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Retirement Benefits (Amounts Recorded in the Consolidated Statements of Income) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Compensation and benefits expense | $ (4,280) | $ (4,312) | $ (3,066)
Other net benefit (credit) cost | (235) | (277) | (257)
Pension Benefits |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Compensation and benefits expense | 28 | 38 | 36
Other net benefit (credit) cost | (237) | (278) | (258)
Net benefit (credit) cost | (209) | (240) | (222)
Post-retirement Benefits |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Compensation and benefits expense | 0 | 1 | 0
Other net benefit (credit) cost | 2 | 1 | 1
Net benefit (credit) cost | $ 2 | $ 2 | $ 1

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