Investments (Net Inv Inc summary) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Summary of net investment income
Net investment income	$ 278	$ 305	$ 655	$ 633
Ameriprise Financial
Summary of net investment income
Investment income on fixed maturities	265	290	531	612
Net realized gains (losses)	11	(3)	81	(22)
Affordable housing partnerships	(23)	(22)	(38)	(36)
Other	7	23	27	45
CIEs
Summary of net investment income
Net investment income	$ 18	$ 17	$ 54	$ 34

Represents the equity method losses related to investments in affordable housing partnerships.

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Represents the income from investments not otherwise specified in financial statements.

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Interest income on fixed maturity securities classified as Available-for-Sale, commercial mortgage loans, policy loans, consumer loans, other investments and cash and cash equivalents; the changes in fair value of trading securities, including seed money, certain derivatives, and assets and liabilities of consolidated investment entities; the pro rata share of net income or loss on equity method investments; and realized gains and losses on the sale of securities and charges for investments determined to be other-than-temporarily impaired.

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The net realized gains or losses on investments during the period.

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Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7(b))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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