Fair Values of Assets and Liabilities (Level 3 rollforwards-Liabilities) (Details 3) - Ameriprise Financial [Member] - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Transfers from Level 1 to Level 2, liabilities		$ 0	$ 0
Transfers from Level 2 to Level 1, liabilities		0	0
Net increase (decrease) to pretax income from embedded derivative liability		33	(45)
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		0
Issues		3
Balance, at the end of the period		3
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		601	464
Total gains (losses) included in net income	[1]	(25)	19
Issues		20	22
Settlements		(11)	(12)
Balance, at the end of the period		585	493
Changes in unrealized (gains) losses relating to liabilities held at end of period	[1]	(25)	19
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		(49)	614
Total gains (losses) included in net income	[2]	(356)	(499)
Issues		83	77
Settlements		(7)	(4)
Balance, at the end of the period		(329)	188
Changes in unrealized (gains) losses relating to liabilities held at end of period	[2]	(348)	(484)
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		552	1,078
Total gains (losses) included in net income		(381)	(480)
Issues		106	99
Settlements		(18)	(16)
Balance, at the end of the period		259	681
Changes in unrealized (gains) losses relating to liabilities held at end of period		(373)	(465)
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
Balance, at the end of the period		$ 28	$ 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.