SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Statement of Cash Flows) (Details 3) - 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
Cash Flows from Operating Activities
Net income	$ 177	$ (140)	$ (539)	$ 2,036	$ 463	$ 543	$ 492	$ 395	$ 1,534	$ 1,893	$ 2,098
Gain (Loss) on Disposition of Business before Affinity Payment										313
Net Cash Provided by (Used in) Operating Activities									4,623	2,341	2,597
Proceeds from sales									1,708	242	435
Available-for-Sale securities:
Maturities, sinking fund payments and calls									9,554	8,202	6,738
Purchases									(13,525)	(11,911)	(8,346)
Payments to Acquire Other Investments									(284)	(288)	(653)
Purchase of land, buildings, equipment and software									(147)	(143)	(162)
Proceeds from Divestiture of Businesses										1,100
Other, net									17	(115)	(56)
Net cash (used in) provided by investing activities									(2,894)	(3,234)	(587)
Cash Flows from Financing Activities
Dividends paid to shareholders									(497)	(504)	(506)
Repurchase of common shares									(1,441)	(1,943)	(1,630)
Cash paid for purchased options with deferred premiums									(211)	(396)	(228)
Issuance of long-term debt, net of issuance costs									496	497
Repayments of long-term debt									(762)	(313)	(13)
Exercise of stock options									3	3	2
Other, net									(10)	1	3
Net cash provided by (used in) financing activities									952	1,214	(1,263)
Net increase (decrease) in cash and cash equivalents									2,690	330	739
Supplemental Disclosures:
Income taxes paid (received), net									236	609	538
Ameriprise Financial, Inc:
Cash Flows from Operating Activities
Net income									1,534	1,893	2,098
Equity in earnings of subsidiaries									(1,727)	(2,072)	(2,333)
Dividends received from subsidiaries									2,018	2,721	2,093
Gain (Loss) on Disposition of Business before Affinity Payment									0	313
Other operating activities, primarily with subsidiaries									282	596	57
Net Cash Provided by (Used in) Operating Activities									2,107	2,825	1,915
Proceeds from sales									922	0	0
Available-for-Sale securities:
Maturities, sinking fund payments and calls									161	204	94
Purchases									(15)	(1,153)	(222)
Proceeds from sale of other investments									0	6	0
Payments to Acquire Other Investments									(12)	(12)
Purchase of land, buildings, equipment and software									(54)	(42)	(62)
Proceeds from Divestiture of Businesses									0	1,138
Contributions to subsidiaries									(416)	(368)	(73)
Return of capital from subsidiaries									131	18	454
Repayment of loans from subsidiaries									3,288	2,468	1,623
Issuance of loans to subsidiaries									(3,174)	(2,457)	(1,768)
Acquisition of surplus loans to subsidiaries									(500)	0	0
Proceeds from Sale of Productive Assets									(2)	0	0
Other, net									0	(65)	2
Net cash (used in) provided by investing activities									333	(263)	48
Cash Flows from Financing Activities
Dividends paid to shareholders									(497)	(504)	(506)
Repurchase of common shares									(1,441)	(1,943)	(1,630)
Cash paid for purchased options with deferred premiums									0	(107)	(20)
Issuance of long-term debt, net of issuance costs									496	497
Repayments of long-term debt									(762)	(313)	(13)
Borrowings from subsidiaries									871	132	472
Repayments of borrowings from subsidiaries									(751)	(79)	(273)
Exercise of stock options									3	3	2
Other, net									(18)	6	(13)
Net cash provided by (used in) financing activities									(2,099)	(2,308)	(1,981)
Net increase (decrease) in cash and cash equivalents									341	254	(18)
Cash and cash equivalents at beginning of period				$ 730				$ 476	730	476	494
Cash and cash equivalents at end of period	$ 1,071				$ 730				1,071	730	476
Supplemental Disclosures:
Interest paid on debt									107	123	126
Income taxes paid (received), net									26	(109)	(27)
Non-cash dividends from subsidiaries									$ 0	$ 81	$ 195