Fair Values of Assets and Liabilities (Recurring) (Details) - USD ($) $ in Millions		6 Months Ended		12 Months Ended
		Jun. 30, 2021		Dec. 31, 2020
Liabilities
Embedded derivative	[1],[2]	$ 2,579		$ 3,381
GMWB and GMAB embedded derivatives
Liabilities
Individual contracts in a liablity position		1,500		2,400
Individual contracts in an asset position		154		67
Ameriprise Financial
Assets
Available-for-Sale securities, at fair value		36,146		36,283
Separate account assets		96,854		92,611
Investments and cash equivalents segregated for regulatory purposes		2,382		2,558
Liabilities
Cumulative increase (decrease) in embedded derivatives of adjustment for nonperformance risk		547		(727)
Ameriprise Financial | Corporate debt securities
Assets
Available-for-Sale securities, at fair value		13,676		13,674
Ameriprise Financial | Residential mortgage backed securities
Assets
Available-for-Sale securities, at fair value		9,682		10,029
Ameriprise Financial | Commercial mortgage backed securities
Assets
Available-for-Sale securities, at fair value		6,178		6,088
Ameriprise Financial | Asset backed securities
Assets
Available-for-Sale securities, at fair value		3,648		3,329
Ameriprise Financial | State and municipal obligations
Assets
Available-for-Sale securities, at fair value		1,319		1,384
Ameriprise Financial | U.S. government and agencies obligations
Assets
Available-for-Sale securities, at fair value		1,326		1,456
Ameriprise Financial | Foreign government bonds and obligations
Assets
Available-for-Sale securities, at fair value		223		262
Ameriprise Financial | Recurring basis
Assets
Cash equivalents		6,001		5,441
Available-for-Sale securities, at fair value		36,146		36,283
Investments at NAV	[3]	8		8
Trading and other securities		51		88
Separate account assets	[3]	96,854		92,611
Investments and cash equivalents segregated for regulatory purposes		765		600
Other assets: derivative contracts		6,120		5,870
Total assets at fair value		145,945		140,901
Liabilities
Other		55		48
Other liabilities		4,576		4,360
Total liabilities at fair value		7,155		7,741
Ameriprise Financial | Recurring basis | Policyholder account balances, future policy benefits and claims embedded derivatives
Liabilities
Embedded derivative		2,573	[4]	3,373	[5]
Ameriprise Financial | Recurring basis | Fixed deferred indexed annuity embedded derivatives
Liabilities
Embedded derivative		58		52
Ameriprise Financial | Recurring basis | IUL embedded derivatives
Liabilities
Embedded derivative		928		935
Ameriprise Financial | Recurring basis | GMWB and GMAB embedded derivatives
Liabilities
Embedded derivative		1,373	[6]	2,316	[7]
Ameriprise Financial | Recurring basis | Structured annuity embedded derivatives
Liabilities
Embedded derivative		214		70
Ameriprise Financial | Recurring basis | Customer deposits - SMC embedded derivatives
Liabilities
Embedded derivative		6		8
Ameriprise Financial | Recurring basis | Interest rate derivative contracts
Assets
Other assets: derivative contracts		1,417		1,755
Liabilities
Other liabilities: derivative contracts		558		734
Ameriprise Financial | Recurring basis | Equity derivative contracts
Assets
Other assets: derivative contracts		4,678		4,090
Liabilities
Other liabilities: derivative contracts		3,950		3,571
Ameriprise Financial | Recurring basis | Credit derivative contracts
Assets
Other assets: derivative contracts		1		2
Liabilities
Other liabilities: derivative contracts				1
Other liabilities		7
Ameriprise Financial | Recurring basis | Foreign exchange derivative contracts
Assets
Other assets: derivative contracts		24		23
Liabilities
Other liabilities: derivative contracts		6		6
Ameriprise Financial | Recurring basis | Corporate debt securities
Assets
Available-for-Sale securities, at fair value		13,676		13,674
Ameriprise Financial | Recurring basis | Residential mortgage backed securities
Assets
Available-for-Sale securities, at fair value		9,682		10,029
Ameriprise Financial | Recurring basis | Commercial mortgage backed securities
Assets
Available-for-Sale securities, at fair value		6,178		6,088
Ameriprise Financial | Recurring basis | Asset backed securities
Assets
Available-for-Sale securities, at fair value		3,648		3,329
Ameriprise Financial | Recurring basis | State and municipal obligations
Assets
Available-for-Sale securities, at fair value		1,319		1,384
Ameriprise Financial | Recurring basis | U.S. government and agencies obligations
Assets
Available-for-Sale securities, at fair value		1,326		1,456
Ameriprise Financial | Recurring basis | Foreign government bonds and obligations
Assets
Available-for-Sale securities, at fair value		223		262
Ameriprise Financial | Recurring basis | Other investments
Assets
Available-for-Sale securities, at fair value		94		61
Ameriprise Financial | Recurring basis | Level 1
Assets
Cash equivalents		2,359		2,935
Available-for-Sale securities, at fair value		1,326		1,456
Trading and other securities		20		61
Investments and cash equivalents segregated for regulatory purposes		765		600
Other assets: derivative contracts		452		410
Total assets at fair value		4,922		5,462
Liabilities
Other		8		2
Other liabilities		169		187
Total liabilities at fair value		169		187
Ameriprise Financial | Recurring basis | Level 1 | Interest rate derivative contracts
Assets
Other assets: derivative contracts		2		1
Ameriprise Financial | Recurring basis | Level 1 | Equity derivative contracts
Assets
Other assets: derivative contracts		448		408
Liabilities
Other liabilities: derivative contracts		160		183
Ameriprise Financial | Recurring basis | Level 1 | Foreign exchange derivative contracts
Assets
Other assets: derivative contracts		2		1
Liabilities
Other liabilities: derivative contracts		1		2
Ameriprise Financial | Recurring basis | Level 1 | U.S. government and agencies obligations
Assets
Available-for-Sale securities, at fair value		1,326		1,456
Ameriprise Financial | Recurring basis | Level 2
Assets
Cash equivalents		3,642		2,506
Available-for-Sale securities, at fair value		34,423		34,014
Trading and other securities		31		27
Other assets: derivative contracts		5,668		5,460
Total assets at fair value		43,764		42,007
Liabilities
Other		3		3
Other liabilities		4,363		4,130
Total liabilities at fair value		4,373		4,141
Ameriprise Financial | Recurring basis | Level 2 | Policyholder account balances, future policy benefits and claims embedded derivatives
Liabilities
Embedded derivative		4		3
Ameriprise Financial | Recurring basis | Level 2 | Fixed deferred indexed annuity embedded derivatives
Liabilities
Embedded derivative		4		3
Ameriprise Financial | Recurring basis | Level 2 | Customer deposits - SMC embedded derivatives
Liabilities
Embedded derivative		6		8
Ameriprise Financial | Recurring basis | Level 2 | Interest rate derivative contracts
Assets
Other assets: derivative contracts		1,415		1,754
Liabilities
Other liabilities: derivative contracts		558		734
Ameriprise Financial | Recurring basis | Level 2 | Equity derivative contracts
Assets
Other assets: derivative contracts		4,230		3,682
Liabilities
Other liabilities: derivative contracts		3,790		3,388
Ameriprise Financial | Recurring basis | Level 2 | Credit derivative contracts
Assets
Other assets: derivative contracts		1		2
Liabilities
Other liabilities: derivative contracts				1
Other liabilities		7
Ameriprise Financial | Recurring basis | Level 2 | Foreign exchange derivative contracts
Assets
Other assets: derivative contracts		22		22
Liabilities
Other liabilities: derivative contracts		5		4
Ameriprise Financial | Recurring basis | Level 2 | Corporate debt securities
Assets
Available-for-Sale securities, at fair value		13,285		12,902
Ameriprise Financial | Recurring basis | Level 2 | Residential mortgage backed securities
Assets
Available-for-Sale securities, at fair value		9,682		10,020
Ameriprise Financial | Recurring basis | Level 2 | Commercial mortgage backed securities
Assets
Available-for-Sale securities, at fair value		6,178		6,088
Ameriprise Financial | Recurring basis | Level 2 | Asset backed securities
Assets
Available-for-Sale securities, at fair value		3,642		3,297
Ameriprise Financial | Recurring basis | Level 2 | State and municipal obligations
Assets
Available-for-Sale securities, at fair value		1,319		1,384
Ameriprise Financial | Recurring basis | Level 2 | Foreign government bonds and obligations
Assets
Available-for-Sale securities, at fair value		223		262
Ameriprise Financial | Recurring basis | Level 2 | Other investments
Assets
Available-for-Sale securities, at fair value		94		61
Ameriprise Financial | Recurring basis | Level 3
Assets
Available-for-Sale securities, at fair value		397		813
Total assets at fair value		397		813
Liabilities
Other		44		43
Other liabilities		44		43
Total liabilities at fair value		2,613		3,413
Ameriprise Financial | Recurring basis | Level 3 | Policyholder account balances, future policy benefits and claims embedded derivatives
Liabilities
Embedded derivative		2,569		3,370
Ameriprise Financial | Recurring basis | Level 3 | Fixed deferred indexed annuity embedded derivatives
Liabilities
Embedded derivative		54		49
Ameriprise Financial | Recurring basis | Level 3 | IUL embedded derivatives
Liabilities
Embedded derivative		928	[1],[2]	935
Ameriprise Financial | Recurring basis | Level 3 | GMWB and GMAB embedded derivatives
Liabilities
Embedded derivative		1,373		2,316
Ameriprise Financial | Recurring basis | Level 3 | Structured annuity embedded derivatives
Liabilities
Embedded derivative		214		70
Ameriprise Financial | Recurring basis | Level 3 | Corporate debt securities
Assets
Available-for-Sale securities, at fair value		391		772
Ameriprise Financial | Recurring basis | Level 3 | Residential mortgage backed securities
Assets
Available-for-Sale securities, at fair value				9
Ameriprise Financial | Recurring basis | Level 3 | Asset backed securities
Assets
Available-for-Sale securities, at fair value		$ 6		$ 32

[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 June 30, 2021 and December 31, 2020, respectively. See Note 12 for additional information related to master netting arrangements and cash collateral.

[3] Amounts are comprised of certain financial instruments that are measured at fair value using the NAV per share (or its equivalent) as a practical expedient and have not been classified in the fair value hierarchy.

[4] The Company’s adjustment for nonperformance risk resulted in a $547 million cumulative decrease to the embedded derivatives as of June 30, 2021.

[5] The Company’s adjustment for nonperformance risk resulted in a $727 million cumulative decrease to the embedded derivatives as of December 31, 2020.

[6] The fair value of the GMWB and GMAB embedded derivatives included $1.5 billion of individual contracts in a liability position and $154 million of individual contracts in an asset position (recorded as a contra liability) as of June 30, 2021.

[7] The fair value of the GMWB and GMAB embedded derivatives included $2.4 billion of individual contracts in a liability position and $67 million of individual contracts in an asset position (recorded as a contra liability) as of December 31, 2020.