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Employee Incentive Plans (2007 Stock Incentive Plan, ROI Summary) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Distributed [1] $ 67 $ 85 $ 53
Stock Incentive Plan Granted Shares Adjustment 7,725 7,725  
2007 Stock Incentive Plan (Shares)      
Beginning Balance 4,783,810 4,974,355 5,127,915
Shares Granted 1,425,272 1,084,773 [2] 1,229,177
Shares Canceled (179,856) (55,177) (82,496)
Shares Distributed (1,276,186) (1,220,141) (1,300,241)
Ending Balance 4,753,040 4,783,810 4,974,355
[1] Intrinsic value of SIP units distributed represents the compensation value reported to the participants.
[2] Stock Incentive Plan number of granted restricted stock units related to 2021 was adjusted by 7,725 additional restricted stock units during the year ended December 31, 2022.