Name:	ck0000839759_AssumedLifeAndAnnuityContractBenefits
Namespace Prefix:	ck0000839759_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Contract benefits related to provision for benefits, claims and claims settlement expenses directly incurred during the period for life and annuity insurance contracts, as well as accident and health insurance contracts.

No definition available.

Name:	ck0000839759_DirectLifeAndAnnuityContractBenefits
Namespace Prefix:	ck0000839759_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Provision for benefits, claims and claims settlement expenses incurred during the period for life and annuity insurance contracts, as well as accident and health insurance contracts, net of the effects of contracts assumed and ceded.

No definition available.

Name:	ck0000839759_LifeAndAnnuityContractBenefitsNetOfReinsuranceRecoveries
Namespace Prefix:	ck0000839759_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount in the period for estimated recoupment of contract benefits under life insurance, accident and health insurance, and annuity contracts ceded.

No definition available.

Name:	ck0000839759_ReinsuranceCededLifeAndAnnuityContractBenefits
Namespace Prefix:	ck0000839759_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.