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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Compensation and benefits expense (Operating income) | $ (885) | $ (680) | $ (1,955) | $ (1,618)
Other net benefit (credits) cost | (63) | (70) | (127) | (134)
Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Compensation and benefits expense (Operating income) | 9 | 10 | 17 | 18
Other net benefit (credits) cost | (63) | (70) | (127) | (134)
Total (credit) cost | (54) | (60) | (110) | (116)
Post-retirement Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Compensation and benefits expense (Operating income) | 0 | 0 | 0 | 0
Other net benefit (credits) cost | 0 | 0 | 0 | 0
Total (credit) cost | $ 0 | $ 0 | $ 0 | $ 0

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