Retirement Benefits (Schedule Of 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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Compensation and benefits expense	$ (1,457)	$ (1,364)	$ (3,183)	$ (2,809)
Other net benefit credits	(60)	(59)	(118)	(121)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Compensation and benefits expense	5	7	11	15
Other net benefit credits	(60)	(59)	(118)	(122)
Net benefit credit	$ (55)	$ (52)	$ (107)	$ (107)