Fair Values of Assets and Liabilities - Changes in Level 3 Assets (Details) - Ameriprise Financial - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Available-for-Sale securities
Summary of changes in Level 3 assets measured at fair value on a recurring basis
Balance, beginning	$ 449	$ 618	$ 411	$ 544
Total gains (losses) included in Net income		0	0	(1)
Total gains (losses) included in Other comprehensive income (loss)	(3)	(17)	(2)	(50)
Purchases	36	283	114	571
Settlements	(18)	(58)	(59)	(91)
Transfers out of Level 3		(153)		(300)
Balance, ending	464	673	464	673
Changes in unrealized gains (losses) included in net income relating to assets held at end of period				(1)
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period	(4)	(17)	(3)	(49)
Corporate debt securities
Summary of changes in Level 3 assets measured at fair value on a recurring basis
Balance, beginning	446	458	405	502
Total gains (losses) included in Net income		0	0	(1)
Total gains (losses) included in Other comprehensive income (loss)	(3)	(13)	(2)	(46)
Purchases	36	16	114	39
Settlements	(18)	(58)	(56)	(91)
Transfers out of Level 3		0		0
Balance, ending	461	403	461	403
Changes in unrealized gains (losses) included in net income relating to assets held at end of period				(1)
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period	(4)	(13)	(3)	(45)
Residential mortgage backed securities
Summary of changes in Level 3 assets measured at fair value on a recurring basis
Balance, beginning		139		0
Total gains (losses) included in Net income		0		0
Total gains (losses) included in Other comprehensive income (loss)		(4)		(4)
Purchases		250		389
Settlements		0		0
Transfers out of Level 3		(139)		(139)
Balance, ending		246		246
Changes in unrealized gains (losses) included in net income relating to assets held at end of period				0
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period		(4)		(4)
Commercial mortgage backed securities
Summary of changes in Level 3 assets measured at fair value on a recurring basis
Balance, beginning				35
Total gains (losses) included in Net income				0
Total gains (losses) included in Other comprehensive income (loss)				0
Purchases				112
Settlements				0
Transfers out of Level 3				(147)
Balance, ending		0		0
Changes in unrealized gains (losses) included in net income relating to assets held at end of period				0
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period				0
Asset backed securities
Summary of changes in Level 3 assets measured at fair value on a recurring basis
Balance, beginning	3	21	6	7
Total gains (losses) included in Net income		0	0	0
Total gains (losses) included in Other comprehensive income (loss)	0	0	0	0
Purchases	0	17	0	31
Settlements	0	0	(3)	0
Transfers out of Level 3		(14)		(14)
Balance, ending	3	24	3	24
Changes in unrealized gains (losses) included in net income relating to assets held at end of period				0
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period	0	0	0	0
Fixed deferred indexed annuities ceded embedded derivatives
Summary of changes in Level 3 assets measured at fair value on a recurring basis
Balance, beginning	49	49	48	59
Total gains (losses) included in Net income		(2)	2	(10)
Total gains (losses) included in Other comprehensive income (loss)	0	0	0	0
Purchases	0	0	0	0
Settlements	(1)	0	(2)	(2)
Transfers out of Level 3		0		0
Balance, ending	48	47	48	47
Changes in unrealized gains (losses) included in net income relating to assets held at end of period				0
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period	$ 0	$ 0	$ 0	$ 0

Amount of unrealized gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.

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Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

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-Topic 820
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Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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