Shareholders' Equity - OCI Components (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pretax
Total other comprehensive income (loss)	$ 1,129	$ (634)	$ 845	$ (388)
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	(237)	143	(180)	94
Net of Tax
Arising during the period	892	(521)	663	(317)
Reclassification to net income	0	30	2	23
Total other comprehensive income (loss), net of tax	892	(491)	665	(294)
Net unrealized gains (losses) on securities
Pretax
Total other comprehensive income (loss)	1,296	(802)	896	(690)
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	(291)	179	(204)	159
Net of Tax
Arising during the period	1,005	(653)	690	(554)
Reclassification to net income	0	30	2	23
Total other comprehensive income (loss), net of tax	1,005	(623)	692	(531)
Net unrealized gains (losses) on securities arising during the period
Pretax
Arising during the period	1,312	(854)	896	(727)
Income Tax Benefit (Expense)
Arising during the period	(293)	190	(203)	167
Net of Tax
Arising during the period	1,019	(664)	693	(560)
Reclassification of net (gains) losses on securities included in net income
Pretax
Reclassification to net income	2	38	4	29
Income Tax Benefit (Expense)
Reclassification to net income	(2)	(8)	(2)	(6)
Net of Tax
Reclassification to net income	0	30	2	23
Impact of benefit reserves and reinsurance recoverables
Pretax
Arising during the period	(18)	14	(4)	8
Income Tax Benefit (Expense)
Arising during the period	4	(3)	1	(2)
Net of Tax
Arising during the period	(14)	11	(3)	6
Net unrealized gains (losses) on derivatives
Pretax
Arising during the period			0	3
Reclassification to net income	(1)	0	(1)	0
Total other comprehensive income (loss)	(1)	0	(1)	3
Income Tax Benefit (Expense)
Arising during the period			0	(1)
Reclassification to net income	1	0	1	0
Total other comprehensive income (loss)	1	0	1	(1)
Net of Tax
Arising during the period	0	0	0	2
Reclassification to net income	0	0	0	0
Total other comprehensive income (loss), net of tax	0	0	0	2
Effect of changes in discount rate assumptions on certain long-duration contracts
Pretax
Total other comprehensive income (loss)	(188)	221	(21)	213
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	41	(47)	5	(45)
Net of Tax
Arising during the period	(147)	174	(16)	168
Reclassification to net income	0	0	0	0
Total other comprehensive income (loss), net of tax	(147)	174	(16)	168
Effect of changes in instrument-specific credit risk on MRBs
Pretax
Total other comprehensive income (loss)	(63)	23	(98)	68
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	14	(5)	21	(15)
Net of Tax
Arising during the period	(49)	18	(77)	53
Reclassification to net income	0	0	0	0
Total other comprehensive income (loss), net of tax	(49)	18	(77)	53
Foreign currency translation
Pretax
Total other comprehensive income (loss)	85	(76)	69	18
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	(2)	16	(3)	(4)
Net of Tax
Arising during the period	83	(60)	66	14
Reclassification to net income	0	0	0	0
Total other comprehensive income (loss), net of tax	$ 83	$ (60)	$ 66	$ 14

Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent.

Name:	us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-SubTopic 10
-Topic 220
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482739/220-10-55-15

+ Details

Name:	us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of tax expense (benefit) allocated to other comprehensive income (loss) before reclassification adjustment from accumulated other comprehensive income (loss).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 12
-SubTopic 10
-Topic 220
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-12

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482765/220-10-50-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(19))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

+ Details

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

- Definition

Amount before tax of other comprehensive income (loss) attributable to parent entity.

+ References

+ Details

Name:	us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

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

- Definition

Amount after tax of other comprehensive income (loss) attributable to parent entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 19
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481231/810-10-45-19

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 20
-SubTopic 10
-Topic 810
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481231/810-10-45-20

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (c)(3)
-SubTopic 10
-Topic 810
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-1A

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-6

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1B

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1A

+ Details

Name:	us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Amount of tax expense (benefit) allocated to other comprehensive income (loss) attributable to parent entity.

+ References

+ Details

Name:	us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount before tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

+ References

+ Details

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

- Definition

Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

+ References

+ Details

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

- Definition

Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss).

+ References

+ Details

Name:	us-gaap_ReclassificationFromAociCurrentPeriodTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=amp_AOCIAttributableToParentDebtSecuritiesAvailableForSaleAccumulatedGainLossAndOTTIExcludingInsuranceRelatedImpactMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=amp_AOCIAttributableToParentAccumulatedGainLossDebtSecuritiesAvailableForSaleAndAccumulatedOtherThanTemporaryImpairmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=amp_AOCIAttributableToParentDebtSecuritiesAvailableForSaleInsuranceRelatedImpactMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AociLiabilityForFuturePolicyBenefitParentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AociMarketRiskBenefitInstrumentSpecificCreditRiskParentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedTranslationAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: