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, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Transfers from Level 1 to Level 2, liabilities		$ 0	$ 0	$ 0	$ 0
Transfers from Level 2 to Level 1, liabilities		0	0	0	0
Net increase (decrease) to pretax income from embedded derivative liability		(37)	8	(91)	295
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		527	408	464	364
Total gains (losses) included in net income	[1]	35	12	75	8
Issues		26	25	70	86
Settlements		(11)	(7)	(32)	(20)
Balance, at the end of the period		577	438	577	438
Changes in unrealized (gains) losses relating to liabilities held at end of period	[1]	35	12	75	8
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		272	1,965	614	851
Total gains (losses) included in net income	[2]	(309)	(280)	(798)	708
Issues		84	77	238	215
Settlements		(2)	(6)	(9)	(18)
Balance, at the end of the period		45	1,756	45	1,756
Changes in unrealized (gains) losses relating to liabilities held at end of period	[2]	(307)	(267)	(771)	830
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		799	2,373	1,078	1,215
Total gains (losses) included in net income		(274)	(268)	(723)	716
Issues		110	102	308	301
Settlements		(13)	(13)	(41)	(38)
Balance, at the end of the period		622	2,194	622	2,194
Changes in unrealized (gains) losses relating to liabilities held at end of period		(272)	(255)	(696)	838
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		14	0	13	0
Total gains (losses) included in net income	[3]			1
Issues		13	13	13	13
Balance, at the end of the period		$ 27	$ 13	$ 27	$ 13

[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.