Derivative Financial Instruments (Credit Derivatives-Selling Protection) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015 entity	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Term of credit default swaps (in years)	5 years
Credit Derivatives
Notional amount	$ 3,533invest_DerivativeNotionalAmount	$ 3,649invest_DerivativeNotionalAmount
The number of reference entities generally included in a CDX index	125
Credit default swaps
Credit Derivatives
Notional amount	180	180
Fair value	(7)	(7)
Credit default swaps \| First-to-default Basket \| Municipal
Credit Derivatives
Notional amount	100	100
Fair value	(9)	(9)
Credit default swaps \| Index \| Corporate debt
Credit Derivatives
Notional amount	80	80
Fair value	2	2
AA \| Credit default swaps
Credit Derivatives
Notional amount	1	0
AA \| Credit default swaps \| First-to-default Basket \| Municipal
Credit Derivatives
Notional amount	0	0
AA \| Credit default swaps \| Index \| Corporate debt
Credit Derivatives
Notional amount	1	0
A \| Credit default swaps
Credit Derivatives
Notional amount	120	122
A \| Credit default swaps \| First-to-default Basket \| Municipal
Credit Derivatives
Notional amount	100	100
A \| Credit default swaps \| Index \| Corporate debt
Credit Derivatives
Notional amount	20	22
BBB \| Credit default swaps
Credit Derivatives
Notional amount	52	52
BBB \| Credit default swaps \| First-to-default Basket \| Municipal
Credit Derivatives
Notional amount	0	0
BBB \| Credit default swaps \| Index \| Corporate debt
Credit Derivatives
Notional amount	52	52
BB and lower \| Credit default swaps
Credit Derivatives
Notional amount	7	6
BB and lower \| Credit default swaps \| First-to-default Basket \| Municipal
Credit Derivatives
Notional amount	0	0
BB and lower \| Credit default swaps \| Index \| Corporate debt
Credit Derivatives
Notional amount	$ 7	$ 6

The general number of entities included in a credit derivative index group.

No definition available.

Name:	alic_CreditIndexNumberOfReferenceEntities
Namespace Prefix:	alic_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_CreditDerivativesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of the credit risk derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4K

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5708775-113959

+ Details

Name:	us-gaap_CreditDerivativeTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value of credit risk derivative asset after deduction of credit risk derivative liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4K

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5708775-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13495-108611

+ Details

Name:	us-gaap_CreditRiskDerivativesAtFairValueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_CreditDerivativesByContractTypeAxis=us-gaap_CreditDefaultSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditRatingStandardPoorsAxis=alic_StandardPoorsBBAndLowerRatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditRatingStandardPoorsAxis=us-gaap_StandardPoorsAARatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditRatingStandardPoorsAxis=us-gaap_StandardPoorsARatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditRatingStandardPoorsAxis=us-gaap_StandardPoorsBBBRatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: