Fair Values of Assets and Liabilities (Level 3 rollforwards-Liabilities) (Details 3) - Ameriprise Financial [Member] - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
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		$ 85	$ (58)	$ (29)	$ (10)
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		31	8	14	0
Total gains (losses) included in net income	[1]			3
Issues		6	3	20	11
Balance, at the end of the period		37	11	37	11
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		819	620	628	601
Total gains (losses) included in net income	[1]	(5)	55	153	56
Issues		25	24	92	65
Settlements		(17)	(15)	(51)	(38)
Balance, at the end of the period		822	684	822	684
Changes in unrealized (gains) losses relating to liabilities held at end of period	[1]	(5)	55	153	56
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		696	(425)	328	(49)
Total gains (losses) included in net income	[2]	663	(344)	866	(875)
Issues		96	90	266	257
Settlements		(3)	(7)	(8)	(19)
Balance, at the end of the period		1,452	(686)	1,452	(686)
Changes in unrealized (gains) losses relating to liabilities held at end of period	[2]	660	(347)	859	(868)
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		1,546	203	970	552
Total gains (losses) included in net income		658	(289)	1,022	(819)
Issues		127	117	378	333
Settlements		(20)	(22)	(59)	(57)
Balance, at the end of the period		2,311	9	2,311	9
Changes in unrealized (gains) losses relating to liabilities held at end of period		655	(292)	1,012	(812)
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		31	29	30	28
Total gains (losses) included in net income	[3]	(5)		(4)	1
Balance, at the end of the period		$ 26	$ 29	$ 26	$ 29

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

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

[3] Included in general and administrative expense in the Consolidated Statements of Operations.