Fair Values of Assets and Liabilities - Recurring Basis (Details) - USD ($) $ in Millions		9 Months Ended		12 Months Ended
		Sep. 30, 2021		Dec. 31, 2020
Liabilities
Liabilities embedded derivatives, net	[1],[2]	$ 2,633		$ 3,381
GMWB and GMAB embedded derivatives
Assets
Receivables: embedded derivatives		142		67
Liabilities
Liabilities embedded derivatives		1,600		2,400
Ameriprise Financial
Assets
Available-for-Sale: Fixed maturities, at fair value		30,114		36,283
Separate account assets at NAV		95,129		92,611
Investments and cash equivalents segregated for regulatory purposes		2,351		2,558
Ameriprise Financial | Corporate debt securities
Assets
Available-for-Sale: Fixed maturities, at fair value		9,725		13,674
Ameriprise Financial | Residential mortgage backed securities
Assets
Available-for-Sale: Fixed maturities, at fair value		9,699		10,029
Ameriprise Financial | Commercial mortgage backed securities
Assets
Available-for-Sale: Fixed maturities, at fair value		4,795		6,088
Ameriprise Financial | Asset backed securities
Assets
Available-for-Sale: Fixed maturities, at fair value		3,495		3,329
Ameriprise Financial | State and municipal obligations
Assets
Available-for-Sale: Fixed maturities, at fair value		1,104		1,384
Ameriprise Financial | U.S. government and agencies obligations
Assets
Available-for-Sale: Fixed maturities, at fair value		1,196		1,456
Ameriprise Financial | Foreign government bonds and obligations
Assets
Available-for-Sale: Fixed maturities, at fair value		87		262
Ameriprise Financial | Other securities
Assets
Available-for-Sale: Fixed maturities, at fair value		13		61
Ameriprise Financial | Policyholder account balances, future policy benefits and claims embedded derivatives
Liabilities
Cumulative increase (decrease) in embedded derivatives of adjustment for nonperformance risk		(550)		727
Ameriprise Financial | Level 3 | Corporate debt securities
Assets
Available-for-Sale: Fixed maturities, at fair value		520		772
Ameriprise Financial | Level 3 | Fixed Deferred Indexed Annuity Ceded Embedded Derivatives
Assets
Receivables: embedded derivatives		56
Ameriprise Financial | Level 3 | Fixed deferred indexed annuity embedded derivatives
Liabilities
Liabilities embedded derivatives		54		49
Ameriprise Financial | Level 3 | IUL embedded derivatives
Liabilities
Liabilities embedded derivatives		917		935
Ameriprise Financial | Level 3 | GMWB and GMAB embedded derivatives
Liabilities
Liabilities embedded derivatives, net		1,436		2,316
Ameriprise Financial | Level 3 | Structured variable annuity embedded derivatives
Liabilities
Liabilities embedded derivatives		217		70
Ameriprise Financial | Recurring basis
Assets
Cash equivalents		6,399		5,441
Available-for-Sale: Fixed maturities, at fair value		30,114		36,283
Investments at NAV	[3]	8		8
Trading and other securities		33		88
Separate account assets at NAV	[3]	95,129		92,611
Investments and cash equivalents segregated for regulatory purposes		650		600
Other assets: derivative contracts		5,687		5,870
Total assets at fair value		138,076		140,901
Liabilities
Other		52		48
Other liabilities		4,166		4,360
Total liabilities at fair value		6,799		7,741
Ameriprise Financial | Recurring basis | Corporate debt securities
Assets
Available-for-Sale: Fixed maturities, at fair value		9,725		13,674
Ameriprise Financial | Recurring basis | Residential mortgage backed securities
Assets
Available-for-Sale: Fixed maturities, at fair value		9,699		10,029
Ameriprise Financial | Recurring basis | Commercial mortgage backed securities
Assets
Available-for-Sale: Fixed maturities, at fair value		4,795		6,088
Ameriprise Financial | Recurring basis | Asset backed securities
Assets
Available-for-Sale: Fixed maturities, at fair value		3,495		3,329
Ameriprise Financial | Recurring basis | State and municipal obligations
Assets
Available-for-Sale: Fixed maturities, at fair value		1,104		1,384
Ameriprise Financial | Recurring basis | U.S. government and agencies obligations
Assets
Available-for-Sale: Fixed maturities, at fair value		1,196		1,456
Ameriprise Financial | Recurring basis | Foreign government bonds and obligations
Assets
Available-for-Sale: Fixed maturities, at fair value		87		262
Ameriprise Financial | Recurring basis | Other securities
Assets
Available-for-Sale: Fixed maturities, at fair value		13		61
Ameriprise Financial | Recurring basis | Fixed Deferred Indexed Annuity Ceded Embedded Derivatives
Assets
Receivables: embedded derivatives		56
Ameriprise Financial | Recurring basis | Policyholder account balances, future policy benefits and claims embedded derivatives
Liabilities
Liabilities embedded derivatives, net		2,628	[4]	3,373	[5]
Ameriprise Financial | Recurring basis | Fixed deferred indexed annuity embedded derivatives
Liabilities
Liabilities embedded derivatives		58		52
Ameriprise Financial | Recurring basis | IUL embedded derivatives
Liabilities
Liabilities embedded derivatives		917		935
Ameriprise Financial | Recurring basis | GMWB and GMAB embedded derivatives
Liabilities
Liabilities embedded derivatives, net		1,436	[6]	2,316	[7]
Ameriprise Financial | Recurring basis | Structured variable annuity embedded derivatives
Liabilities
Liabilities embedded derivatives		217		70
Ameriprise Financial | Recurring basis | Customer deposits - SMC embedded derivatives
Liabilities
Liabilities embedded derivatives		5		8
Ameriprise Financial | Recurring basis | Interest rate derivative contracts
Assets
Other assets: derivative contracts		1,185		1,755
Liabilities
Other liabilities: derivative contracts		476		734
Ameriprise Financial | Recurring basis | Equity derivative contracts
Assets
Other assets: derivative contracts		4,465		4,090
Liabilities
Other liabilities: derivative contracts		3,619		3,571
Ameriprise Financial | Recurring basis | Credit derivative contracts
Assets
Other assets: derivative contracts		18		2
Liabilities
Other liabilities: derivative contracts				1
Ameriprise Financial | Recurring basis | Foreign exchange derivative contracts
Assets
Other assets: derivative contracts		19		23
Liabilities
Other liabilities: derivative contracts		19		6
Ameriprise Financial | Recurring basis | Level 1
Assets
Cash equivalents		3,077		2,935
Available-for-Sale: Fixed maturities, at fair value		1,196		1,456
Trading and other securities		11		61
Investments and cash equivalents segregated for regulatory purposes		650		600
Other assets: derivative contracts		487		410
Total assets at fair value		5,421		5,462
Liabilities
Other		8		2
Other liabilities		179		187
Total liabilities at fair value		179		187
Ameriprise Financial | Recurring basis | Level 1 | U.S. government and agencies obligations
Assets
Available-for-Sale: Fixed maturities, at fair value		1,196		1,456
Ameriprise Financial | Recurring basis | Level 1 | Interest rate derivative contracts
Assets
Other assets: derivative contracts		1		1
Ameriprise Financial | Recurring basis | Level 1 | Equity derivative contracts
Assets
Other assets: derivative contracts		486		408
Liabilities
Other liabilities: derivative contracts		169		183
Ameriprise Financial | Recurring basis | Level 1 | Foreign exchange derivative contracts
Assets
Other assets: derivative contracts				1
Liabilities
Other liabilities: derivative contracts		2		2
Ameriprise Financial | Recurring basis | Level 2
Assets
Cash equivalents		3,322		2,506
Available-for-Sale: Fixed maturities, at fair value		28,391		34,014
Trading and other securities		22		27
Other assets: derivative contracts		5,200		5,460
Total assets at fair value		36,935		42,007
Liabilities
Other		4		3
Other liabilities		3,947		4,130
Total liabilities at fair value		3,956		4,141
Ameriprise Financial | Recurring basis | Level 2 | Corporate debt securities
Assets
Available-for-Sale: Fixed maturities, at fair value		9,205		12,902
Ameriprise Financial | Recurring basis | Level 2 | Residential mortgage backed securities
Assets
Available-for-Sale: Fixed maturities, at fair value		9,699		10,020
Ameriprise Financial | Recurring basis | Level 2 | Commercial mortgage backed securities
Assets
Available-for-Sale: Fixed maturities, at fair value		4,795		6,088
Ameriprise Financial | Recurring basis | Level 2 | Asset backed securities
Assets
Available-for-Sale: Fixed maturities, at fair value		3,488		3,297
Ameriprise Financial | Recurring basis | Level 2 | State and municipal obligations
Assets
Available-for-Sale: Fixed maturities, at fair value		1,104		1,384
Ameriprise Financial | Recurring basis | Level 2 | Foreign government bonds and obligations
Assets
Available-for-Sale: Fixed maturities, at fair value		87		262
Ameriprise Financial | Recurring basis | Level 2 | Other securities
Assets
Available-for-Sale: Fixed maturities, at fair value		13		61
Ameriprise Financial | Recurring basis | Level 2 | Policyholder account balances, future policy benefits and claims embedded derivatives
Liabilities
Liabilities embedded derivatives, net		4		3
Ameriprise Financial | Recurring basis | Level 2 | Fixed deferred indexed annuity embedded derivatives
Liabilities
Liabilities embedded derivatives		4		3
Ameriprise Financial | Recurring basis | Level 2 | Customer deposits - SMC embedded derivatives
Liabilities
Liabilities embedded derivatives		5		8
Ameriprise Financial | Recurring basis | Level 2 | Interest rate derivative contracts
Assets
Other assets: derivative contracts		1,184		1,754
Liabilities
Other liabilities: derivative contracts		476		734
Ameriprise Financial | Recurring basis | Level 2 | Equity derivative contracts
Assets
Other assets: derivative contracts		3,979		3,682
Liabilities
Other liabilities: derivative contracts		3,450		3,388
Ameriprise Financial | Recurring basis | Level 2 | Credit derivative contracts
Assets
Other assets: derivative contracts		18		2
Liabilities
Other liabilities: derivative contracts				1
Ameriprise Financial | Recurring basis | Level 2 | Foreign exchange derivative contracts
Assets
Other assets: derivative contracts		19		22
Liabilities
Other liabilities: derivative contracts		17		4
Ameriprise Financial | Recurring basis | Level 3
Assets
Available-for-Sale: Fixed maturities, at fair value		527		813
Total assets at fair value		583		813
Liabilities
Other		40		43
Other liabilities		40		43
Total liabilities at fair value		2,664		3,413
Ameriprise Financial | Recurring basis | Level 3 | Corporate debt securities
Assets
Available-for-Sale: Fixed maturities, at fair value		520		772
Ameriprise Financial | Recurring basis | Level 3 | Residential mortgage backed securities
Assets
Available-for-Sale: Fixed maturities, at fair value				9
Ameriprise Financial | Recurring basis | Level 3 | Asset backed securities
Assets
Available-for-Sale: Fixed maturities, at fair value		7		32
Ameriprise Financial | Recurring basis | Level 3 | Fixed Deferred Indexed Annuity Ceded Embedded Derivatives
Assets
Receivables: embedded derivatives		56
Ameriprise Financial | Recurring basis | Level 3 | Policyholder account balances, future policy benefits and claims embedded derivatives
Liabilities
Liabilities embedded derivatives, net		2,624		3,370
Ameriprise Financial | Recurring basis | Level 3 | Fixed deferred indexed annuity embedded derivatives
Liabilities
Liabilities embedded derivatives		54		49
Ameriprise Financial | Recurring basis | Level 3 | IUL embedded derivatives
Liabilities
Liabilities embedded derivatives		917	[1],[2]	935
Ameriprise Financial | Recurring basis | Level 3 | GMWB and GMAB embedded derivatives
Liabilities
Liabilities embedded derivatives, net		1,436		2,316
Ameriprise Financial | Recurring basis | Level 3 | Structured variable annuity embedded derivatives
Liabilities
Liabilities embedded derivatives		$ 217		$ 70

[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 September 30, 2021 and December 31, 2020, respectively. See Note 13 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 $550 million cumulative decrease to the embedded derivatives as of September 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 $1.6 billion of individual contracts in a liability position and $142 million of individual contracts in an asset position (recorded as a contra liability) as of September 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.