Fair Value, Option, Fair Value Carrying Amount, Assets

No definition available.

Name:	ahl_FairValueOptionFairValueCarryingAmountAssets
Namespace Prefix:	ahl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair Value, Option, Unpaid Principal Balance, Assets

+ References

No definition available.

+ Details

Name:	ahl_FairValueOptionUnpaidPrincipalBalanceAssets
Namespace Prefix:	ahl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans and long-term receivables (other than securities categorized as trading, available-for-sale or held-to-maturity) that have contractual principal amounts and for which the fair value option has been elected.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (d)(1)
-URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612

+ Details

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

- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14172-108612

+ Details

Name:	us-gaap_FairValueOptionChangesInFairValueGainLoss1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This item represents the estimated amount of gains or losses included in earnings during the period attributable to changes in instrument-specific credit risk arising from loans and other receivables held as assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14172-108612

+ Details

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

- Definition

This item represents the aggregate fair value of loans held as assets that are 90 days or more past due for which the fair value option has been elected.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (e)(1)
-URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612

+ Details

Name:	us-gaap_FairValueOptionLoansHeldAsAssets90DaysOrMorePastDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the aggregate fair value of loans held as assets that are in nonaccrual status for which the fair value option has been elected, if the entity's policy is to recognize interest income separately from other changes in fair value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (e)(2)
-URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612

+ Details

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

- Definition

For loans held as assets for which the fair value option has been elected, this item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of those loans that are 90 days or more past due, in nonaccrual status, or both.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (e)(3)
-URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612

+ Details

Name:	us-gaap_FairValueOptionLoansHeldAsAssetsAggregateDifference
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

No definition available.

+ Details

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

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_LoansReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis=us-gaap_LoansInsuredOrGuaranteedByUsGovernmentAuthoritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MortgagesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_GainLossOnInvestmentsMember1
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=ahl_DebtSecuritiesTradingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_InvestmentIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=ahl_InvestmentFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=ahl_FuturePolicyBenefitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_InsuranceContractRightsAndObligationsFairValueOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Fair Value - Fair Value Option (Details) - USD ($)	3 Months Ended		6 Months Ended
Fair Value - Fair Value Option (Details) - USD ($)	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	$ (1,143,000,000)	$ 502,000,000	$ (2,104,000,000)	$ 476,000,000
Mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option, loans, 90 days or more past due					$ 0
Total gains (losses)	(1,149,000,000)	0	(2,065,000,000)	0
Unpaid principal balance	29,883,000,000		29,883,000,000		15,000,000
Mark to fair value	(1,623,000,000)		(1,623,000,000)		2,000,000
Fair value	28,260,000,000		28,260,000,000		$ 17,000,000
Fair Value, Option, Credit Risk, Gains (Losses) on Assets	(34,000,000)	0	(52,000,000)	0
Residential mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option, loans, 90 days or more past due	545,000,000		545,000,000
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status	207,000,000		207,000,000
Unpaid principal balance	581,000,000		581,000,000
Fair value	545,000,000		545,000,000
Fair Value, Option, Loans Held as Assets, Aggregate Difference	(36,000,000)		(36,000,000)
Residential mortgage loans \| Loans Insured or Guaranteed by US Government Authorities
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option, loans, 90 days or more past due	338,000,000		338,000,000
Mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option, loans, 90 days or more past due	132,000,000		132,000,000
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status	81,000,000		81,000,000
Unpaid principal balance	127,000,000		127,000,000
Fair value	81,000,000		81,000,000
Fair Value, Option, Loans Held as Assets, Aggregate Difference	(46,000,000)		(46,000,000)
Investment related gains (losses) \| Trading securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	(161,000,000)	61,000,000	(368,000,000)	(8,000,000)
Net investment income \| Investment funds
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	36,000,000	495,000,000	56,000,000	435,000,000
Future policy and other policy benefits \| Future policy benefits
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	$ 131,000,000	$ (54,000,000)	$ 273,000,000	$ 49,000,000