Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Unobservable Inputs) (Details) - Ameriprise Financial [Member] - Fair Value, Inputs, Level 3 [Member] - Valuation Technique, Discounted Cash Flow [Member] $ in Millions		Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Corporate debt securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-sale		$ 749	$ 912
Asset-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure		$ 5	$ 6
Asset-backed Securities [Member] | Probability of default, Short-term [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Measurement Input		0.033	0.023
Asset-backed Securities [Member] | Probability of default, Long-term [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Measurement Input		0.030
Asset-backed Securities [Member] | Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Measurement Input		0.120	0.115
IUL embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		$ 881	$ 628
IUL embedded derivatives [Member] | Nonperformance Risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	[1]	0.0065	0.0119
Indexed annuity embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		$ 43	$ 14
Indexed annuity embedded derivatives [Member] | Nonperformance Risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	[1]	0.0065	0.0119
GMWB and GMAB embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		$ 763	$ 328
GMWB and GMAB embedded derivatives [Member] | Nonperformance Risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	[1]	0.0065	0.0119
Contingent Consideration Liability [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Liabilities at fair value		$ 44	$ 30
Contingent Consideration Liability [Member] | Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Liabilities, Fair Value Disclosure, Measurement input		9.00%	9.00%
Minimum [Member] | Corporate debt securities [Member] | Yield and Spread to Treasury [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Measurement Input		0.008	0.010
Minimum [Member] | Asset-backed Securities [Member] | Probability of default, Long-term [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Measurement Input			0.025
Minimum [Member] | Asset-backed Securities [Member] | Prepayment Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Measurement Input		0.050	0.050
Minimum [Member] | Asset-backed Securities [Member] | Loss Severity [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Measurement Input		0.364	0.364
Minimum [Member] | Indexed annuity embedded derivatives [Member] | Surrender Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input		0.000	0.000
Minimum [Member] | GMWB and GMAB embedded derivatives [Member] | Surrender Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input		0.001	0.001
Minimum [Member] | GMWB and GMAB embedded derivatives [Member] | Utilization of Guaranteed Withdrawals [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	[2]	0.000	0.000
Minimum [Member] | GMWB and GMAB embedded derivatives [Member] | Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	[3]	0.037	0.040
Maximum [Member] | Corporate debt securities [Member] | Yield and Spread to Treasury [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Measurement Input		0.028	0.036
Maximum [Member] | Asset-backed Securities [Member] | Probability of default, Long-term [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Measurement Input			0.030
Maximum [Member] | Asset-backed Securities [Member] | Prepayment Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Measurement Input		0.100	0.100
Maximum [Member] | Asset-backed Securities [Member] | Loss Severity [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Measurement Input		0.636	0.636
Maximum [Member] | Indexed annuity embedded derivatives [Member] | Surrender Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input		0.500	0.500
Maximum [Member] | GMWB and GMAB embedded derivatives [Member] | Surrender Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input		0.735	0.734
Maximum [Member] | GMWB and GMAB embedded derivatives [Member] | Utilization of Guaranteed Withdrawals [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	[2]	0.360	0.360
Maximum [Member] | GMWB and GMAB embedded derivatives [Member] | Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	[3]	0.159	0.161
Weighted Average [Member] | Corporate debt securities [Member] | Yield and Spread to Treasury [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Measurement Input		0.012	0.015
Weighted Average [Member] | Asset-backed Securities [Member] | Probability of default, Long-term [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Measurement Input			0.029
Weighted Average [Member] | Asset-backed Securities [Member] | Prepayment Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Measurement Input		0.100	0.100
Weighted Average [Member] | Asset-backed Securities [Member] | Loss Severity [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Measurement Input		0.636	0.636

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

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

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