Investments - Summary of Fixed Maturity Securities by Rating and Concentrations of Risk (Details) - RiverSource Life $ in Millions	9 Months Ended	12 Months Ended
Sep. 30, 2022 USD ($) issuer	Dec. 31, 2021 USD ($) issuer
Investments
Fixed maturity securities rated internally	$ 256	$ 359
Amortized Cost	16,809	14,718
Fair Value	15,389	16,239
AAA
Investments
Amortized Cost	6,199	5,031
Fair Value	5,612	5,107
AA
Investments
Amortized Cost	1,071	757
Fair Value	1,111	932
A
Investments
Amortized Cost	1,443	1,662
Fair Value	1,438	2,013
BBB
Investments
Amortized Cost	7,431	6,293
Fair Value	6,635	7,063
Below investment grade
Investments
Amortized Cost	665	975
Fair Value	593	1,124
Below investment grade \| CLOs
Investments
Amortized Cost	1	1
Fair Value	2	2
Asset backed securities
Investments
Amortized Cost	908	517
Fair Value	$ 892	$ 537
Investment concentration risk \| Credit concentration risk \| Fixed maturities
Investments
Percentage of total	84.00%	85.00%
Fixed maturity securities \| Credit concentration risk
Investments
Percentage of total	100.00%	100.00%
Fixed maturity securities \| Credit concentration risk \| AAA
Investments
Percentage of total	37.00%	31.00%
Fixed maturity securities \| Credit concentration risk \| AA
Investments
Percentage of total	7.00%	6.00%
Fixed maturity securities \| Credit concentration risk \| A
Investments
Percentage of total	9.00%	12.00%
Fixed maturity securities \| Credit concentration risk \| BBB
Investments
Percentage of total	43.00%	44.00%
Fixed maturity securities \| Credit concentration risk \| Below investment grade
Investments
Percentage of total	4.00%	7.00%
Fixed maturity securities \| Credit concentration risk \| GNMA, FNMA and FHLMC mortgage backed securities \| AAA
Investments
Percentage of total	36.00%	40.00%
Shareholders' equity \| Investment concentration risk
Investments
Number of issuers greater than 10% of equity \| issuer	59	4
Issuers greater than 10% of equity	$ 6,300	$ 903
Shareholders' equity \| Investment concentration risk \| Maximum
Investments
Percentage of total	33.00%	14.00%
Shareholders' equity \| Investment concentration risk \| Minimum
Investments
Percentage of total	10.00%	10.00%
Shareholders' equity \| Investment concentration risk \| AAF 2
Investments
Percentage of total	95.00%	16.00%
Issuers greater than 10% of equity	$ 555	$ 289

Fair Value, Concentration of Risk, Number Of Issuers

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- Definition

The amount of fixed maturity investments with credit ratings developed internally based on criteria similar to those used by Standard and Poor's, Moody's or Fitch.

+ References

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amortized cost excluding accrued interest, before allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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- Definition

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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-Publisher FASB
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- Definition

This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties.

+ References

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-Publisher FASB
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- Definition

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.

+ References

No definition available.

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