Fair Values of Assets and Liabilities - Changes in Level 3 Liabilities (Details) - Ameriprise Financial - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 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	$ (16)	$ (16)
Policyholder account balances, future policy benefits and claims embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	4,979	3,516
Total (gains) losses included in net income	(499)	(543)
Issues	(1)	12
Settlements	(199)	(124)
Balance, ending	4,280	2,861
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	(496)	(543)
Fixed deferred indexed annuities embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	58	53
Total (gains) losses included in net income	(3)	0
Issues	0	0
Settlements	(3)	(2)
Balance, ending	52	51
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	0	0
IUL embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	1,042	1,002
Total (gains) losses included in net income	9	5
Issues	(17)	(1)
Settlements	(32)	(37)
Balance, ending	1,002	969
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	9	5
Structured variable annuity embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	3,879	2,461
Total (gains) losses included in net income	(505)	(548)
Issues	16	13
Settlements	(164)	(85)
Balance, ending	3,226	1,841
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	(505)	(548)
Other liabilities
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	71	68
Total (gains) losses included in net income	0	(6)
Issues	19	10
Settlements	(12)	(7)
Balance, ending	78	65
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	$ 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
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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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
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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).

+ References

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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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Fair value 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
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