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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Compensation and benefits expense (Operating income)	$ (1,364)	$ (1,228)	$ (2,809)	$ (2,586)
Other net benefit (credits) cost	(59)	(71)	(121)	(142)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Compensation and benefits expense (Operating income)	7	10	15	20
Other net benefit (credits) cost	(59)	(72)	(122)	(143)
Total credit	$ (52)	$ (62)	$ (107)	$ (123)