Fair Value of Assets and Liabilities (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Separate Account assets transferred from Level 2 to Level 1	$ 0	$ 0
Total commercial mortgage and other loans, net of valuation allowance	418,082,000	422,563,000
Other Long-Term Investments	206,697,000us-gaap_OtherLongTermInvestments	162,783,000us-gaap_OtherLongTermInvestments
Other liabilities	115,998,000us-gaap_OtherLiabilities	105,972,000us-gaap_OtherLiabilities
Embedded Derivative Fair Value of Embedded Derivative	3,430,000,000	3,112,000,000
Embedded Derivative Gross Asset	41,000,000cik881453_EmbeddedDerivativeGrossAsset	55,000,000cik881453_EmbeddedDerivativeGrossAsset
Embedded Derivative Gross Liability	3,471,000,000	3,167,000,000
Fair Value of Level 3 Derivatives	0cik881453_FairValueOfLevel3Derivatives	0cik881453_FairValueOfLevel3Derivatives
Separate Account assets transferred from Level 1 to Level 2	0	7,000,000
MarginDepositAssets	$ (2,100,000)us-gaap_MarginDepositAssets	$ 3,000,000us-gaap_MarginDepositAssets

No authoritative reference available.

No definition available.

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- Definition

No authoritative reference available.

+ References

No definition available.

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- Definition

Fair Value Measurement Recurring Basis Asset And Liabilities Transfers Out Of Level 1 Into Level 2

+ References

No definition available.

+ Details

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- Definition

Transfers of assets and liabilities measured on a recurring basis from Level 2 to level 1.

+ References

No definition available.

+ Details

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- Definition

Fair Value of Level 3 Derivatives

+ References

No definition available.

+ Details

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- Definition

Total Commercial Mortgage And Other Loans

+ References

No definition available.

+ Details

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- Definition

Net fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as assets, net of those classified as liabilities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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- Definition

The amount of cash or securities placed with a broker or counterparty as security for a trading or derivatives securities position which was partially obtained with funds provided by the broker dealer.

+ References

+ Details

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- Definition

The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Article 9

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

Other long-term investments not otherwise specified in the taxonomy, not including investments in marketable securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 12

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.1(f))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Subparagraph f

-Article 7

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