v3.26.1
Investment Securities - Gross Unrealized Losses and Fair Value of Investment Securities (Details)
$ in Millions
Jun. 30, 2026
USD ($)
Schedule Of Fair Value And Gross Unrealized Losses [Line Items]  
Less Than 12 Months, Fair Value $ 16,088
Less Than 12 Months, Unrealized Losses (146)
12 Months or Greater, Fair Value 40,128
12 Months or Greater, Unrealized Losses (4,506)
Total, Fair Value 56,216
Total, Unrealized Losses (4,652)
U.S. Treasury and agencies  
Schedule Of Fair Value And Gross Unrealized Losses [Line Items]  
Less Than 12 Months, Fair Value 2,507
Less Than 12 Months, Unrealized Losses (30)
12 Months or Greater, Fair Value 14,636
12 Months or Greater, Unrealized Losses (1,358)
Total, Fair Value 17,143
Total, Unrealized Losses (1,388)
Residential mortgage-backed securities  
Schedule Of Fair Value And Gross Unrealized Losses [Line Items]  
Less Than 12 Months, Fair Value 10,982
Less Than 12 Months, Unrealized Losses (105)
12 Months or Greater, Fair Value 12,353
12 Months or Greater, Unrealized Losses (1,361)
Total, Fair Value 23,335
Total, Unrealized Losses (1,466)
Commercial mortgage-backed securities | Agency  
Schedule Of Fair Value And Gross Unrealized Losses [Line Items]  
Less Than 12 Months, Fair Value 0
Less Than 12 Months, Unrealized Losses 0
12 Months or Greater, Fair Value 7,423
12 Months or Greater, Unrealized Losses (984)
Total, Fair Value 7,423
Total, Unrealized Losses (984)
Commercial mortgage-backed securities | Non-agency  
Schedule Of Fair Value And Gross Unrealized Losses [Line Items]  
Less Than 12 Months, Fair Value 0
Less Than 12 Months, Unrealized Losses 0
12 Months or Greater, Fair Value 7
12 Months or Greater, Unrealized Losses 0
Total, Fair Value 7
Total, Unrealized Losses 0
Asset-backed securities  
Schedule Of Fair Value And Gross Unrealized Losses [Line Items]  
Less Than 12 Months, Fair Value 1,524
Less Than 12 Months, Unrealized Losses (1)
12 Months or Greater, Fair Value 0
12 Months or Greater, Unrealized Losses 0
Total, Fair Value 1,524
Total, Unrealized Losses (1)
Obligations of state and political subdivisions  
Schedule Of Fair Value And Gross Unrealized Losses [Line Items]  
Less Than 12 Months, Fair Value 1,075
Less Than 12 Months, Unrealized Losses (10)
12 Months or Greater, Fair Value 5,709
12 Months or Greater, Unrealized Losses (803)
Total, Fair Value 6,784
Total, Unrealized Losses $ (813)