Fair Values of Assets and Liabilities - Changes in Level 3 Liabilities (Details) - Ameriprise Financial - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Changes in Level 3 liabilities measured at fair value on a recurring basis
Net increase (decrease) to pretax income from adjustment for nonperformance risk on the fair value of embedded derivatives	$ (1)	$ 17	$ 15	$ 1
Total policyholder account balances, future policy benefits and claims
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	4,280	2,861	4,979	3,516
Total (gains) losses included in net income	2,131	(1,158)	1,632	615
Total gains (losses) included in other comprehensive income (loss)		0		0
Issues	38	42	37	54
Settlements	(363)	(127)	(562)	(251)
Balance, ending	6,086	3,934	6,086	3,934
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	2,127	1,152	1,631	609
Fixed deferred indexed annuity embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	52	51	58	53
Total (gains) losses included in net income	4	(5)	1	5
Total gains (losses) included in other comprehensive income (loss)		0		0
Issues	0	0	0	0
Settlements	(3)	0	(6)	(2)
Balance, ending	53	56	53	56
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	0	0	0	0
IUL embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	1,002	969	1,042	1,002
Total (gains) losses included in net income	134	(67)	143	72
Total gains (losses) included in other comprehensive income (loss)		0		0
Issues	(16)	3	(33)	2
Settlements	(35)	(40)	(67)	(77)
Balance, ending	1,085	999	1,085	999
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	134	66	143	71
Structured variable annuity embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	3,226	1,841	3,879	2,461
Total (gains) losses included in net income	1,993	(1,086)	1,488	538
Total gains (losses) included in other comprehensive income (loss)		0		0
Issues	54	39	70	52
Settlements	(325)	(87)	(489)	(172)
Balance, ending	4,948	2,879	4,948	2,879
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	1,993	1,086	1,488	538
Other Liabilities
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	78	65	71	68
Total (gains) losses included in net income	0	0	0	(6)
Total gains (losses) included in other comprehensive income (loss)		1		(1)
Issues	13	9	32	19
Settlements	(9)	(9)	(21)	(16)
Balance, ending	82	66	82	66
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	$ 0	$ 0	$ 0	$ 0

Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
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Amount of unrealized gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3) and still held.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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Amount of gain (loss) recognized in income from liability 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 liability measured at fair value on recurring basis using unobservable input (level 3).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of issuances of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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