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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, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Compensation and benefits expense (Operating income) | $ (740) | $ (540) | $ (3,326) | $ (2,495)
Other net benefit (credits) cost | (69) | (60) | (211) | (187)
Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Compensation and benefits expense (Operating income) | 9 | 10 | 29 | 27
Other net benefit (credits) cost | (69) | (60) | (212) | (187)
Total credit | $ (60) | $ (50) | $ (183) | $ (160)

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