Fair Values of Assets and Liabilities (Level 3 rollforwards-Liabilities) (Details 3) - Ameriprise Financial [Member] - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 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
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		3		0
Issues		5		8
Balance, at the end of the period		8		8
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		585	493	601	464
Total gains (losses) included in net income	[1]	26	21	1	40
Issues		21	22	41	44
Settlements		(12)	(9)	(23)	(21)
Balance, at the end of the period		620	527	620	527
Changes in unrealized (gains) losses relating to liabilities held at end of period	[1]	26	21	1	40
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		(329)	188	(49)	614
Total gains (losses) included in net income	[2]	(175)	10	(531)	(489)
Issues		84	77	167	154
Settlements		(5)	(3)	(12)	(7)
Balance, at the end of the period		(425)	272	(425)	272
Changes in unrealized (gains) losses relating to liabilities held at end of period	[2]	(173)	20	521	(464)
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		259	681	552	1,078
Total gains (losses) included in net income		(149)	31	(530)	(449)
Issues		110	99	216	198
Settlements		(17)	(12)	(35)	(28)
Balance, at the end of the period		203	799	203	799
Changes in unrealized (gains) losses relating to liabilities held at end of period		(147)	41	(520)	(424)
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		28	13	28	13
Total gains (losses) included in net income	[3]	1	1	1	1
Balance, at the end of the period		$ 29	$ 14	$ 29	$ 14

[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.