Gain (Loss) On Liability for Claims and Claims Adjustment Expense Portfolio Transfer

No definition available.

Name:	argo_GainLossOnLiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransfer
Namespace Prefix:	argo_
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- Definition

Increase (Decrease) in Investments and Cash

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No definition available.

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Namespace Prefix:	argo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Increase (Decrease) in Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments

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No definition available.

+ Details

Name:	argo_IncreaseDecreaseInReinsuranceRecoverableForPaidAndUnpaidClaimsAndClaimsAdjustments
Namespace Prefix:	argo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Liability for Claims and Claims Adjustment Expense, Portfolio Transfer, Cash and Investments Transferred

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No definition available.

+ Details

Name:	argo_LiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransferCashAndInvestmentsTransferred
Namespace Prefix:	argo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Liability for Claims and Claims Adjustment Expense, Portfolio Transfer, Reserves Cover

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No definition available.

+ Details

Name:	argo_LiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransferReservesCover
Namespace Prefix:	argo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Liability for Claims and Claims Adjustment Expense, Portfolio Transfer, Reserves Transferred

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No definition available.

+ Details

Name:	argo_LiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransferReservesTransferred
Namespace Prefix:	argo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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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No definition available.

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- Details

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- Details

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Subsequent Events (Details) - USD ($) $ in Millions	3 Months Ended
Subsequent Events (Details) - USD ($) $ in Millions	Dec. 31, 2022	Nov. 09, 2022	Aug. 08, 2022
Subsequent Event [Line Items]
Portfolio transfer reserves cover			$ 746.0
Forecast
Subsequent Event [Line Items]
Reduction to cash and investments	$ 630.0
Estimated after-tax expense	100.0
Subsequent Event
Subsequent Event [Line Items]
Reserves transferred on closing date		$ 509.0
Portfolio transfer reserves cover		746.0
Cash and investments transferred		$ 630.0
Subsequent Event \| Forecast
Subsequent Event [Line Items]
Increase in reinsurance recoverables	$ 509.0