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, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Available-for-Sale Securities
Summary of changes in Level 3 assets measured at fair value on a recurring basis
Balance, beginning	$ 618	$ 397	$ 544	$ 813
Total gains (losses) included in Net income	0	0	(1)	(1)
Total gains (losses) included in Other comprehensive income (loss)	(17)	(3)	(50)	(6)
Purchases	283	9	571	154
Sales		(1)		(1)
Issues		0		0
Settlements	(58)	(45)	(91)	(75)
Transfers into Level 3		170		170
Transfers out of Level 3	(153)		(300)	(527)
Balance, ending	673	527	673	527
Changes in unrealized gains (losses) included in net income relating to assets held at end of period			(1)	(1)
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period	(17)	(4)	(49)	(4)
Corporate Debt Securities
Summary of changes in Level 3 assets measured at fair value on a recurring basis
Balance, beginning	458	391	502	772
Total gains (losses) included in Net income	0	(1)	(1)	(1)
Total gains (losses) included in Other comprehensive income (loss)	(13)	(3)	(46)	(6)
Purchases	16	9	39	76
Sales		0		0
Issues		0		0
Settlements	(58)	(44)	(91)	(73)
Transfers into Level 3		168		168
Transfers out of Level 3	0		0	(416)
Balance, ending	403	520	403	520
Changes in unrealized gains (losses) included in net income relating to assets held at end of period			(1)	0
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period	(13)	(4)	(45)	(4)
Residential Mortgage Backed Securities
Summary of changes in Level 3 assets measured at fair value on a recurring basis
Balance, beginning	139		0	9
Total gains (losses) included in Net income	0		0	0
Total gains (losses) included in Other comprehensive income (loss)	(4)		(4)	0
Purchases	250		389	78
Sales				0
Issues				0
Settlements	0		0	0
Transfers into Level 3				0
Transfers out of Level 3	(139)		(139)	(87)
Balance, ending	246	0	246	0
Changes in unrealized gains (losses) included in net income relating to assets held at end of period			0	0
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period	(4)		(4)	0
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	21	6	7	32
Total gains (losses) included in Net income	0	1	0	0
Total gains (losses) included in Other comprehensive income (loss)	0	0	0	0
Purchases	17	0	31	0
Sales		(1)		(1)
Issues		0		0
Settlements	0	(1)	0	(2)
Transfers into Level 3		2		2
Transfers out of Level 3	(14)		(14)	(24)
Balance, ending	24	7	24	7
Changes in unrealized gains (losses) included in net income relating to assets held at end of period			0	(1)
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 Annuity Ceded Embedded Derivatives
Summary of changes in Level 3 assets measured at fair value on a recurring basis
Balance, beginning	49	0	59	0
Total gains (losses) included in Net income	(2)	0	(10)	0
Total gains (losses) included in Other comprehensive income (loss)	0	0	0	0
Purchases	0	0	0	0
Sales		0		0
Issues		57		57
Settlements	0	(1)	(2)	(1)
Transfers into Level 3		0		0
Transfers out of Level 3	0		0	0
Balance, ending	47	56	47	56
Changes in unrealized gains (losses) included in net income relating to assets held at end of period			0	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.

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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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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 issuances 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 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 sale 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 transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

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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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