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, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Compensation and benefits expense	$ (996)	$ (791)	$ (4,179)	$ (3,600)
Other net benefit credits	(62)	(57)	(180)	(178)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Compensation and benefits expense	7	6	18	21
Other net benefit credits	(62)	(58)	(180)	(180)
Net benefit credit	$ (55)	$ (52)	$ (162)	$ (159)