Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit Risk Derivatives, at Fair Value, Net	$ 0.0	$ 0.0
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	11.0
Credit Derivative, Maximum Exposure, Undiscounted	0.1	0.0
Future policy benefits
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative, Net	(9,317.0)	(8,332.0)
Policyholders' Account Balances
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative, Net	(81.0)	(42.0)
Prudential Insurance \| Reinsurance Recoverables (Payables)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative, Net	250.0	234.0
Pruco Life \| Reinsurance Recoverables (Payables)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative, Net	$ 34.0	$ 6.0

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=112277219&loc=d3e80748-113994

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- Definition

Maximum potential amount of future undiscounted payments that could be required under the credit derivative, before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5708775-113959

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
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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.

+ References

No definition available.

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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