Related Party Transactions (Narrative) (Details)	1 Months Ended			3 Months Ended					9 Months Ended		12 Months Ended
	Dec. 31, 2023 USD ($)	May 31, 2023 USD ($)	Feb. 28, 2023 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) policy	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Related Party Transaction [Line Items]
Commissions and fees				$ 408,767,000			$ 346,481,000		$ 3,706,806,000	$ 1,096,508,000
Payments to Fund Policy Loans									171,967,000	1,111,590,000
Policy loans	$ 1,472,677,000			1,524,636,000		$ 1,472,677,000			1,524,636,000		$ 1,472,677,000
Net investment income				638,692,000			460,864,000		1,724,005,000	1,203,389,000
Other invested assets	1,222,985,000			1,465,970,000		1,222,985,000			1,465,970,000		1,222,985,000
Fee income from revenue sharing agreement				56,428,000			56,754,000		168,173,000	177,744,000
Accrued investment income	333,838,000			444,591,000		333,838,000			444,591,000		333,838,000
Prudential Insurance
Related Party Transaction [Line Items]
Contributed Capital	7,000,000		$ 405,000,000
Return of Capital					$ 550,000,000	450,000,000	650,000,000	$ 300,000,000
Dividends									0		0
PGF
Related Party Transaction [Line Items]
Investment Income, Interest				126,000,000			132,000,000		381,000,000	363,000,000
Prudential Insurance
Related Party Transaction [Line Items]
Stock option program plan expense				200,000			200,000		800,000	700,000
Deferred compensation program expense				800,000			1,000,000.0		4,900,000	4,400,000
Pension plan expense				3,000,000			3,000,000		8,000,000	10,000,000
Welfare plan expense				4,000,000			4,000,000		$ 13,000,000	11,000,000
Defined contribution plan, employer matching contribution, percent (up to)									4.00%
Defined contribution plan, cost recognized				2,000,000			2,000,000		$ 6,000,000	6,000,000
Number of Corporate Owned Life Insurance policies sold | policy									5
Prudential Insurance and Prudential Financial
Related Party Transaction [Line Items]
Life Insurance, Corporate or Bank Owned, amount	4,156,000,000			4,637,000,000		4,156,000,000			$ 4,637,000,000		4,156,000,000
Fees related to Life Insurance, Corporate or Bank Owned, amount				14,000,000			13,000,000		41,000,000	38,000,000
Prudential Financial
Related Party Transaction [Line Items]
Company's share of corporate expenses				30,000,000			31,000,000		$ 98,000,000	104,000,000
Number of Corporate Owned Life Insurance policies sold | policy									1
Payments to Fund Policy Loans		$ 900,000,000
Policy loans	898,000,000			897,000,000		898,000,000			$ 897,000,000		898,000,000
Interest Income on Policy Loans				11,000,000			10,000,000		32,000,000	15,000,000
Affiliated Entity
Related Party Transaction [Line Items]
Net investment income				1,000,000			2,000,000		5,000,000	5,000,000
Accrued interest receivable related to long-term notes	1,000,000			6,000,000		1,000,000			6,000,000		1,000,000
Revenues related to long-term notes receivable				1,000,000			1,000,000		2,000,000	2,000,000
Accrued investment income	500,000			500,000		500,000			500,000		500,000
Line of credit facility, maximum borrowing capacity				7,000,000,000					7,000,000,000
Long-term debt to affiliates	0			0		0			0		0
Interest expense related to loans payable, Related Party				13,000,000			5,000,000		24,000,000	10,000,000
Affiliated Entity | PAD
Related Party Transaction [Line Items]
Commissions and fees				208,000,000			153,000,000		597,000,000	440,000,000
Affiliated Entity | PGIM
Related Party Transaction [Line Items]
Net investment income				18,000,000			14,000,000		50,000,000	39,000,000
Affiliated Entity | ASTISI and PGIM Investments
Related Party Transaction [Line Items]
Fee income from revenue sharing agreement				68,000,000			69,000,000		204,000,000	208,000,000
Affiliated Entity | PGIM Investments
Related Party Transaction [Line Items]
Fee income from revenue sharing agreement				12,000,000			10,000,000		34,000,000	28,000,000
Prudential Financial Joint Ventures
Related Party Transaction [Line Items]
Net investment income				17,000,000			$ 6,000,000		36,000,000	$ 2,000,000
Other invested assets	$ 754,000,000			$ 1,029,000,000		$ 754,000,000			$ 1,029,000,000		$ 754,000,000