XML 46 R40.htm IDEA: XBRL DOCUMENT
v3.23.2

Investments Investments - Loan-to-Value Ratios (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Commercial mortgage loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Fair market value, trading | $ 295.0 | $ 312.1
Commercial mortgage loans | Less than 50 Percent |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Fair market value, trading | 47.5 | 41.1
Commercial mortgage loans | 50 to 60 Percent |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Fair market value, trading | 227.3 | 248.3
Commercial mortgage loans | 61 to 70 Percent |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Fair market value, trading | 20.2 | 22.7
Middle market loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Fair market value, trading | 102.1 | 106.9
Middle market loans | Less than 50 Percent |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Fair market value, trading | 63.5 | 63.5
Middle market loans | 50 to 60 Percent |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Fair market value, trading | 23.3 | 16.4
Middle market loans | 61 to 70 Percent |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Fair market value, trading | $ 15.3 | $ 27.0

X
- 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_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_TradingSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanToValueAxis=ahl_DebttoValueRatioLessthan50PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanToValueAxis=ahl_DebttoValueRatio50to60PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanToValueAxis=ahl_DebttoValueRatio61to70PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=ahl_MiddlemarketloansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |