Related Party Transactions (Affiliated Asset Transfers) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	[1]	Jun. 30, 2023	Jun. 30, 2022	[2]	Dec. 31, 2022
Related Party Transaction [Line Items]
Additional paid-in capital							$ 6,037,914
Realized investment gains (losses)	$ 7,694	$ 360,219		$ (112,985)	$ 713,500
Affiliated Entity | PALAC - January 2022 - Purchase - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	4,432			4,432
Book Value	4,432			4,432
Additional paid-in capital	0			0
Realized investment gains (losses)				0
Affiliated Entity | PALAC - January 2022 - Purchase - Derivatives
Related Party Transaction [Line Items]
Fair Value	404			404
Book Value	404			404
Additional paid-in capital	0			0
Realized investment gains (losses)				0
Affiliated Entity | PALAC - February 2022 - Purchase - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	128,909			128,909
Book Value	128,909			128,909
Additional paid-in capital	0			0
Realized investment gains (losses)				0
Affiliated Entity | PAR U - April 2022 - Purchase - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	48,970			48,970
Book Value	48,970			48,970
Additional paid-in capital	0			0
Realized investment gains (losses)				0
Affiliated Entity | Prudential Insurance - May 2022 - Purchase - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	233,426			233,426
Book Value	241,128			241,128
Additional paid-in capital	6,085			6,085
Realized investment gains (losses)				0
Affiliated Entity | Prudential Insurance - June 2022 - Purchase - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	88,754			88,754
Book Value	81,216			81,216
Additional paid-in capital	(5,955)			(5,955)
Realized investment gains (losses)				0
Affiliated Entity | Prudential Insurance - June 2022 - Transfer In - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	52,089			52,089
Book Value	45,031			45,031
Additional paid-in capital	(5,577)			(5,577)
Realized investment gains (losses)				0
Affiliated Entity | Prudential Insurance - June 2022 - Transfer Out - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	48,786			48,786
Book Value	58,984			58,984
Additional paid-in capital	(8,057)			(8,057)
Realized investment gains (losses)				0
Affiliated Entity | PAR U - June 2022 - Purchase - Commercial Mortgage and Other Loans
Related Party Transaction [Line Items]
Fair Value	6,492			6,492
Book Value	6,492			6,492
Additional paid-in capital	0			0
Realized investment gains (losses)				0
Affiliated Entity | PAR U - June 2022 - Sale - Commercial Mortgage and Other Loans
Related Party Transaction [Line Items]
Fair Value	14,853			14,853
Book Value	15,725			15,725
Additional paid-in capital	0			0
Realized investment gains (losses)				(872)
Affiliated Entity | GUL Re - June 2022 - Purchase - Commercial Mortgage and Other Loans
Related Party Transaction [Line Items]
Fair Value	13,551			13,551
Book Value	13,551			13,551
Additional paid-in capital	0			0
Realized investment gains (losses)				0
Affiliated Entity | GUL Re - June 2022 - Sale - Commercial Mortgage and Other Loans
Related Party Transaction [Line Items]
Fair Value	8,692			8,692
Book Value	9,033			9,033
Additional paid-in capital	0			0
Realized investment gains (losses)				(341)
Affiliated Entity | PURC - June 2022 - Purchase - Commercial Mortgage and Other Loans
Related Party Transaction [Line Items]
Fair Value	4,403			4,403
Book Value	4,403			4,403
Additional paid-in capital	0			0
Realized investment gains (losses)				0
Affiliated Entity | Prudential Insurance - July 2022 - Transfer in - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	6,319			6,319
Book Value	7,230			7,230
Additional paid-in capital	719			719
Realized investment gains (losses)				0
Affiliated Entity | Prudential Arizona Reinsurance Captive Co - July 2022 - Purchase - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	16,284			16,284
Book Value	16,284			16,284
Additional paid-in capital	0			0
Realized investment gains (losses)				0
Affiliated Entity | Prudential Insurance - August 2022 - Purchase - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	155,823			155,823
Book Value	139,712			139,712
Additional paid-in capital	(12,728)			(12,728)
Realized investment gains (losses)				0
Affiliated Entity | Vantage Casualty Insurance Co - September 2022 - Purchase - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	3,497			3,497
Book Value	3,497			3,497
Additional paid-in capital	0			0
Realized investment gains (losses)				0
Affiliated Entity | WH Warehouse Ltd - October 2022 - Sale - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	26,536			26,536
Book Value	26,388			26,388
Additional paid-in capital	0			0
Realized investment gains (losses)				148
Affiliated Entity | PARU - November 2022 - Purchase - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	91,051			91,051
Book Value	91,051			91,051
Additional paid-in capital	0			0
Realized investment gains (losses)				0
Affiliated Entity | Prudential Insurance - December 2022 - Purchase - Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	67,477			67,477
Book Value	71,369			71,369
Additional paid-in capital	3,075			3,075
Realized investment gains (losses)				0
Affiliated Entity | Prudential Insurance, January 2023, Purchase, Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	48,329			48,329
Book Value	50,372			50,372
Additional paid-in capital	1,614			1,614
Realized investment gains (losses)				0
Affiliated Entity | Prudential Insurance, March 2023, Purchase, Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	7,175			7,175
Book Value	7,500			7,500
Additional paid-in capital	256			256
Realized investment gains (losses)				0
Affiliated Entity | PURC, April 2023, Purchase, Fixed maturities
Related Party Transaction [Line Items]
Fair Value	102,804			102,804
Book Value	102,804			102,804
Additional paid-in capital	0			0
Realized investment gains (losses)				0
Affiliated Entity | Term Re, June 2023, Purchase, Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	115,573			115,573
Book Value	115,573			115,573
Additional paid-in capital	0			0
Realized investment gains (losses)				0
Affiliated Entity | Prudential Insurance, June 2023, Purchase, Fixed Maturities
Related Party Transaction [Line Items]
Fair Value	4,298			4,298
Book Value	4,443			4,443
Additional paid-in capital	114			114
Realized investment gains (losses)				0
Affiliated Entity | Prudential Insurance, June 2023, Purchase, Fixed Maturities 1
Related Party Transaction [Line Items]
Fair Value	4,394			4,394
Book Value	4,494			4,494
Additional paid-in capital	80			80
Realized investment gains (losses)				0
Affiliated Entity | Prudential Insurance, June 2023, Purchase, Fixed Maturities 2
Related Party Transaction [Line Items]
Fair Value	19,453			19,453
Book Value	19,203			19,203
Additional paid-in capital	(198)			(198)
Realized investment gains (losses)				0
Affiliated Entity | Prudential Insurance, June 2023, Purchase, Fixed Maturities 3
Related Party Transaction [Line Items]
Fair Value	14,452			14,452
Book Value	15,086			15,086
Additional paid-in capital	$ 502			502
Realized investment gains (losses)				$ 0

[1] Prior period amounts adjusted for the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.

[2] Prior period amounts adjusted for the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.