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Retirement and Deferred Compensation Plans (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Retirement and Deferred Compensation Plans [Abstract] |  |  |
Net periodic benefit expense (recovery) | $ (41) | $ (11) | $ 8
Expected benefit payments in the next fiscal year | 110 |  |
Defined contribution plans expense | 107 | 100 | 104
Deferred compensation plans expense | $ 32 | $ 35 | $ 28

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