Related Party Transactions (Narrative) (Details)	3 Months Ended			6 Months Ended
	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) policy	Jun. 30, 2019 USD ($)
Related Party Transaction [Line Items]
Commissions and fees	$ 161,085,000		$ 148,671,000	$ 301,004,000	$ 287,860,000
Other invested assets	468,005,000	$ 429,558,000		468,005,000
Net investment income	83,462,000		105,562,000	163,043,000	198,812,000
Fee income from revenue sharing agreement	4,302,000		3,961,000	8,690,000	7,618,000
Debt Outstanding	0	0		0
Dividends		250,000,000		0
Prudential Insurance
Related Party Transaction [Line Items]
Contributed Capital	325,000,000	6,000,000
Prudential Insurance
Related Party Transaction [Line Items]
Stock option program plan expense	400,000		600,000	500,000	700,000
Deferred compensation program expense	100,000		1,200,000	3,000,000.0	3,900,000
Pension plan expense	4,000,000		5,000,000	9,000,000	10,000,000
Welfare plan expense	3,000,000		6,000,000	$ 9,000,000	12,000,000
Defined contribution plan, employer matching contribution, percent (up to)				4.00%
Defined contribution plan, cost recognized	2,000,000		2,000,000	$ 4,000,000	5,000,000
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	4,207,000,000	4,339,000,000		$ 4,207,000,000
Fees related to Life Insurance, Corporate or Bank Owned, amount	11,000,000		11,000,000	25,000,000	24,000,000
Maximum amount of mortality risk	3,500,000			3,500,000
Prudential Financial
Related Party Transaction [Line Items]
Company's share of corporate expenses	6,000,000		20,000,000	$ 25,000,000	37,000,000
Number of Corporate Owned Life Insurance policies sold | policy				1
Affiliated Entity
Related Party Transaction [Line Items]
Accrued interest receivable related to long-tern notes receivable	1,000,000	1,000,000		$ 1,000,000
Revenues related to long-term notes receivable	1,000,000		1,000,000	2,000,000	2,000,000
Line of credit facility, maximum borrowing capacity	2,200,000,000			2,200,000,000
Interest expense related to loans payable	100,000		600,000	600,000	800,000
Affiliated Entity | PAD
Related Party Transaction [Line Items]
Commissions and fees	129,000,000		197,000,000	297,000,000	376,000,000
Affiliated Entity | ASTISI and PGIM Investments
Related Party Transaction [Line Items]
Fee income from revenue sharing agreement	81,000,000		84,000,000	166,000,000	165,000,000
Affiliated Entity | PGIM Investments
Related Party Transaction [Line Items]
Fee income from revenue sharing agreement	3,000,000		3,000,000	5,000,000	5,000,000
Affiliated Entity | PGIM
Related Party Transaction [Line Items]
Net investment income	4,000,000		3,000,000	7,000,000	7,000,000
Prudential Financial Joint Ventures
Related Party Transaction [Line Items]
Other invested assets	97,000,000	$ 96,000,000		97,000,000
Net investment income	$ 8,000,000		$ 2,000,000	$ 2,000,000	$ 7,000,000