Fair Values of Assets and Liabilities - Significant Unobservable inputs (Details) $ in Millions	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Significant unobservable inputs used in fair value measurements
Liabilities: embedded derivatives, net	$ 2,573	$ 1,945
Ameriprise Financial
Significant unobservable inputs used in fair value measurements
Available-for-Sale securities, at fair value	52,246	51,562
Ameriprise Financial | Corporate debt securities
Significant unobservable inputs used in fair value measurements
Available-for-Sale securities, at fair value	12,854	12,576
Ameriprise Financial | Asset backed securities
Significant unobservable inputs used in fair value measurements
Available-for-Sale securities, at fair value	8,156	8,319
Ameriprise Financial | Level 3 | Corporate debt securities
Significant unobservable inputs used in fair value measurements
Available-for-Sale securities, at fair value	505	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	54	51
Ameriprise Financial | Level 3 | Fixed deferred indexed annuities embedded derivatives
Significant unobservable inputs used in fair value measurements
Liabilities: embedded derivatives	52	49
Ameriprise Financial | Level 3 | IUL embedded derivatives
Significant unobservable inputs used in fair value measurements
Liabilities: embedded derivatives	888	873
Ameriprise Financial | Level 3 | Structured variable annuity embedded derivatives
Significant unobservable inputs used in fair value measurements
Liabilities: embedded derivatives, net	1,620	1,011
Ameriprise Financial | Level 3 | Contingent consideration liabilities
Significant unobservable inputs used in fair value measurements
Other liabilities, fair value	$ 71	$ 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	0.009	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	0.023	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	0.013	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	0.040	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	0.270	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	0.120	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	0.550	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	0.040	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	0.270	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	0.120	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	0.550	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	0.668	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	0.014	0.014
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	0.0075	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	0.668	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	0.014	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	0.0075	0.0085
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	0.0075	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	0.0075	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	0.0075	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	0.026	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	0.0075	0.0085
Ameriprise Financial | Level 3 | Discounted cash flow | Contingent consideration liabilities | Minimum | Discount rate
Significant unobservable inputs used in fair value measurements
Other 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
Other 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
Other liabilities, measurement input	0.029	0.029