Fair Value of Assets and Liabilities (Unobservable inputs) (Details 4) $ in Millions		Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gross fair value of embedded derivative liabilities	[1],[2]	$ 1,851	$ 3,381
Ameriprise Financial [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities, fair value		35,832	36,283
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Corporate debt securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities, fair value		$ 812	$ 772
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Corporate debt securities [Member] | Minimum [Member] | Yield/spread to U.S. Treasuries [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs		0.009	0.010
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Corporate debt securities [Member] | Maximum [Member] | Yield/spread to U.S. Treasuries [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs		0.029	0.033
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Corporate debt securities [Member] | Weighted average [Member] | Yield/spread to U.S. Treasuries [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs	[3]	0.013	0.015
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities, fair value		$ 1	$ 3
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Annual short-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs		0.055
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Annual long-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs		0.040
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Discount rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs		0.130	0.130
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Constant prepayment rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs		0.100	0.100
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Loss recovery [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs		0.636	0.636
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Minimum [Member] | Annual short-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs			0.029
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Minimum [Member] | Annual long-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs			0.035
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Maximum [Member] | Annual short-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs			0.030
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Maximum [Member] | Annual long-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs			0.045
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Weighted average [Member] | Annual short-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs	[4]	0.055	0.029
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Weighted average [Member] | Annual long-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs	[4]	0.040	0.038
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Weighted average [Member] | Discount rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs		0.130	0.130
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Weighted average [Member] | Constant prepayment rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs		0.100	0.100
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Asset-backed securities [Member] | Weighted average [Member] | Loss recovery [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Availabe-for-sale securities, measurement inputs		0.636	0.636
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | IUL embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gross fair value of embedded derivative liabilities		$ 949	$ 935
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | IUL embedded derivatives [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[5]	0.65	0.65
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | IUL embedded derivatives [Member] | Weighted average [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[5]	0.65	0.65
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Fixed deferred indexed annuity embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gross fair value of embedded derivative liabilities		$ 52	$ 49
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Fixed deferred indexed annuity embedded derivatives [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[5]	0.65	0.65
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Fixed deferred indexed annuity embedded derivatives [Member] | Minimum [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.000	0.000
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Fixed deferred indexed annuity embedded derivatives [Member] | Maximum [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.500	0.500
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Fixed deferred indexed annuity embedded derivatives [Member] | Weighted average [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[6]	0.016	0.012
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Fixed deferred indexed annuity embedded derivatives [Member] | Weighted average [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[5]	0.65	0.65
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | GMWB and GMAB embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gross fair value of embedded derivative liabilities		$ 715	$ 2,316
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | GMWB and GMAB embedded derivatives [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[5]	0.65	0.65
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | GMWB and GMAB embedded derivatives [Member] | Minimum [Member] | Utilization of guaranteed withdrawals [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[7]	0.000	0.000
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | GMWB and GMAB embedded derivatives [Member] | Minimum [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.001	0.001
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | GMWB and GMAB embedded derivatives [Member] | Minimum [Member] | Market volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[8]	0.042	0.043
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | GMWB and GMAB embedded derivatives [Member] | Maximum [Member] | Utilization of guaranteed withdrawals [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[7]	0.480	0.480
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | GMWB and GMAB embedded derivatives [Member] | Maximum [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.735	0.735
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | GMWB and GMAB embedded derivatives [Member] | Maximum [Member] | Market volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[8]	0.170	0.171
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | GMWB and GMAB embedded derivatives [Member] | Weighted average [Member] | Utilization of guaranteed withdrawals [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[7],[9]	0.106	0.106
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | GMWB and GMAB embedded derivatives [Member] | Weighted average [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[6]	0.039	0.038
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | GMWB and GMAB embedded derivatives [Member] | Weighted average [Member] | Market volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[8],[10]	0.108	0.110
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | GMWB and GMAB embedded derivatives [Member] | Weighted average [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[5]	0.65	0.65
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Structured annuity embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gross fair value of embedded derivative liabilities		$ 124	$ 70
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Structured annuity embedded derivatives [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[5]	0.65	0.65
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Structured annuity embedded derivatives [Member] | Minimum [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.008	0.008
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Structured annuity embedded derivatives [Member] | Maximum [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.400	0.400
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Structured annuity embedded derivatives [Member] | Weighted average [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[6]	0.009	0.009
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Structured annuity embedded derivatives [Member] | Weighted average [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input	[5]	0.65	0.65
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Contingent consideration liabilities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities, fair value		$ 43	$ 43
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Contingent consideration liabilities [Member] | Minimum [Member] | Discount rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities, measurement input		0.00%	0.00%
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Contingent consideration liabilities [Member] | Maximum [Member] | Discount rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities, measurement input		9.00%	9.00%
Ameriprise Financial [Member] | Level 3 [Member] | Discounted cash flow [Member] | Contingent consideration liabilities [Member] | Weighted average [Member] | Discount rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities, measurement input	[11]	3.20%	3.10%

[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 $2.2 billion and $3.7 billion as of March 31, 2021 and December 31, 2020, respectively. See Note 12 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 nonperformance risk is the spread added to the observable interest rates used in the valuation of the embedded derivatives.

[6] 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.

[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.