Financing Receivables - Credit Quality Information - Syndicated Loans (Details) - USD ($)	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing receivables - credit quality information
Loan write-offs	$ 8,000,000	$ 4,000,000	$ 4,000,000
Commercial Loans
Financing receivables - credit quality information
Loan write-offs	4,000,000	2,000,000	$ 3,000,000
Commercial Loans \| Syndicated loans
Financing receivables - credit quality information
Recorded investment	92,000,000	145,000,000
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	52,000,000	42,000,000
Originated in fiscal year before latest fiscal year	12,000,000	9,000,000
Originated two years before latest fiscal year	0	44,000,000
Originated three years before latest fiscal year	14,000,000	11,000,000
Originated four years before latest fiscal year	3,000,000	25,000,000
Originated five or more years before latest fiscal year	11,000,000	14,000,000
Total	92,000,000	145,000,000
Commercial Loans \| Syndicated loans \| Risk 5
Financing receivables - credit quality information
Recorded investment	0	1,000,000
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	0	0
Originated in fiscal year before latest fiscal year	0	1,000,000
Originated two years before latest fiscal year	0	0
Originated three years before latest fiscal year	0	0
Originated four years before latest fiscal year	0	0
Originated five or more years before latest fiscal year	0	0
Total	0	1,000,000
Commercial Loans \| Syndicated loans \| Risk 4
Financing receivables - credit quality information
Recorded investment	2,000,000	3,000,000
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	0	0
Originated in fiscal year before latest fiscal year	0	0
Originated two years before latest fiscal year	0	0
Originated three years before latest fiscal year	0	1,000,000
Originated four years before latest fiscal year	0	2,000,000
Originated five or more years before latest fiscal year	2,000,000	0
Total	2,000,000	3,000,000
Commercial Loans \| Syndicated loans \| Risk 3
Financing receivables - credit quality information
Recorded investment	12,000,000	28,000,000
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	1,000,000	2,000,000
Originated in fiscal year before latest fiscal year	1,000,000	0
Originated two years before latest fiscal year	0	12,000,000
Originated three years before latest fiscal year	8,000,000	2,000,000
Originated four years before latest fiscal year	1,000,000	2,000,000
Originated five or more years before latest fiscal year	1,000,000	10,000,000
Total	12,000,000	28,000,000
Commercial Loans \| Syndicated loans \| Risk 2
Financing receivables - credit quality information
Recorded investment	45,000,000	64,000,000
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	29,000,000	26,000,000
Originated in fiscal year before latest fiscal year	5,000,000	3,000,000
Originated two years before latest fiscal year	0	17,000,000
Originated three years before latest fiscal year	3,000,000	5,000,000
Originated four years before latest fiscal year	0	11,000,000
Originated five or more years before latest fiscal year	8,000,000	2,000,000
Total	45,000,000	64,000,000
Commercial Loans \| Syndicated loans \| Risk 1
Financing receivables - credit quality information
Recorded investment	33,000,000	49,000,000
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	22,000,000	14,000,000
Originated in fiscal year before latest fiscal year	6,000,000	5,000,000
Originated two years before latest fiscal year	0	15,000,000
Originated three years before latest fiscal year	3,000,000	3,000,000
Originated four years before latest fiscal year	2,000,000	10,000,000
Originated five or more years before latest fiscal year	0	2,000,000
Total	33,000,000	49,000,000
Commercial Loans \| Syndicated loans \| Past due
Financing receivables - credit quality information
Recorded investment	0	0
Amortized cost basis by year of origination and loan-to-value ratio
Total	$ 0	$ 0

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amortized cost excluding accrued interest, of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost excluding accrued interest, of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost excluding accrued interest, of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost excluding accrued interest, of financing receivable originated in current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost excluding accrued interest, of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost excluding accrued interest of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-29

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=amp_CommercialRealEstateAndCommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=amp_SyndicatedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=amp_InternalRiskRating5Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=amp_InternalRiskRating4Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=amp_InternalRiskRating3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=amp_InternalRiskRating2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=amp_InternalRiskRating1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: