Fair Values of Assets and Liabilities (Level 3 rollforwards-Liabilities) (Details 3) - Ameriprise Financial [Member] - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021		Mar. 31, 2020
Summary of changes in Level 3 liabilities measured at fair value on a recurring basis [Rollforward]
Net increase (decrease) to pretax income from adjustment for nonperformance risk on the fair value of embedded derivatives		$ (167)		$ 1,800
Fixed deferred indexed annuity embedded derivatives [Member]
Summary of changes in Level 3 liabilities measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period		49		43
Total gains (losses) included in net income	[1]	4		(12)
Issues				2
Settlements		(1)
Balance, at the end of the period		52		33
IUL embedded derivatives [Member]
Summary of changes in Level 3 liabilities measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period		935		881
Total gains (losses) included in net income	[1]	29		(145)
Issues		5		8
Settlements		(20)		(19)
Balance, at the end of the period		949		725
Changes in unrealized (gains) losses relating to liabilities held at end of period	[1]	29		(145)
GMWB and GMAB embedded derivatives [Member]
Summary of changes in Level 3 liabilities measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period		2,316		763
Total gains (losses) included in net income	[2]	(1,729)		2,420
Issues		90		88
Settlements		38		5
Balance, at the end of the period		715		3,276
Changes in unrealized (gains) losses relating to liabilities held at end of period	[2]	(1,705)		2,423
Structured annuity embedded derivatives [Member]
Summary of changes in Level 3 liabilities measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period		70
Total gains (losses) included in net income		75	[2]	(3)
Issues		(15)		(6)
Settlements		(6)
Balance, at the end of the period		124		(9)
Policyholder account balances, future policy benefits and claims [Member]
Summary of changes in Level 3 liabilities measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period		3,370		1,687
Total gains (losses) included in net income		(1,621)		2,260
Issues		80		92
Settlements		11		(14)
Balance, at the end of the period		1,840		4,025
Changes in unrealized (gains) losses relating to liabilities held at end of period		(1,676)		2,278
Contingent consideration liabilities [Member]
Summary of changes in Level 3 liabilities measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period		43		44
Total gains (losses) included in net income	[3]			(2)
Issues		2		2
Settlements		(2)		(2)
Balance, at the end of the period		$ 43		$ 42

[1] Included in net investment income in the Consolidated Statements of Operations.

[2] Included in interest credited to fixed accounts in the Consolidated Statements of Operations.

[3] Included in benefits, claims, losses and settlement expenses in the Consolidated Statements of Operations.