Depositary Share Dividend

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- Definition

Preferred Stock, Dividend Rate, Depositary Share Fractional Interest (1/1000th of Preference Share)

+ References

No definition available.

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- Definition

Depositary Share Dividend Rate Fractional Interest, 7.00%

+ References

No definition available.

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- Definition

Loss Contigency Industry Amount Incurred

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No definition available.

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- Definition

Date the declared dividend will be paid, in YYYY-MM-DD format.

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- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

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- Definition

Date the dividend to be paid was declared, in YYYY-MM-DD format.

+ References

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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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- Definition

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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- Definition

The percentage rate used to calculate dividend payments on preferred stock.

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- Definition

The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.

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- Definition

Value of the difference between preference in liquidation and the par or stated values of the preferred shares.

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Subsequent Events - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions								1 Months Ended	12 Months Ended
	Feb. 28, 2025	Jan. 01, 2025	Nov. 29, 2024	Nov. 26, 2024	Aug. 13, 2019	Sep. 20, 2016	May 02, 2013	Jan. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Mar. 01, 2025	Jan. 02, 2025
Subsequent Event [Line Items]
Payments of Ordinary Dividends, Common Stock									$ 195.0	$ 40.3	$ 40.0
Preference shares liquidation preference, value				$ 225.0	$ 250.0
Forecast \| California Wildfires \| Minimum
Subsequent Event [Line Items]
Loss contingency, estimate of possible loss												$ 50.0
Forecast \| California Wildfires \| Maximum
Subsequent Event [Line Items]
Loss contingency, estimate of possible loss												$ 75.0
5.950% Preference Shares (AHL PRC)
Subsequent Event [Line Items]
Preferred Stock, Dividend Rate, Percentage			5.95%				5.95%		5.95%	5.95%
Redemption price per share							$ 25		$ 25	$ 25
Preference shares liquidation preference, value							$ 275.0
5.625% Preference Shares (AHL PRD)
Subsequent Event [Line Items]
Preferred Stock, Dividend Rate, Percentage						5.625%			5.625%	5.625%
Redemption price per share						$ 25			$ 25	$ 25
Preference shares liquidation preference, value						$ 250.0
5.625% Preference Shares (AHL PRE)
Subsequent Event [Line Items]
Preferred Stock, Dividend Rate, Percentage					5.625%				5.625%	5.625%
Depositary share interest of 1/1000th in each 5.625%					0.001%
Depositary share dividend									$ 1.40624
Redemption price per share					$ 25				$ 25,000	$ 25,000
7.00% Preference Shares, rep by Dep Shares (AHL PRF)
Subsequent Event [Line Items]
Preferred Stock, Dividend Rate, Percentage				7.00%					7.00%	7.00%
Depositary share interest of 1/1000th in each 5.625%				0.001%
Redemption price per share				$ 25					$ 25,000	$ 25,000
Subsequent Event \| California Wildfires \| Minimum
Subsequent Event [Line Items]
Loss contingency industry amount incurred								$ 35,000.0
Subsequent Event \| California Wildfires \| Maximum
Subsequent Event [Line Items]
Loss contingency industry amount incurred								$ 45,000.0
Subsequent Event \| 5.950% Preference Shares (AHL PRC)
Subsequent Event [Line Items]
Preferred Stock, Dividend Rate, Percentage		5.95%
Redemption price per share													$ 25
Preference shares liquidation preference, value													$ 275.0
Subsequent Event \| 5.625% Preference Shares (AHL PRD)
Subsequent Event [Line Items]
Preferred Stock, Dividend Rate, Percentage	5.625%
Dividend, in usd per share	$ 0.3516
Subsequent Event \| 5.625% Preference Shares (AHL PRD) \| S2025Q1SeriesEDividends
Subsequent Event [Line Items]
Payable Date	Apr. 01, 2025
Dividends Payable, Date Declared	Mar. 15, 2025
Subsequent Event \| 5.625% Preference Shares (AHL PRE)
Subsequent Event [Line Items]
Preferred Stock, Dividend Rate, Percentage	5.625%
Dividend, in usd per share	$ 351.56
Depositary share interest of 1/1000th in each 5.625%	0.001%
Depositary share dividend	$ 0.3516
Subsequent Event \| 5.625% Preference Shares (AHL PRE) \| S2025Q1SeriesFDividends
Subsequent Event [Line Items]
Payable Date	Apr. 01, 2025
Dividends Payable, Date Declared	Mar. 15, 2025
Subsequent Event \| 7.00% Preference Shares, rep by Dep Shares (AHL PRF)
Subsequent Event [Line Items]
Preferred Stock, Dividend Rate, Percentage	7.00%
Dividend, in usd per share	$ 612.50
Depositary share interest of 1/1000th in each 7.00%	0.001%
Depositary share dividend	$ 0.6125
Subsequent Event \| 7.00% Preference Shares, rep by Dep Shares (AHL PRF) \| S2025Q1SeriesGDividends
Subsequent Event [Line Items]
Payable Date	Apr. 01, 2025
Dividends Payable, Date Declared	Mar. 31, 2025