Fair Values of Assets and Liabilities (Recurring) (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
		Mar. 31, 2021		Dec. 31, 2020
Liabilities
Individual contracts in a liability position		$ 3,845		$ 4,312
Individual contracts in an asset position		4,990		5,870
GMWB and GMAB embedded derivatives [Member]
Liabilities
Individual contracts in a liability position		980		2,400
Individual contracts in an asset position		265		67
Ameriprise Financial [Member]
Assets
Available-for-Sale securities		35,832		36,283
Separate account assets		93,483		92,611
Investments and cash equivalents segregated for regulatory purposes		2,564		2,558
Liabilities
Cumulative increase (decrease) in embedded derivatives of adjustment for nonperformance risk		(500)		(727)
Ameriprise Financial [Member] | Corporate debt securities [Member]
Assets
Available-for-Sale securities		13,303		13,674
Ameriprise Financial [Member] | Residential mortgage backed securities [Member]
Assets
Available-for-Sale securities		10,042		10,029
Ameriprise Financial [Member] | Commercial mortgage backed securities [Member]
Assets
Available-for-Sale securities		6,037		6,088
Ameriprise Financial [Member] | Asset backed securities [Member]
Assets
Available-for-Sale securities		3,485		3,329
Ameriprise Financial [Member] | State and municipal obligations [Member]
Assets
Available-for-Sale securities		1,298		1,384
Ameriprise Financial [Member] | U.S. government and agencies obligations [Member]
Assets
Available-for-Sale securities		1,326		1,456
Ameriprise Financial [Member] | Foreign government bonds and obligations [Member]
Assets
Available-for-Sale securities		247		262
Ameriprise Financial [Member] | Recurring basis [Member]
Assets
Cash equivalents		4,474		5,441
Available-for-Sale securities		35,832		36,283
Investments at NAV	[1]	8		8
Trading and other securities		78		88
Separate account assets	[1]	93,483		92,611
Investments and cash equivalents segregated for regulatory purposes		815		600
Other assets: derivative contracts		4,990		5,870
Total assets at fair value		139,680		140,901
Liabilities
Policyholder account balances, future policy benefits and claims		1,844	[2]	3,373	[3]
Customer deposits		7		8
Other		53		48
Other liabilities		3,898		4,360
Total liabilities at fair value		5,749		7,741
Ameriprise Financial [Member] | Recurring basis [Member] | Fixed deferred indexed annuity embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		56		52
Ameriprise Financial [Member] | Recurring basis [Member] | IUL embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		949		935
Ameriprise Financial [Member] | Recurring basis [Member] | GMWB and GMAB embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		715	[4]	2,316	[5]
Ameriprise Financial [Member] | Recurring basis [Member] | Structured annuity embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		124		70
Ameriprise Financial [Member] | Recurring basis [Member] | Interest rate derivative contracts [Member]
Assets
Other assets: derivative contracts		1,003		1,755
Liabilities
Other liabilities: derivative contracts		486		734
Ameriprise Financial [Member] | Recurring basis [Member] | Equity derivative contracts [Member]
Assets
Other assets: derivative contracts		3,943		4,090
Liabilities
Other liabilities: derivative contracts		3,353		3,571
Ameriprise Financial [Member] | Recurring basis [Member] | Credit derivative contracts [Member]
Assets
Other assets: derivative contracts		26		2
Liabilities
Other liabilities: derivative contracts				1
Ameriprise Financial [Member] | Recurring basis [Member] | Foreign exchange derivative contracts [Member]
Assets
Other assets: derivative contracts		18		23
Liabilities
Other liabilities: derivative contracts		6		6
Ameriprise Financial [Member] | Recurring basis [Member] | Corporate debt securities [Member]
Assets
Available-for-Sale securities		13,303		13,674
Ameriprise Financial [Member] | Recurring basis [Member] | Residential mortgage backed securities [Member]
Assets
Available-for-Sale securities		10,042		10,029
Ameriprise Financial [Member] | Recurring basis [Member] | Commercial mortgage backed securities [Member]
Assets
Available-for-Sale securities		6,037		6,088
Ameriprise Financial [Member] | Recurring basis [Member] | Asset backed securities [Member]
Assets
Available-for-Sale securities		3,485		3,329
Ameriprise Financial [Member] | Recurring basis [Member] | State and municipal obligations [Member]
Assets
Available-for-Sale securities		1,298		1,384
Ameriprise Financial [Member] | Recurring basis [Member] | U.S. government and agencies obligations [Member]
Assets
Available-for-Sale securities		1,326		1,456
Ameriprise Financial [Member] | Recurring basis [Member] | Foreign government bonds and obligations [Member]
Assets
Available-for-Sale securities		247		262
Ameriprise Financial [Member] | Recurring basis [Member] | Other investments [Member]
Assets
Available-for-Sale securities		94		61
Ameriprise Financial [Member] | Recurring basis [Member] | Level 1 [Member]
Assets
Cash equivalents		1,875		2,935
Available-for-Sale securities		1,326		1,456
Trading and other securities		61		61
Investments and cash equivalents segregated for regulatory purposes		815		600
Other assets: derivative contracts		335		410
Total assets at fair value		4,412		5,462
Liabilities
Other		3		2
Other liabilities		154		187
Total liabilities at fair value		154		187
Ameriprise Financial [Member] | Recurring basis [Member] | Level 1 [Member] | Interest rate derivative contracts [Member]
Assets
Other assets: derivative contracts				1
Liabilities
Other liabilities: derivative contracts		1
Ameriprise Financial [Member] | Recurring basis [Member] | Level 1 [Member] | Equity derivative contracts [Member]
Assets
Other assets: derivative contracts		334		408
Liabilities
Other liabilities: derivative contracts		149		183
Ameriprise Financial [Member] | Recurring basis [Member] | Level 1 [Member] | Foreign exchange derivative contracts [Member]
Assets
Other assets: derivative contracts		1		1
Liabilities
Other liabilities: derivative contracts		1		2
Ameriprise Financial [Member] | Recurring basis [Member] | Level 1 [Member] | U.S. government and agencies obligations [Member]
Assets
Available-for-Sale securities		1,326		1,456
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member]
Assets
Cash equivalents		2,599		2,506
Available-for-Sale securities		33,577		34,014
Trading and other securities		17		27
Other assets: derivative contracts		4,655		5,460
Total assets at fair value		40,848		42,007
Liabilities
Policyholder account balances, future policy benefits and claims		4		3
Customer deposits		7		8
Other		7		3
Other liabilities		3,701		4,130
Total liabilities at fair value		3,712		4,141
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Fixed deferred indexed annuity embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		4		3
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Interest rate derivative contracts [Member]
Assets
Other assets: derivative contracts		1,003		1,754
Liabilities
Other liabilities: derivative contracts		485		734
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Equity derivative contracts [Member]
Assets
Other assets: derivative contracts		3,609		3,682
Liabilities
Other liabilities: derivative contracts		3,204		3,388
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Credit derivative contracts [Member]
Assets
Other assets: derivative contracts		26		2
Liabilities
Other liabilities: derivative contracts				1
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Foreign exchange derivative contracts [Member]
Assets
Other assets: derivative contracts		17		22
Liabilities
Other liabilities: derivative contracts		5		4
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Corporate debt securities [Member]
Assets
Available-for-Sale securities		12,491		12,902
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Residential mortgage backed securities [Member]
Assets
Available-for-Sale securities		9,955		10,020
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Commercial mortgage backed securities [Member]
Assets
Available-for-Sale securities		6,037		6,088
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Asset backed securities [Member]
Assets
Available-for-Sale securities		3,455		3,297
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | State and municipal obligations [Member]
Assets
Available-for-Sale securities		1,298		1,384
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Foreign government bonds and obligations [Member]
Assets
Available-for-Sale securities		247		262
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Other investments [Member]
Assets
Available-for-Sale securities		94		61
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member]
Assets
Available-for-Sale securities		929		813
Total assets at fair value		929		813
Liabilities
Policyholder account balances, future policy benefits and claims		1,840		3,370
Other		43		43
Other liabilities		43		43
Total liabilities at fair value		1,883		3,413
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | Fixed deferred indexed annuity embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		52		49
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | IUL embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		949	[6],[7]	935
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | GMWB and GMAB embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		715		2,316
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | Structured annuity embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		124		70
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | Corporate debt securities [Member]
Assets
Available-for-Sale securities		812		772
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | Residential mortgage backed securities [Member]
Assets
Available-for-Sale securities		87		9
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | Asset backed securities [Member]
Assets
Available-for-Sale securities		$ 30		$ 32

[1] 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.

[2] The Company’s adjustment for nonperformance risk resulted in a $500 million cumulative decrease to the embedded derivatives as of March 31, 2021.

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

[4] The fair value of the GMWB and GMAB embedded derivatives included $980 million of individual contracts in a liability position and $265 million of individual contracts in an asset position (recorded as a contra liability) as of March 31, 2021.

[5] 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.

[6] 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.

[7] 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.