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Fair Values of Assets and Liabilities - Significant Unobservable inputs (Details)
$ in Millions
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Significant unobservable inputs used in fair value measurements    
Liabilities embedded derivatives, net $ (3,523) $ (1,945)
Ameriprise Financial    
Significant unobservable inputs used in fair value measurements    
Available-for-Sale securities, at fair value 52,153 51,562
Ameriprise Financial | Corporate debt securities    
Significant unobservable inputs used in fair value measurements    
Available-for-Sale securities, at fair value 13,999 12,576
Ameriprise Financial | Asset backed securities    
Significant unobservable inputs used in fair value measurements    
Available-for-Sale securities, at fair value 6,442 8,319
Ameriprise Financial | Level 3 | Corporate debt securities    
Significant unobservable inputs used in fair value measurements    
Available-for-Sale securities, at fair value 583 469
Ameriprise Financial | Level 3 | Asset backed securities    
Significant unobservable inputs used in fair value measurements    
Available-for-Sale securities, at fair value 1 1
Ameriprise Financial | Level 3 | Fixed deferred indexed annuities ceded embedded derivatives    
Significant unobservable inputs used in fair value measurements    
Receivables: embedded derivatives 55 51
Ameriprise Financial | Level 3 | IUL embedded derivatives    
Significant unobservable inputs used in fair value measurements    
Liabilities embedded derivatives 1,002 873
Ameriprise Financial | Level 3 | Fixed deferred indexed annuities embedded derivatives    
Significant unobservable inputs used in fair value measurements    
Liabilities embedded derivatives 53 49
Ameriprise Financial | Level 3 | Structured variable annuity embedded derivatives    
Significant unobservable inputs used in fair value measurements    
Liabilities embedded derivatives, net 2,461 1,011
Ameriprise Financial | Level 3 | Contingent consideration liabilities    
Significant unobservable inputs used in fair value measurements    
Contingent consideration liabilities, fair value $ 68 $ 76
Ameriprise Financial | Level 3 | Discounted cash flow | Corporate debt securities | Minimum | Yield/spread to U.S. Treasuries    
Significant unobservable inputs used in fair value measurements    
Available-for-sale securities, measurement inputs 0.008 0.010
Ameriprise Financial | Level 3 | Discounted cash flow | Corporate debt securities | Maximum | Yield/spread to U.S. Treasuries    
Significant unobservable inputs used in fair value measurements    
Available-for-sale securities, measurement inputs 0.017 0.024
Ameriprise Financial | Level 3 | Discounted cash flow | Corporate debt securities | Weighted Average | Yield/spread to U.S. Treasuries    
Significant unobservable inputs used in fair value measurements    
Available-for-sale securities, measurement inputs 0.011 0.012
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Annual short-term default rate    
Significant unobservable inputs used in fair value measurements    
Available-for-sale securities, measurement inputs 0.035 0.030
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Annual long-term default rate    
Significant unobservable inputs used in fair value measurements    
Available-for-sale securities, measurement inputs 0.035 0.035
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Discount rate    
Significant unobservable inputs used in fair value measurements    
Available-for-sale securities, measurement inputs 0.153 0.290
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Constant prepayment rate    
Significant unobservable inputs used in fair value measurements    
Available-for-sale securities, measurement inputs 0.200 0.100
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Loss recovery    
Significant unobservable inputs used in fair value measurements    
Available-for-sale securities, measurement inputs 0.600 0.636
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Weighted Average | Annual short-term default rate    
Significant unobservable inputs used in fair value measurements    
Available-for-sale securities, measurement inputs 0.035 0.030
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Weighted Average | Annual long-term default rate    
Significant unobservable inputs used in fair value measurements    
Available-for-sale securities, measurement inputs 0.035 0.035
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Weighted Average | Discount rate    
Significant unobservable inputs used in fair value measurements    
Available-for-sale securities, measurement inputs 0.153 0.290
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Weighted Average | Constant prepayment rate    
Significant unobservable inputs used in fair value measurements    
Available-for-sale securities, measurement inputs 0.200 0.100
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Weighted Average | Loss recovery    
Significant unobservable inputs used in fair value measurements    
Available-for-sale securities, measurement inputs 0.600 0.636
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed deferred indexed annuities ceded embedded derivatives | Minimum | Surrender rate    
Significant unobservable inputs used in fair value measurements    
Embedded derivative asset, measurement input 0.000 0.000
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed deferred indexed annuities ceded embedded derivatives | Maximum | Surrender rate    
Significant unobservable inputs used in fair value measurements    
Embedded derivative asset, measurement input 0.891 0.668
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed deferred indexed annuities ceded embedded derivatives | Weighted Average | Surrender rate    
Significant unobservable inputs used in fair value measurements    
Embedded derivative asset, measurement input 0.106 0.014
Ameriprise Financial | Level 3 | Discounted cash flow | IUL embedded derivatives | Nonperformance risk    
Significant unobservable inputs used in fair value measurements    
Embedded derivative liability, measurement input 0.0065 0.0085
Ameriprise Financial | Level 3 | Discounted cash flow | IUL embedded derivatives | Weighted Average | Nonperformance risk    
Significant unobservable inputs used in fair value measurements    
Embedded derivative liability, measurement input 0.0065 0.0085
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed deferred indexed annuities embedded derivatives | Nonperformance risk    
Significant unobservable inputs used in fair value measurements    
Embedded derivative liability, measurement input 0.0065 0.0085
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed deferred indexed annuities embedded derivatives | Minimum | Surrender rate    
Significant unobservable inputs used in fair value measurements    
Embedded derivative liability, measurement input 0.000 0.000
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed deferred indexed annuities embedded derivatives | Maximum | Surrender rate    
Significant unobservable inputs used in fair value measurements    
Embedded derivative liability, measurement input 0.891 0.668
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed deferred indexed annuities embedded derivatives | Weighted Average | Surrender rate    
Significant unobservable inputs used in fair value measurements    
Embedded derivative liability, measurement input 0.106 0.014
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed deferred indexed annuities embedded derivatives | Weighted Average | Nonperformance risk    
Significant unobservable inputs used in fair value measurements    
Embedded derivative liability, measurement input 0.0065 0.0085
Ameriprise Financial | Level 3 | Discounted cash flow | Structured variable annuity embedded derivatives | Nonperformance risk    
Significant unobservable inputs used in fair value measurements    
Embedded derivative liability, measurement input 0.0065 0.0085
Ameriprise Financial | Level 3 | Discounted cash flow | Structured variable annuity embedded derivatives | Minimum | Surrender rate    
Significant unobservable inputs used in fair value measurements    
Embedded derivative liability, measurement input 0.005 0.005
Ameriprise Financial | Level 3 | Discounted cash flow | Structured variable annuity embedded derivatives | Maximum | Surrender rate    
Significant unobservable inputs used in fair value measurements    
Embedded derivative liability, measurement input 0.750 0.750
Ameriprise Financial | Level 3 | Discounted cash flow | Structured variable annuity embedded derivatives | Weighted Average | Surrender rate    
Significant unobservable inputs used in fair value measurements    
Embedded derivative liability, measurement input 0.017 0.026
Ameriprise Financial | Level 3 | Discounted cash flow | Structured variable annuity embedded derivatives | Weighted Average | Nonperformance risk    
Significant unobservable inputs used in fair value measurements    
Embedded derivative liability, measurement input 0.0065 0.0085
Ameriprise Financial | Level 3 | Discounted cash flow | Contingent consideration liabilities | Minimum | Discount rate    
Significant unobservable inputs used in fair value measurements    
Contingent consideration liabilities, measurement input 0.000 0.000
Ameriprise Financial | Level 3 | Discounted cash flow | Contingent consideration liabilities | Maximum | Discount rate    
Significant unobservable inputs used in fair value measurements    
Contingent consideration liabilities, measurement input 0.105 0.105
Ameriprise Financial | Level 3 | Discounted cash flow | Contingent consideration liabilities | Weighted Average | Discount rate    
Significant unobservable inputs used in fair value measurements    
Contingent consideration liabilities, measurement input 0.033 0.029