SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Statement of Operations) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues
Other revenues									$ 283	$ 269	$ 208
Gain on disposal of business									0	213	0
Total revenues									11,958	13,103	12,924
Banking and deposit interest expense									59	136	89
Total net revenues	$ 3,183	$ 3,003	$ 2,712	$ 3,001	$ 3,287	$ 3,317	$ 3,245	$ 3,118	11,899	12,967	12,835
Expenses
Benefits, claims, losses and settlement expenses									1,806	2,576	2,302
Distribution expenses									4,059	3,810	3,637
Interest and debt expense									162	214	245
General and administrative expense									3,120	3,287	3,171
Total expenses									10,068	10,735	10,351
Income tax benefit									297	339	386
Net income	$ 177	$ (140)	$ (539)	$ 2,036	$ 463	$ 543	$ 492	$ 395	1,534	1,893	2,098
Other comprehensive income (loss), net of tax									367	553	(519)
Total comprehensive income									1,901	2,446	1,579
Management and financial advice fees [Member]
Revenues
Management and financial advice fees									(7,368)	(7,015)	(6,776)
Ameriprise Financial, Inc:
Revenues
Net investment income									23	9	34
Other revenues									15	14	4
Gain on disposal of business									0	213	0
Total revenues									38	235	37
Banking and deposit interest expense									3	9	7
Total net revenues									35	226	30
Expenses
Benefits, claims, losses and settlement expenses									0	49	4
Distribution expenses									12	24	4
Interest and debt expense									105	126	120
General and administrative expense									198	244	210
Total expenses									315	443	338
Pretax loss before equity in earnings of subsidiaries									(280)	(217)	(308)
Income tax benefit									(87)	(38)	(73)
Loss before equity in earnings of subsidiaries									(193)	(179)	(235)
Equity in earnings of subsidiaries									1,727	2,072	2,333
Net income									1,534	1,893	2,098
Other comprehensive income (loss), net of tax									367	553	(519)
Total comprehensive income									1,901	2,446	1,579
Ameriprise Financial, Inc: | Management and financial advice fees [Member]
Revenues
Management and financial advice fees									$ 0	$ (1)	$ (1)