Fair Values of Assets and Liabilities (Recurring) (Details) - USD ($) $ in Millions		9 Months Ended		12 Months Ended
		Sep. 30, 2019		Dec. 31, 2018
Liabilities
Individual contracts in a liability position	[1],[2]	$ 5,712		$ 3,610
Individual contracts in an asset position	[3]	4,272		2,574
Cumulative increase (decrease) in embedded derivatives of adjustment for nonperformance risk		(704)		(726)
GMWB and GMAB embedded derivatives [Member]
Liabilities
Individual contracts in a liability position		1,600		646
Individual contracts in an asset position		107		318
Ameriprise Financial [Member]
Assets
Available-for-Sale securities		30,967		31,058
Separate account assets at NAV		84,067		77,925
Investments segregated for regulatory purposes		2,174		2,910
Ameriprise Financial [Member] | Corporate debt securities [Member]
Assets
Available-for-Sale securities		12,508		14,066
Ameriprise Financial [Member] | Residential mortgage backed securities [Member]
Assets
Available-for-Sale securities		8,112		6,329
Ameriprise Financial [Member] | Commercial mortgage backed securities [Member]
Assets
Available-for-Sale securities		5,275		4,877
Ameriprise Financial [Member] | Asset backed securities [Member]
Assets
Available-for-Sale securities		1,680		1,398
Ameriprise Financial [Member] | State and municipal obligations [Member]
Assets
Available-for-Sale securities		1,428		2,345
Ameriprise Financial [Member] | U.S. government and agencies obligations [Member]
Assets
Available-for-Sale securities		1,693		1,745
Ameriprise Financial [Member] | Foreign government bonds and obligations [Member]
Assets
Available-for-Sale securities		271		298
Ameriprise Financial [Member] | Recurring basis [Member]
Assets
Cash equivalents		4,615		2,505
Available-for-Sale securities		30,967		31,058
Equity securities		1		1
Equity securities at NAV	[4]	6		6
Trading and other securities at fair value		41		74
Separate account assets at NAV	[4]	84,067		77,925
Investments segregated for regulatory purposes		13		301
Other assets		4,272		2,574
Total assets at fair value		123,982		114,444
Liabilities
Policyholder account balances, future policy benefits and claims		2,314	[5]	973	[6]
Customer deposits		13		6
Other liabilities		3,423		2,680
Total liabilities at fair value		5,750		3,659
Ameriprise Financial [Member] | Recurring basis [Member] | Other liabilities [Member]
Liabilities
Other liabilities		38		49
Ameriprise Financial [Member] | Recurring basis [Member] | Indexed annuity embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		40		17
Ameriprise Financial [Member] | Recurring basis [Member] | IUL embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		822		628
Ameriprise Financial [Member] | Recurring basis [Member] | GMWB and GMAB embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		1,452	[7]	328	[8]
Ameriprise Financial [Member] | Recurring basis [Member] | Interest rate derivative contracts [Member]
Assets
Other assets		1,970		796
Liabilities
Other liabilities		521		424
Ameriprise Financial [Member] | Recurring basis [Member] | Equity derivative contracts [Member]
Assets
Other assets		2,240		1,718
Liabilities
Other liabilities		2,830		2,154
Ameriprise Financial [Member] | Recurring basis [Member] | Credit derivative contracts [Member]
Assets
Other assets		10
Liabilities
Other liabilities				18
Ameriprise Financial [Member] | Recurring basis [Member] | Foreign exchange derivative contracts [Member]
Assets
Other assets		52		60
Liabilities
Other liabilities		34		35
Ameriprise Financial [Member] | Recurring basis [Member] | Corporate debt securities [Member]
Assets
Available-for-Sale securities		12,508		14,066
Ameriprise Financial [Member] | Recurring basis [Member] | Residential mortgage backed securities [Member]
Assets
Available-for-Sale securities		8,112		6,329
Ameriprise Financial [Member] | Recurring basis [Member] | Commercial mortgage backed securities [Member]
Assets
Available-for-Sale securities		5,275		4,877
Ameriprise Financial [Member] | Recurring basis [Member] | Asset backed securities [Member]
Assets
Available-for-Sale securities		1,680		1,398
Ameriprise Financial [Member] | Recurring basis [Member] | State and municipal obligations [Member]
Assets
Available-for-Sale securities		1,428		2,345
Ameriprise Financial [Member] | Recurring basis [Member] | U.S. government and agencies obligations [Member]
Assets
Available-for-Sale securities		1,693		1,745
Ameriprise Financial [Member] | Recurring basis [Member] | Foreign government bonds and obligations [Member]
Assets
Available-for-Sale securities		271		298
Ameriprise Financial [Member] | Recurring basis [Member] | Level 1 [Member]
Assets
Cash equivalents		349		155
Available-for-Sale securities		1,693		1,745
Equity securities		1
Trading and other securities at fair value		11		36
Investments segregated for regulatory purposes		13		301
Other assets		137		196
Total assets at fair value		2,204		2,433
Liabilities
Other liabilities		26		95
Total liabilities at fair value		26		95
Ameriprise Financial [Member] | Recurring basis [Member] | Level 1 [Member] | Other liabilities [Member]
Liabilities
Other liabilities		6		13
Ameriprise Financial [Member] | Recurring basis [Member] | Level 1 [Member] | Equity derivative contracts [Member]
Assets
Other assets		137		191
Liabilities
Other liabilities		19		78
Ameriprise Financial [Member] | Recurring basis [Member] | Level 1 [Member] | Foreign exchange derivative contracts [Member]
Assets
Other assets				5
Liabilities
Other liabilities		1		4
Ameriprise Financial [Member] | Recurring basis [Member] | Level 1 [Member] | U.S. government and agencies obligations [Member]
Assets
Available-for-Sale securities		1,693		1,745
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member]
Assets
Cash equivalents		4,266		2,350
Available-for-Sale securities		28,306		28,238
Equity securities				1
Trading and other securities at fair value		30		38
Other assets		4,135		2,378
Total assets at fair value		36,737		33,005
Liabilities
Policyholder account balances, future policy benefits and claims		3		3
Customer deposits		13		6
Other liabilities		3,371		2,555
Total liabilities at fair value		3,387		2,564
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Other liabilities [Member]
Liabilities
Other liabilities		6		6
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Indexed annuity embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		3		3
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Interest rate derivative contracts [Member]
Assets
Other assets		1,970		796
Liabilities
Other liabilities		521		424
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Equity derivative contracts [Member]
Assets
Other assets		2,103		1,527
Liabilities
Other liabilities		2,811		2,076
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Credit derivative contracts [Member]
Assets
Other assets		10
Liabilities
Other liabilities				18
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Foreign exchange derivative contracts [Member]
Assets
Other assets		52		55
Liabilities
Other liabilities		33		31
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Corporate debt securities [Member]
Assets
Available-for-Sale securities		11,714		13,153
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Residential mortgage backed securities [Member]
Assets
Available-for-Sale securities		7,958		6,193
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Commercial mortgage backed securities [Member]
Assets
Available-for-Sale securities		5,275		4,857
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Asset backed securities [Member]
Assets
Available-for-Sale securities		1,660		1,392
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | State and municipal obligations [Member]
Assets
Available-for-Sale securities		1,428		2,345
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member] | Foreign government bonds and obligations [Member]
Assets
Available-for-Sale securities		271		298
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member]
Assets
Available-for-Sale securities		968		1,075
Total assets at fair value		968		1,075
Liabilities
Policyholder account balances, future policy benefits and claims		2,311		970
Other liabilities		26		30
Total liabilities at fair value		2,337		1,000
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | Other liabilities [Member]
Liabilities
Other liabilities		26		30
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | Indexed annuity embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		37		14
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | IUL embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		822		628
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | GMWB and GMAB embedded derivatives [Member]
Liabilities
Policyholder account balances, future policy benefits and claims		1,452		328
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | Corporate debt securities [Member]
Assets
Available-for-Sale securities		794		913
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | Residential mortgage backed securities [Member]
Assets
Available-for-Sale securities		154		136
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | Commercial mortgage backed securities [Member]
Assets
Available-for-Sale securities				20
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member] | Asset backed securities [Member]
Assets
Available-for-Sale securities		$ 20		$ 6

[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, and indexed 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 $1.4 billion as of September 30, 2019 and December 31, 2018, respectively. See Note 12 for additional information related to master netting arrangements and cash collateral.

[3] The fair value of freestanding derivative assets is included in Other assets on the Consolidated Balance Sheets.

[4] 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.

[5] The Company’s adjustment for nonperformance risk resulted in a $(704) million cumulative increase (decrease) to the embedded derivatives as of September 30, 2019.

[6] The Company’s adjustment for nonperformance risk resulted in a $(726) million cumulative increase (decrease) to the embedded derivatives as of December 31, 2018.

[7] The fair value of the GMWB and GMAB embedded derivatives included $1.6 billion of individual contracts in a liability position and $107 million of individual contracts in an asset position as of September 30, 2019.

[8] The fair value of the GMWB and GMAB embedded derivatives included $646 million of individual contracts in a liability position and $318 million of individual contracts in an asset position as of December 31, 2018.