than 100 percent | Consumer real estate | Home Equity Loans and Reverse Mortgages      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 3   3
Greater than 100 percent | Consumer real estate | Revolving Loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 43   34
Greater than 100 percent | Consumer real estate | Revolving Loans Converted to Term Loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans Converted to Term Loans $ 11   $ 11