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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
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	$ (123)	$ (138)	$ 446
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		2,569	4,061	3,370	1,687
Total gains (losses) included in net income		(37)	(240)	(1,023)	1,967
Issues		88	105	256	316
Settlements		4	(4)	21	(48)
Balance, ending		2,624	3,922	2,624	3,922
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period		(46)	(233)	(1,185)	1,989
Fixed deferred indexed annuity embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning		54	41	49	43
Total gains (losses) included in net income	[1]	1	3	7	(2)
Issues					3
Settlements		(1)		(2)
Balance, ending		54	44	54	44
IUL embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning		928	882	935	881
Total gains (losses) included in net income	[1]	14	50	51	53
Issues			15	4	53
Settlements		(25)	(21)	(73)	(61)
Balance, ending		917	926	917	926
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	[1]	14	50	51	53
GMWB and GMAB embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning		1,373	3,129	2,316	763
Total gains (losses) included in net income	[2]	(69)	(296)	(1,273)	1,900
Issues		95	93	274	267
Settlements		37	17	119	13
Balance, ending		1,436	2,943	1,436	2,943
Changes in unrealized (gains) losses in net income relating to liabilities held at end of period	[2]	(60)	(283)	(1,236)	1,936
Structured variable annuity embedded derivatives
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning		214	9	70	0
Total gains (losses) included in net income	[2]	17	3	192	16
Issues		(7)	(3)	(22)	(7)
Settlements		(7)		(23)
Balance, ending		217	9	217	9
Contingent consideration liabilities
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance, beginning		44	48	43	44
Total gains (losses) included in net income	[3]	(5)	(11)	(4)	(12)
Issues		5	5	11	15
Settlements		(4)	(2)	(10)	(7)
Balance, ending		$ 40	$ 40	$ 40	$ 40

[1] Included in interest credited to fixed accounts in the Consolidated Statements of Operations.

[2] Included in benefits, claims, losses and settlement expenses in the Consolidated Statements of Operations.

[3] Included in general and administrative expense in the Consolidated Statements of Operations.