Fair Values of Assets and Liabilities - Changes in Level 3 Liabilities (Details) - Ameriprise Financial - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
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	$ (22)	$ 1	$ (23)	$ 20
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	3,934	2,892	3,516	1,933
Total (gains) losses included in Net income	1,063	526	1,678	1,617
Other comprehensive income (loss)		0	0	0
Issues	25	26	79	116
Settlements	(166)	(130)	(417)	(352)
Balance, ending	4,856	3,314	4,856	3,314
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	1,059	523	1,669	1,609
Changes in unrealized (gains) losses in other comprehensive income (loss) relating to liabilities held at period end				0
Fixed deferred indexed annuities embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	56	52	53	49
Total (gains) losses included in Net income	4	3	9	8
Other comprehensive income (loss)		0	0	0
Issues	0	0	0	0
Settlements	(2)	(1)	(4)	(3)
Balance, ending	58	54	58	54
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	0	0	0	0
Changes in unrealized (gains) losses in other comprehensive income (loss) relating to liabilities held at period end				0
IUL embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	999	944	1,002	873
Total (gains) losses included in Net income	111	36	183	169
Other comprehensive income (loss)		0	0	0
Issues	(3)	3	(1)	17
Settlements	(44)	(40)	(121)	(116)
Balance, ending	1,063	943	1,063	943
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	111	36	183	169
Changes in unrealized (gains) losses in other comprehensive income (loss) relating to liabilities held at period end				0
Structured variable annuity embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	2,879	1,896	2,461	1,011
Total (gains) losses included in Net income	948	487	1,486	1,440
Other comprehensive income (loss)		0	0	0
Issues	28	23	80	99
Settlements	(120)	(89)	(292)	(233)
Balance, ending	3,735	2,317	3,735	2,317
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	948	487	1,486	1,440
Changes in unrealized (gains) losses in other comprehensive income (loss) relating to liabilities held at period end				0
Other liabilities
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning	66	69	68	76
Total (gains) losses included in Net income	1	0	(5)	1
Other comprehensive income (loss)		1	1	1
Issues	10	3	29	12
Settlements	(13)	(7)	(29)	(24)
Balance, ending	64	66	64	66
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	$ 0	$ 0	$ 0	0
Changes in unrealized (gains) losses in other comprehensive income (loss) relating to liabilities held at period end				$ 1

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

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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.

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Amount of unrealized gain (loss) recognized in other comprehensive income (OCI) from liability 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 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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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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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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