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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Aggregate Liquidation Preference Shares	$ 1,000.0	$ 775.0	$ 775.0
Preferred Stock Issuance Cost	$ 29.5	$ 21.5	$ 21.5

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- Definition

Aggregate liquidation preferences

+ References

No definition available.

+ Details

Name:	ahl_AggregateLiquidationPreferenceShares
Namespace Prefix:	ahl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- Definition

Preferred stock issuance cost

+ References

No definition available.

+ Details

Name:	ahl_PreferredStockIssuanceCost
Namespace Prefix:	ahl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration