v3.25.2
Retirement Benefits (Defined Benefit Plan Net Periodic Benefit Cost Amounts Recorded in Consolidated Statement of Income) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Defined Benefit Plan Disclosure [Line Items]        
Compensation and benefits expense $ (1,829) $ (1,642) $ (3,834) $ (3,567)
Other net benefit credits (48) (66) (91) (133)
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Compensation and benefits expense 7 6 13 12
Other net benefit credits (47) (64) (91) (131)
Net benefit credit (40) $ (58) $ (78) $ (119)
Postretirement Benefit Costs        
Defined Benefit Plan Disclosure [Line Items]        
Other net benefit credits $ 1