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, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
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
Summary of changes in Level 3 liabilities measured at fair value on a recurring basis [Rollforward]
Gain (Loss) on Embedded Derivative, Net		(58)	(37)	(10)	(91)
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		8		0
Issues		3		11
Balance, at the end of the period		11		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		620	527	601	464
Total gains (losses) included in net income	[1]	55	35	56	75
Issues		24	26	65	70
Settlements		(15)	(11)	(38)	(32)
Balance, at the end of the period		684	577	684	577
Changes in unrealized (gains) losses relating to liabilities held at end of period	[1]	55	35	56	75
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		(425)	272	(49)	614
Total gains (losses) included in net income	[2]	(344)	(309)	(875)	(798)
Issues		90	84	257	238
Settlements		(7)	(2)	(19)	(9)
Balance, at the end of the period		(686)	45	(686)	45
Changes in unrealized (gains) losses relating to liabilities held at end of period	[2]	(347)	(307)	(868)	(771)
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		203	799	552	1,078
Total gains (losses) included in net income		(289)	(274)	(819)	(723)
Issues		117	110	333	308
Settlements		(22)	(13)	(57)	(41)
Balance, at the end of the period		9	622	9	622
Changes in unrealized (gains) losses relating to liabilities held at end of period		(292)	(272)	(812)	(696)
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		29	14	28	13
Total gains (losses) included in net income	[3]			1	1
Issues			13		13
Balance, at the end of the period		$ 29	$ 27	$ 29	$ 27

[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.