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Employee Incentive Plans (2007 Stock Incentive Plan, ROI Summary) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Employee Incentive Plans [Abstract] |  |  |  |
Beginning Balance | [1] | 4,605,071 | 4,756,761 | 4,783,810
Shares Granted | [1] | 617,122 | 1,257,822 | 1,428,994
Shares Canceled | [1] | (43,021) | (20,480) | (179,856)
Shares Distributed | [1] | (1,349,131) | (1,389,032) | (1,276,186)
Ending Balance | [1] | 3,830,041 | 4,605,071 | 4,756,761
Distributed | [2] | $ 161 | $ 108 | $ 67
Stock Incentive Plan Granted Shares Adjustment |  | 952 |  |
[1] | Stock Incentive Plan number of granted restricted stock units related to 2023 was adjusted by 952 additional restricted stock units during the year ended December 31, 2024.
[2] | Intrinsic value of SIP units distributed represents the compensation value reported to the participants.

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