SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Statement of Cash Flows) (Details 3) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash Flows from Operating Activities
Net income	$ 463	$ 543	$ 492	$ 395	$ 539	$ 503	$ 462	$ 594	$ 1,893	$ 2,098	$ 1,480
Gain (Loss) on Disposition of Business before Affinity Payment									313
Net Cash Provided by (Used in) Operating Activities									2,341	2,597	1,523
Available-for-Sale securities:
Maturities, sinking fund payments and calls									8,202	6,738	4,957
Purchases									(11,911)	(8,346)	(5,419)
Payments to Acquire Other Investments									(288)	(653)	(519)
Purchase of land, buildings, equipment and software									(143)	(162)	(162)
Proceeds from Divestiture of Businesses									1,100
Other, net									(115)	(56)	(107)
Net cash (used in) provided by investing activities									(3,234)	(587)	(171)
Cash Flows from Financing Activities
Dividends paid to shareholders									(504)	(506)	(491)
Repurchase of common shares									(1,943)	(1,630)	(1,485)
Cash paid for purchased options with deferred premiums									(396)	(228)	(282)
Issuance of long-term debt, net of issuance costs									497
Repayments of long-term debt									(313)	(13)	(11)
Exercise of stock options									3	2	15
Other, net									1	3	(1)
Net cash provided by (used in) financing activities									1,214	(1,263)	(1,785)
Net increase (decrease) in cash and cash equivalents									330	739	(398)
Supplemental Disclosures:
Income taxes paid (received), net									609	538	418
Ameriprise Financial, Inc:
Cash Flows from Operating Activities
Net income									1,893	2,098	1,480
Equity in earnings of subsidiaries									(2,072)	(2,333)	(1,876)
Dividends received from subsidiaries									2,721	2,093	1,589
Gain (Loss) on Disposition of Business before Affinity Payment									313
Other operating activities, primarily with subsidiaries									596	57	712
Net Cash Provided by (Used in) Operating Activities									2,825	1,915	1,905
Available-for-Sale securities:
Maturities, sinking fund payments and calls									204	94	44
Purchases									(1,153)	(222)	(77)
Proceeds from sale of other investments									6		3
Payments to Acquire Other Investments									(12)
Purchase of land, buildings, equipment and software									(42)	(62)	(69)
Proceeds from Divestiture of Businesses									1,138
Contributions to subsidiaries									(368)	(73)	(79)
Return of capital from subsidiaries									18	454	47
Repayment of loans from subsidiaries									2,468	1,623	1,277
Issuance of loans to subsidiaries									(2,457)	(1,768)	(1,337)
Other, net									(65)	2	(91)
Net cash (used in) provided by investing activities									(263)	48	(282)
Cash Flows from Financing Activities
Dividends paid to shareholders									(504)	(506)	(491)
Repurchase of common shares									(1,943)	(1,630)	(1,485)
Cash paid for purchased options with deferred premiums									(107)	(20)	(19)
Issuance of long-term debt, net of issuance costs									497
Repayments of long-term debt									(313)	(13)	(11)
Borrowings from subsidiaries									132	472	124
Repayments of borrowings from subsidiaries									(79)	(273)	(15)
Exercise of stock options									3	2	15
Other, net									6	(13)	(1)
Net cash provided by (used in) financing activities									(2,308)	(1,981)	(1,883)
Net increase (decrease) in cash and cash equivalents									254	(18)	(260)
Cash and cash equivalents at beginning of period				$ 476				$ 494	476	494	754
Cash and cash equivalents at end of period	$ 730				$ 476				730	476	494
Supplemental Disclosures:
Interest paid on debt									123	126	128
Income taxes paid (received), net									(109)	(27)	(368)
Non-cash dividends from subsidiaries									$ 81	$ 195	$ 109