Significant Accounting Policies and Pronouncements (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2020
Accounting Policies [Abstract]
Commercial mortgage and other loans, Loan-to- value ratios (greater than)	100.00%
Commercial mortgage and other loans, Loan-to-value ratios (less than)	100.00%
Commercial mortgage and other loans, Debt service coverage ratios (less than)	1.0
Commercial mortgage and other loans, Debt service coverage ratios (greater than)	1.0
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ (917,263)	$ 3,217,350
Funds withheld liability under a reinsurance agreement	$ 0	386,000
Uncertain tax positions measurement percentage (greater than)	50.00%
Securities Loaned Transactions Collateral Fair Value of Domestic Securities	102.00%
Securities Loaned Transactions Collateral Fair Value of Foreign Securities	105.00%
Third-party reinsurer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deposit assets related to reinsurance agreement	$ 0	425,900
Pruco Life
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deposit assets related to reinsurance agreement	$ 2,659,000	$ 0
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Repurchase and Resale Agreements, Collateral, Percentage	95.00%
Insurance revenue and expense recognition, Assumed interest rate	1.00%	0.00%
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Insurance revenue and expense recognition, Assumed interest rate	8.30%	8.30%
Restatement Adjustment | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings			$ 1,400