Fair Value of Assets and Liabilities (Unobservable inputs) (Details 4) - Ameriprise Financial [Member] - Level 3 [Member] - Discounted cash flow [Member] $ in Millions		Jun. 30, 2020 USD ($)		Dec. 31, 2019 USD ($)
Corporate debt securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate debt securities, Available-for-sale, fair value		$ 743		$ 749
Corporate debt securities [Member] | Minimum [Member] | Yield/spread to U.S. Treasuries [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate debt securities, Availabe-for-sale, measurement inputs		0.014		0.008
Corporate debt securities [Member] | Maximum [Member] | Yield/spread to U.S. Treasuries [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate debt securities, Availabe-for-sale, measurement inputs		0.053		0.028
Corporate debt securities [Member] | Weighted average [Member] | Yield/spread to U.S. Treasuries [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate debt securities, Availabe-for-sale, measurement inputs		0.022	[1]	0.012
Asset-backed securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, fair value		$ 2		$ 5
Asset-backed securities [Member] | Annual short-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs		0.085		0.033
Asset-backed securities [Member] | Annual long-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs				0.030
Asset-backed securities [Member] | Discount rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs		0.200		0.120
Asset-backed securities [Member] | Constant prepayment rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs		0.100
Asset-backed securities [Member] | Loss recovery [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs		0.636
Asset-backed securities [Member] | Minimum [Member] | Annual long-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs		0.035
Asset-backed securities [Member] | Minimum [Member] | Constant prepayment rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs				0.050
Asset-backed securities [Member] | Minimum [Member] | Loss recovery [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs				0.364
Asset-backed securities [Member] | Maximum [Member] | Annual long-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs		0.040
Asset-backed securities [Member] | Maximum [Member] | Constant prepayment rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs				0.100
Asset-backed securities [Member] | Maximum [Member] | Loss recovery [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs				0.636
Asset-backed securities [Member] | Weighted average [Member] | Annual short-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs		0.085
Asset-backed securities [Member] | Weighted average [Member] | Annual long-term default rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs	[2]	0.036
Asset-backed securities [Member] | Weighted average [Member] | Discount rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs		0.200
Asset-backed securities [Member] | Weighted average [Member] | Constant prepayment rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs		0.100		0.100
Asset-backed securities [Member] | Weighted average [Member] | Loss recovery [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset backed securities, measurement inputs		0.636		0.636
IUL embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, fair value		$ 882		$ 881
IUL embedded derivatives [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[3]	0.95		0.65
IUL embedded derivatives [Member] | Weighted average [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[3]	0.95
Fixed deferred indexed annuity embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, fair value		$ 41		$ 43
Fixed deferred indexed annuity embedded derivatives [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[3]	0.95		0.65
Fixed deferred indexed annuity embedded derivatives [Member] | Minimum [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs		0.000		0.000
Fixed deferred indexed annuity embedded derivatives [Member] | Maximum [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs		0.500		0.500
Fixed deferred indexed annuity embedded derivatives [Member] | Weighted average [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[3]	0.95
Fixed deferred indexed annuity embedded derivatives [Member] | Weighted average [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[4]	0.014
GMWB and GMAB embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, fair value		$ 3,129		$ 763
GMWB and GMAB embedded derivatives [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[3]	0.95		0.65
GMWB and GMAB embedded derivatives [Member] | Minimum [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs		0.001		0.001
GMWB and GMAB embedded derivatives [Member] | Minimum [Member] | Utilization of guaranteed withdrawals [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[5]	0.000		0.000
GMWB and GMAB embedded derivatives [Member] | Minimum [Member] | Market volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[6]	0.046		0.037
GMWB and GMAB embedded derivatives [Member] | Maximum [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs		0.735		0.735
GMWB and GMAB embedded derivatives [Member] | Maximum [Member] | Utilization of guaranteed withdrawals [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[5]	0.360		0.360
GMWB and GMAB embedded derivatives [Member] | Maximum [Member] | Market volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[6]	0.180		0.159
GMWB and GMAB embedded derivatives [Member] | Weighted average [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[3]	0.95
GMWB and GMAB embedded derivatives [Member] | Weighted average [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[4]	0.036
GMWB and GMAB embedded derivatives [Member] | Weighted average [Member] | Utilization of guaranteed withdrawals [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[5],[7]	0.110
GMWB and GMAB embedded derivatives [Member] | Weighted average [Member] | Market volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[6],[8]	0.119
Structured annuity embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, fair value		$ 9
Structured annuity embedded derivatives [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[3]	0.95
Structured annuity embedded derivatives [Member] | Minimum [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs		0.008
Structured annuity embedded derivatives [Member] | Maximum [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs		0.400
Structured annuity embedded derivatives [Member] | Weighted average [Member] | Nonperformance risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[3]	0.95
Structured annuity embedded derivatives [Member] | Weighted average [Member] | Surrender rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives, measurement inputs	[4]	0.009
Contingent consideration liabilities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contigent consideration liabilities, fair value		$ 48		$ 44
Contingent consideration liabilities [Member] | Discount rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration liabilities, measurement input		9.00%		9.00%
Contingent consideration liabilities [Member] | Weighted average [Member] | Discount rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration liabilities, measurement input		9.00%

[1] 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.

[2] The weighted average annual long-term default rate of asset backed securities is weighted based on the security’s market value as a percentage of the aggregate market value of the securities.

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

[4] 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.

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

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

[7] 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.

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