Related Party Transactions (Affiliated Asset Transfers) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Related Party Transaction [Line Items]
Realized investment (gains) losses, net	$ (1,342,219)	$ 558,690
Affiliated Entity \| Prudential Insurance February 2018 Purchase
Related Party Transaction [Line Items]
Fair Value	136,963
Book Value	136,963
APIC, Net of Tax Increase/(Decrease)	0
Realized investment (gains) losses, net	0
Affiliated Entity \| Pruco Life April 2018 Sale
Related Party Transaction [Line Items]
Fair Value	64,313
Book Value	64,514
APIC, Net of Tax Increase/(Decrease)	0
Realized investment (gains) losses, net	(159)
Affiliated Entity \| Prudential Insurance April 2018 Sale
Related Party Transaction [Line Items]
Fair Value	57,747
Book Value	43,434
APIC, Net of Tax Increase/(Decrease)	0
Realized investment (gains) losses, net	11,308
Affiliated Entity \| Prudential Insurance May 2018 Sale
Related Party Transaction [Line Items]
Fair Value	162,111
Book Value	159,237
APIC, Net of Tax Increase/(Decrease)	0
Realized investment (gains) losses, net	2,271
Affiliated Entity \| Passaic Fund June 2018 Transfer Out
Related Party Transaction [Line Items]
Fair Value	15,281
Book Value	15,281
APIC, Net of Tax Increase/(Decrease)	0
Realized investment (gains) losses, net	0
Affiliated Entity \| Prudential Insurance July 2018 Sale
Related Party Transaction [Line Items]
Fair Value	11,160
Book Value	9,277
APIC, Net of Tax Increase/(Decrease)	0
Realized investment (gains) losses, net	1,488
Affiliated Entity \| Prudential Insurance August 2018 Sale
Related Party Transaction [Line Items]
Fair Value	13,414
Book Value	13,165
APIC, Net of Tax Increase/(Decrease)	0
Realized investment (gains) losses, net	196
Affiliated Entity \| Prudential Insurance December 2018 Purchase
Related Party Transaction [Line Items]
Fair Value	33,256
Book Value	33,166
APIC, Net of Tax Increase/(Decrease)	0
Realized investment (gains) losses, net	(71)
Affiliated Entity \| Prudential Agricultural Investors December 2018 Transfer Out
Related Party Transaction [Line Items]
Fair Value	7,324
Book Value	7,324
APIC, Net of Tax Increase/(Decrease)	0
Realized investment (gains) losses, net	0
Affiliated Entity \| Prudential Insurance January 2019 Sale
Related Party Transaction [Line Items]
Fair Value	20,504
Book Value	20,781
APIC, Net of Tax Increase/(Decrease)	0
Realized investment (gains) losses, net	(277)
Affiliated Entity \| Prudential Insurance February 2019 Sale
Related Party Transaction [Line Items]
Fair Value	97,953
Book Value	98,506
APIC, Net of Tax Increase/(Decrease)	0
Realized investment (gains) losses, net	(554)
Affiliated Entity \| Prudential Insurance March 2019 Purchase
Related Party Transaction [Line Items]
Fair Value	141,476
Book Value	141,476
APIC, Net of Tax Increase/(Decrease)	0
Realized investment (gains) losses, net	$ 7,776

Amortized Cost of assets associated with the Asset Transfer.

No definition available.

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- Definition

Fair Value of assets associated with the Asset Transfer.

+ References

No definition available.

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- Definition

Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30)(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.3(a))
-URI http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263

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- 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.

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