Fair Values of Assets and Liabilities (Level 3 rollforwards-Assets) (Details 2) - Ameriprise Financial [Member] - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
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		$ 750	$ 913
Total gains (losses) included in other comprehensive income (loss)		(6)	15
Purchases		5
Settlements		(15)	(81)
Balance, at the end of the period		734	847
Changes in unrealized gains (losses) OCI relating to assets held at end of period		(6)
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		17	136
Settlements			(4)
Transfers out of Level 3			(95)
Balance, at the end of the period		17	37
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		19	6
Total gains (losses) included in net income		(1)
Total gains (losses) included in other comprehensive income (loss)		(1)
Balance, at the end of the period		17	6
Changes in unrealized gains (losses) relating to assets held at end of period		(1)
Changes in unrealized gains (losses) OCI relating to assets held at end of period		(1)
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		786	1,075
Total gains (losses) included in net income	[1]	(1)
Total gains (losses) included in other comprehensive income (loss)		(7)	15
Purchases		5
Settlements		(15)	(85)
Transfers out of Level 3			(115)
Balance, at the end of the period		768	$ 890
Changes in unrealized gains (losses) relating to assets held at end of period	[1]	(1)
Changes in unrealized gains (losses) OCI relating to assets held at end of period		$ (7)

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