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- Definition

Deferred Tax Assets, Operating Loss Carryforwards, available to offset

+ References

No definition available.

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- Definition

Deferred Tax Assets Operating Loss Carryforwards, s382 Limitation, Change of Ownership

+ References

No definition available.

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- Definition

Deferred Tax Losses, Operating Loss Carryforward

+ References

No definition available.

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- Definition

Income Taxes [Line Items]

+ References

No definition available.

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- Definition

Operating loss carryforwards, date of expiration

+ References

No definition available.

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-6

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
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-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-3

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Income Taxes - Additional Information (Details) - USD ($) $ in Millions		12 Months Ended
	Apr. 01, 2023	Dec. 31, 2025	Dec. 31, 2023	Dec. 31, 2027	Dec. 31, 2024
Income Taxes [Line Items]
Bermuda tax rate		23.40%
Capital loss carryforwards		$ 17.9			$ 17.8
Less valuation allowance		49.2			64.0
Bermuda
Income Taxes [Line Items]
Net operating loss carryforwards		$ 294.8			267.0
Internal Revenue Service (IRS)
Income Taxes [Line Items]
U. K. corporate tax rate		21.00%
Net operating loss carryforwards		$ 276.0			324.8
Operating loss carryforwards, remaining		276.0
Capital loss carryforwards		85.3
Less valuation allowance		$ 17.5			22.9
Internal Revenue Service (IRS) \| Minimum
Income Taxes [Line Items]
Operating loss carryforwards, date of expiration		2032
Internal Revenue Service (IRS) \| Maximum
Income Taxes [Line Items]
Operating loss carryforwards, date of expiration		2041
Internal Revenue Service (IRS) \| U.S. operating subsidiaries
Income Taxes [Line Items]
Net operating loss carryforwards		$ 226.4
Capital loss carryforwards		47.6
Internal Revenue Service (IRS) \| U.S. operating subsidiaries \| Subsequent Event
Income Taxes [Line Items]
Operating loss carryforwards, subject to s382 limitation				$ 20.8
Internal Revenue Service (IRS) \| Aspen UK's U.S. branch
Income Taxes [Line Items]
Net operating loss carryforwards		49.6
Operating loss carryforwards, subject to s382 limitation		6.5
Internal Revenue Service (IRS) \| Aspen UK
Income Taxes [Line Items]
Capital loss carryforwards		$ 37.7
U.K.
Income Taxes [Line Items]
U. K. corporate tax rate	25.00%	25.00%	19.00%
Net operating loss carryforwards		$ 194.6			249.5
Operating loss carryforwards, remaining		20.2			22.0
Less valuation allowance		20.3			26.1
U.K. \| Lloyd's
Income Taxes [Line Items]
Deferred tax losses, operating loss carryforward		(61.7)			(29.3)
U.K. \| Other juridictions
Income Taxes [Line Items]
Deferred tax losses, operating loss carryforward		$ (71.8)			$ (86.1)