Recognized Gain (Loss)

No definition available.

Name:	cik777917_RecognizedGainLoss
Namespace Prefix:	cik777917_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Reinsurance Retention Policy, Uncollected Charges And Fees Risk, Percentage

+ References

No definition available.

+ Details

Name:	cik777917_ReinsuranceRetentionPolicyUncollectedChargesAndFeesRiskPercentage
Namespace Prefix:	cik777917_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Related Party Transaction, Term

+ References

No definition available.

+ Details

Name:	cik777917_RelatedPartyTransactionTerm
Namespace Prefix:	cik777917_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ Details

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

- Definition

Sum of the carrying amounts as of the balance sheet date of all investments.

+ References

+ Details

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

- Definition

Amount, after valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.(a),6)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=99397103&loc=d3e6824-158387

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 310
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=99404803&loc=d3e21409-158489

+ Details

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

- Definition

Stated amount that is the upper retention limit per entity policy.

+ References

No definition available.

+ Details

Name:	us-gaap_ReinsuranceRetentionPolicyAmountRetained
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of risk reinsured in excess of stated retention per entity policy.

+ References

No definition available.

+ Details

Name:	us-gaap_ReinsuranceRetentionPolicyExcessRetentionPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of risk reinsured on insurance products per entity policy.

+ References

No definition available.

+ Details

Name:	us-gaap_ReinsuranceRetentionPolicyReinsuredRiskPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_CounterpartyNameAxis=cik777917_ParuMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=cik777917_PurcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=cik777917_ParccMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=cik777917_GULReMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=cik777917_ParTermMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=cik777917_PrudentialOfTaiwanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=cik777917_TermReMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=us-gaap_SubsidiaryOfCommonParentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=cik777917_DARTMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_AffiliatedEntityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=cik777917_UPARCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=cik777917_UnionHamiltonReinsuranceLtd.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ReinsurancePolicyTypeAxis=cik777917_QuoteShareReinsuranceforHDIv.3.0VABusinessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Reinsurance (Narrative) (Details) - USD ($) $ in Thousands										12 Months Ended	21 Months Ended	36 Months Ended		48 Months Ended
Reinsurance (Narrative) (Details) - USD ($) $ in Thousands	Jan. 01, 2018	Jul. 01, 2017	Jun. 30, 2017	Jan. 01, 2017	Jan. 01, 2014	Jul. 01, 2012	Dec. 31, 2010	Dec. 31, 2009	Jan. 31, 2001	Dec. 31, 2018	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2017
Effects of Reinsurance [Line Items]
Invested assets										$ 8,100,800					$ 7,811,638
Reinsurance recoverables										34,682,127					32,521,264
PAR U
Effects of Reinsurance [Line Items]
Reinsurance recoverables										11,444,032					11,111,272
PURC
Effects of Reinsurance [Line Items]
Reinsurance recoverables										4,127,455					3,577,962
PARCC
Effects of Reinsurance [Line Items]
Reinsurance recoverables										2,527,690					2,546,673
GUL Re
Effects of Reinsurance [Line Items]
Reinsurance recoverables										2,017,810					1,772,950
PAR Term
Effects of Reinsurance [Line Items]
Reinsurance recoverables										1,678,745					1,559,618
Prudential of Taiwan
Effects of Reinsurance [Line Items]
Reinsurance recoverables										1,414,669					1,406,686
Term Re
Effects of Reinsurance [Line Items]
Reinsurance recoverables										1,259,141					966,509
Prudential Insurance
Effects of Reinsurance [Line Items]
Reinsurance recoverables										1,226,917					1,118,004
DART
Effects of Reinsurance [Line Items]
Reinsurance recoverables										$ 119,946					$ 0
Affiliated Entity \| PAR U
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage						95.00%	70.00%
Affiliated Entity \| PURC
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage												95.00%	70.00%
Affiliated Entity \| PARCC
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage								90.00%
Affiliated Entity \| GUL Re
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage		30.00%		95.00%
Affiliated Entity \| PAR Term
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage														95.00%
Affiliated Entity \| Prudential of Taiwan
Effects of Reinsurance [Line Items]
Related Party Transaction, Term									2 years
Affiliated Entity \| Term Re
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage					95.00%
Affiliated Entity \| Prudential Insurance
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage										100.00%
Affiliated Entity \| DART
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage	95.00%
Affiliated Entity \| UPARC
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage			27.00%
Reinsurance Retention Policy, Amount Retained			$ 1,000
Reinsurance Retention Policy, Excess Retention, Percentage			30.00%
Reinsurance Retention Policy, Uncollected Charges And Fees Risk, Percentage			30.00%
Invested assets		$ 557,000
Reinsurance recoverables		760,000
Recognized Gain (Loss)		$ (203,000)
Affiliated Entity \| Union Hamilton Reinsurance, Ltd. \| Quote Share Reinsurance
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage											50.00%
Reinsurance Retention Policy, Amount Retained										$ 2,900,000	$ 2,900,000