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, 2018 USD ($)	Dec. 31, 2017 USD ($)
Corporate Debt Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-sale		$ 912	$ 1,138
Asset-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure		$ 6	$ 7
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		0.023	0.038
Asset-backed Securities [Member] | Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Measurement Input		0.115	0.105
IUL embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		$ 628	$ 601
IUL embedded derivatives [Member] | Counterparty Credit Risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	[1]	0.0119	0.0071
Indexed annuity embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		$ 14
Indexed annuity embedded derivatives [Member] | Counterparty Credit Risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	[1]	0.0119
GMWB and GMAB embedded derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		$ 328	$ (49)
GMWB and GMAB embedded derivatives [Member] | Counterparty Credit Risk [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	[1]	0.0119	0.0071
Contingent Consideration Liability [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Liabilities at fair value		$ 30	$ 28
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		0.010	0.007
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	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
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]	0.040	0.037
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		0.036	0.023
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	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
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		0.734	0.747
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	0.420
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]	0.161	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		0.015	0.011
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	0.027
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	0.099
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	0.632

[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.