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Share-Based Compensation - Deferred Compensation Plans and Cash Settle Awards (Details) - USD ($) shares in Thousands, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022
BMO Share Plans |  |
Deferred Compensation Plans |  |
Liability related to cash settle awards | $ 1 | $ 26
Compensation and commission deferrals | Ameriprise Financial Deferred Compensation Plan |  |
Deferred Compensation Plans |  |
Vesting period | 3 years |
Compensation and commission deferrals | Ameriprise Financial Franchise Advisor Deferral Plan |  |
Deferred Compensation Plans |  |
Maximum awards that may be granted | 12,500 |
Awards outstanding | 113 |
Compensation and commission deferrals | Ameriprise Financial Franchise Advisor Deferral Plan | Minimum |  |
Deferred Compensation Plans |  |
Vesting period | 3 years |
Compensation and commission deferrals | Ameriprise Financial Franchise Advisor Deferral Plan | Maximum |  |
Deferred Compensation Plans |  |
Vesting period | 4 years |
Compensation and commission deferrals | Ameriprise Advisor Group Deferred Compensation Plan |  |
Deferred Compensation Plans |  |
Maximum awards that may be granted | 3,000 |

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