Fair Value of Assets and Liabilities - Significant Unobservable inputs (Details) $ in Millions		Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Significant unobservable inputs used in fair value measurements
Fair Value, embedded derivatives, net	[1],[2]	$ 2,633	$ 3,381
Ameriprise Financial
Significant unobservable inputs used in fair value measurements
Available-for-Sale: Fixed maturities, at fair value		30,114	36,283
Ameriprise Financial | Corporate debt securities
Significant unobservable inputs used in fair value measurements
Available-for-Sale: Fixed maturities, at fair value		9,725	13,674
Ameriprise Financial | Asset backed securities
Significant unobservable inputs used in fair value measurements
Available-for-Sale: Fixed maturities, at fair value		3,495	3,329
Ameriprise Financial | Level 3 | Corporate debt securities
Significant unobservable inputs used in fair value measurements
Available-for-Sale: Fixed maturities, at fair value		520	772
Ameriprise Financial | Level 3 | Fixed Deferred Indexed Annuity Ceded Embedded Derivatives
Significant unobservable inputs used in fair value measurements
Receivables: embedded derivatives		56
Ameriprise Financial | Level 3 | IUL embedded derivatives
Significant unobservable inputs used in fair value measurements
Gross Fair Value Liabilities, embedded derivatives		917	935
Ameriprise Financial | Level 3 | Fixed deferred indexed annuity embedded derivatives
Significant unobservable inputs used in fair value measurements
Gross Fair Value Liabilities, embedded derivatives		54	49
Ameriprise Financial | Level 3 | GMWB and GMAB embedded derivatives
Significant unobservable inputs used in fair value measurements
Fair Value, embedded derivatives, net		1,436	2,316
Ameriprise Financial | Level 3 | Structured variable annuity embedded derivatives
Significant unobservable inputs used in fair value measurements
Gross Fair Value Liabilities, embedded derivatives		217	70
Ameriprise Financial | Level 3 | Contingent consideration liabilities
Significant unobservable inputs used in fair value measurements
Other liabilities, fair value		$ 40	$ 43
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
Availabe-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
Availabe-for-sale securities, measurement inputs		0.024	0.033
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
Availabe-for-sale securities, measurement inputs	[3]	0.012	0.015
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities
Significant unobservable inputs used in fair value measurements
Available-for-Sale: Fixed maturities, at fair value		$ 2	$ 3
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Annual short-term default rate
Significant unobservable inputs used in fair value measurements
Availabe-for-sale securities, measurement inputs		0.014
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Annual long-term default rate
Significant unobservable inputs used in fair value measurements
Availabe-for-sale securities, measurement inputs		0.035
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Discount rate
Significant unobservable inputs used in fair value measurements
Availabe-for-sale securities, measurement inputs		0.120	0.130
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Constant prepayment rate
Significant unobservable inputs used in fair value measurements
Availabe-for-sale securities, measurement inputs		0.100	0.100
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Loss recovery
Significant unobservable inputs used in fair value measurements
Availabe-for-sale securities, measurement inputs		0.636	0.636
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Minimum | Annual short-term default rate
Significant unobservable inputs used in fair value measurements
Availabe-for-sale securities, measurement inputs			0.029
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Minimum | Annual long-term default rate
Significant unobservable inputs used in fair value measurements
Availabe-for-sale securities, measurement inputs			0.035
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Maximum | Annual short-term default rate
Significant unobservable inputs used in fair value measurements
Availabe-for-sale securities, measurement inputs			0.030
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Maximum | Annual long-term default rate
Significant unobservable inputs used in fair value measurements
Availabe-for-sale securities, measurement inputs			0.045
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
Availabe-for-sale securities, measurement inputs	[4]	0.014	0.029
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
Availabe-for-sale securities, measurement inputs	[4]	0.035	0.038
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Weighted Average | Discount rate
Significant unobservable inputs used in fair value measurements
Availabe-for-sale securities, measurement inputs		0.120	0.130
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Weighted Average | Constant prepayment rate
Significant unobservable inputs used in fair value measurements
Availabe-for-sale securities, measurement inputs		0.100	0.100
Ameriprise Financial | Level 3 | Discounted cash flow | Asset backed securities | Weighted Average | Loss recovery
Significant unobservable inputs used in fair value measurements
Availabe-for-sale securities, measurement inputs		0.636	0.636
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed Deferred Indexed Annuity Ceded Embedded Derivatives | Minimum | Surrender rate
Significant unobservable inputs used in fair value measurements
Embedded derivative asset, measurement input		0.000
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed Deferred Indexed Annuity Ceded Embedded Derivatives | Maximum | Surrender rate
Significant unobservable inputs used in fair value measurements
Embedded derivative asset, measurement input		0.668
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed Deferred Indexed Annuity Ceded Embedded Derivatives | Weighted Average | Surrender rate
Significant unobservable inputs used in fair value measurements
Embedded derivative asset, measurement input	[5]	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	[6]	0.60	0.65
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	[6]	0.60	0.65
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed deferred indexed annuity embedded derivatives | Nonperformance risk
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input	[6]	0.60	0.65
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed deferred indexed annuity 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 annuity embedded derivatives | Maximum | Surrender rate
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input		0.668	0.500
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed deferred indexed annuity embedded derivatives | Weighted Average | Surrender rate
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input	[5]	0.014	0.012
Ameriprise Financial | Level 3 | Discounted cash flow | Fixed deferred indexed annuity embedded derivatives | Weighted Average | Nonperformance risk
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input	[6]	0.60	0.65
Ameriprise Financial | Level 3 | Discounted cash flow | GMWB and GMAB embedded derivatives | Nonperformance risk
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input	[6]	0.60	0.65
Ameriprise Financial | Level 3 | Discounted cash flow | GMWB and GMAB embedded derivatives | Minimum | Utilization of guaranteed withdrawals
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input	[7]	0.000	0.000
Ameriprise Financial | Level 3 | Discounted cash flow | GMWB and GMAB embedded derivatives | Minimum | Surrender rate
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input		0.001	0.001
Ameriprise Financial | Level 3 | Discounted cash flow | GMWB and GMAB embedded derivatives | Minimum | Market volatility
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input	[8]	0.044	0.043
Ameriprise Financial | Level 3 | Discounted cash flow | GMWB and GMAB embedded derivatives | Maximum | Utilization of guaranteed withdrawals
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input	[7]	0.480	0.480
Ameriprise Financial | Level 3 | Discounted cash flow | GMWB and GMAB embedded derivatives | Maximum | Surrender rate
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input		0.634	0.735
Ameriprise Financial | Level 3 | Discounted cash flow | GMWB and GMAB embedded derivatives | Maximum | Market volatility
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input	[8]	0.176	0.171
Ameriprise Financial | Level 3 | Discounted cash flow | GMWB and GMAB embedded derivatives | Weighted Average | Utilization of guaranteed withdrawals
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input	[7],[9]	0.106	0.106
Ameriprise Financial | Level 3 | Discounted cash flow | GMWB and GMAB embedded derivatives | Weighted Average | Surrender rate
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input	[5]	0.036	0.038
Ameriprise Financial | Level 3 | Discounted cash flow | GMWB and GMAB embedded derivatives | Weighted Average | Market volatility
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input	[8],[10]	0.113	0.110
Ameriprise Financial | Level 3 | Discounted cash flow | GMWB and GMAB embedded derivatives | Weighted Average | Nonperformance risk
Significant unobservable inputs used in fair value measurements
Embedded derivative liability, measurement input	[6]	0.60	0.65
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	[6]	0.60	0.65
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		0.008	0.008
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		0.400	0.400
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	[5]	0.009	0.009
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	[6]	0.60	0.65
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		0.090	0.090
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	[11]	0.024	0.031

[1] The fair value of freestanding derivative liabilities is included in Other liabilities on the Consolidated Balance Sheets. The fair value of GMWB and GMAB, IUL, fixed deferred indexed annuity and structured variable annuity embedded derivatives is included in Policyholder account balances, future policy benefits and claims on the Consolidated Balance Sheets. The fair value of the SMC embedded derivative liability is included in Customer deposits on the Consolidated Balance Sheets.

[2] The fair value of the Company’s derivative liabilities after considering the effects of master netting arrangements, cash collateral held by the same counterparty and the fair value of net embedded derivatives was $2.9 billion and $3.7 billion as of September 30, 2021 and December 31, 2020, respectively. See Note 13 for additional information related to master netting arrangements and cash collateral.

[3] The weighted average for the spread to U.S. Treasuries for corporate debt securities (private placements) is weighted based on the security’s market value as a percentage of the aggregate market value of the securities.

[4] The weighted average annual default rates of asset backed securities is weighted based on the security’s market value as a percentage of the aggregate market value of the securities.

[5] The weighted average surrender rate is weighted based on the benefit base of each contract and represents the average assumption in the current year including the effect of a dynamic surrender formula.

[6] The nonperformance risk is the spread added to the observable interest rates used in the valuation of the embedded derivatives.

[7] The utilization of guaranteed withdrawals represents the percentage of contractholders that will begin withdrawing in any given year.

[8] Market volatility is implied volatility of fund of funds and managed volatility funds.

[9] The weighted average utilization rate represents the average assumption for the current year, weighting each policy evenly. The calculation excludes policies that have already started taking withdrawals.

[10] The weighted average market volatility represents the average volatility across all contracts, weighted by the size of the guaranteed benefit.

[11] The weighted average discount rate represents the average discount rate across all contingent consideration liabilities, weighted based on the size of the contingent consideration liability.