XML 131 R54.htm IDEA: XBRL DOCUMENT
v3.22.1

Concentration of Credit Risk (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Risks and Uncertainties [Abstract] |
Schedule Of Gross Written Premium From Major Brokers | The following table shows the largest brokers that the Company transacted business within the three years ended December 31, 2021 and the proportion of gross written premiums from each of those brokers.
|  |  | Twelve Months Ended December 31,
|  |  | 2021 |  | 2020 |  | 2019
|  |  | (in percentages)
Aon Corporation |  | 17.3 | % |  | 15.8 | % |  | 13.4 | %
Marsh & McLennan Companies, Inc. |  | 17.5 |  |  | 15.4 |  |  | 13.6 |
Willis Group Holdings, Ltd. |  | 9.6 |  |  | 10.4 |  |  | 10.3 |
Other brokers/non-broker sources (1) |  | 55.6 |  |  | 58.4 |  |  | 62.7 |
Total |  | 100.0 | % |  | 100.0 | % |  | 100.0 | %
Gross written premiums ($ millions) |  | $ | 3,938.4 |  |  | $ | 3,698.5 |  |  | $ | 3,442.4 |
______________ (1) No other individual broker accounted for more than 10% of total gross written premiums.

X
- Definition Tabular disclosure of gross written premium from major brokers. + References No definition available. + Details
Name: | ahl_ScheduleOfGrossWrittenPremiumFromMajorBrokersTableTextBlock
Namespace Prefix: | ahl_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RisksAndUncertaintiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration