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		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Compensation and benefits expense	$ (791)	$ (740)	$ (3,600)	$ (3,326)
Other net benefit credit	(57)	(69)	(178)	(211)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Compensation and benefits expense	6	9	21	29
Other net benefit credit	(58)	(69)	(180)	(212)
Net benefit credit	$ (52)	$ (60)	$ (159)	$ (183)