Fair Values of Assets and Liabilities (Level 3 rollforwards-Assets) (Details 2) - Ameriprise Financial [Member] - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Corporate debt securities [Member]
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period		$ 913	$ 1,139
Total gains (losses) included in net income			(1)
Total gains (losses) included in other comprehensive income (loss)		15	(14)
Settlements		(81)	(29)
Balance, at the end of the period		847	1,095
Changes in unrealized gains (losses) relating to assets held at end of period			(1)
Residential mortgage backed securities [Member]
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period		136	155
Total gains (losses) included in other comprehensive income (loss)			(2)
Settlements		(4)	(7)
Transfers out of Level 3		(95)
Balance, at the end of the period		37	146
Commercial mortgage backed securities [Member]
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period		20
Transfers out of Level 3		(20)
Balance, at the end of the period		0
Asset backed securities [Member]
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period		6	7
Purchases			10
Balance, at the end of the period		6	17
Total available-for-sale securities [Member]
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period		1,075	1,301
Total gains (losses) included in net income	[1]		(1)
Total gains (losses) included in other comprehensive income (loss)		15	(16)
Purchases			10
Settlements		(85)	(36)
Transfers out of Level 3		(115)
Balance, at the end of the period		$ 890	1,258
Changes in unrealized gains (losses) relating to assets held at end of period	[1]		$ (1)

[1] Included in net investment income in the Consolidated Statements of Operations.