Condensed Financial Information of The Registrant (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets
Fixed maturity securities available-for-sale		$ 77,617	[1]	$ 60,467	[2]
Short-term investments		363		222
Cash and cash equivalents		3,326		2,970		$ 2,927		$ 2,948
Other assets		1,351		1,401
Total assets	[3]	118,675		97,623		84,904
Liabilities and Equity
Other liabilities		2,816		2,085
Total stockholders equity		10,816		9,081		7,081	$ 8,180
Total liabilities and stockholders’ equity		118,675		97,623
CONSOLIDATED STATEMENTS OF INCOME
Total investment related gains (losses), net		(745)		(481)		(539)
Provision for income taxes		256		251		197
Net Income (Loss) Attributable to Parent		717		902		517
Other Comprehensive Income (Loss), Net of Tax		1,218		1,502		(1,371)
Total comprehensive income (loss)		1,935		2,404		(854)
Debt Disclosure [Abstract]
Debt Issuance Cost		(39)		(37)
Long-term Debt, Gross		5,081		4,464
Cash flows from operating activities
Net Income (Loss) Attributable to Parent		717		902		517
Other, net		(16)		(135)		(90)
Net cash provided by operating activities		9,370		4,044		1,343
Cash flows from investing activities
Sales of fixed maturity securities available-for-sale		28,153		8,195		10,558
Net Cash Return Of Capital From Subsidiaries		214		0		0
Payments for (Proceeds from) Other Investing Activities		(14)		(49)		(23)
Net cash used in investing activities		(12,545)		(4,066)		(5,688)
Cash flows from financing activities
Dividends to stockholders		(229)		(219)		(205)
Purchases of treasury stock		(27)		(227)		(81)
Principal payments of long-term debt		(28)		(428)		(403)
Proceeds from affiliated long-term debt issuance		(640)		(890)		(690)
Net cash provided by financing activities		3,661		78		4,436
Change in cash and cash equivalents		356		43		(21)
Cash and cash equivalents, beginning of period		2,970		2,927
Cash and cash equivalents, end of period		3,326		2,970		2,927
Supplemental disclosures of cash flow information:
Interest paid		213		217		163
Income taxes paid, net of refunds		78		298		129
Long-term debt		5,042		4,427
Parent Company [Member]
Assets
Fixed maturity securities available-for-sale		526		579
Short-term investments		12		31
Cash and cash equivalents		125		102		298	$ 92
Investments In Subsidiary		14,226		12,031
Loans and Leases Receivable, Related Parties		1,010		1,010
Other assets		504		698
Total assets		16,403		14,451
Liabilities and Equity
Long-term debt - affiliated		600		600
Other liabilities		876		1,302
Total stockholders equity		10,816		9,081
Total liabilities and stockholders’ equity		16,403		14,451
CONSOLIDATED STATEMENTS OF INCOME
Interest and Dividend Income, Operating	[4]	137		654		325
Total investment related gains (losses), net		(4)		(1)		2
Operating Expenses		(66)		(67)		(53)
Interest and Debt Expense		(224)		(202)		(183)
Income (loss) before income tax and undistributed earnings of subsidiaries		(157)		384		91
Provision for income taxes		(17)		(35)		(22)
Net income (loss) before undistributed earnings of subsidiaries		(140)		419		113
Equity In Undistributed Earnings Of Subsidiaries		857		483		404
Net Income (Loss) Attributable to Parent		717		902		517
Other Comprehensive Income (Loss), Net of Tax		12		3		19
Total comprehensive income (loss)		729		905		536
Debt Disclosure [Abstract]
Debt Issuance Cost		(30)		(27)
Long-term Debt, Gross		4,141		3,495
Cash flows from operating activities
Net Income (Loss) Attributable to Parent		717		902		517
Equity Net Earnings Subsidiaries		(857)		(483)		(404)
Other, net		(194)		(190)		316
Net cash provided by operating activities		(334)		229		429
Cash flows from investing activities
Sales of fixed maturity securities available-for-sale		289		265		177
Purchases of fixed maturity securities available-for-sale		(249)		(273)		(315)
Purchases Of Subsidiary Debt Securities		0		50		(40)
Payments for (Proceeds from) Short-term Investments		15		(15)		0
Payments for (Proceeds from) Other Investing Activities		15		(4)		(1)
Capital Contributions To Subsidiaries		(320)		(51)		(53)
Net cash used in investing activities		(23)		14		(232)
Cash flows from financing activities
Dividends to stockholders		(229)		(219)		(205)
Purchases of treasury stock		(27)		(227)		(81)
Net Change In Cash Collateral For Loaned Securities		(4)		11		5
Principal payments of long-term debt		0		(400)		(400)
Proceeds from Issuance of Senior Long-term Debt		640		396		690
Net cash provided by financing activities		380		(439)		9
Change in cash and cash equivalents		23		(196)		206
Cash and cash equivalents, beginning of period		102		298		92
Cash and cash equivalents, end of period		125		102		298
Supplemental disclosures of cash flow information:
Interest paid		197		186		156
Income taxes paid, net of refunds		0		169		0
Long-term debt	[5]	4,111		3,468
Proceeds from Sale and Maturity of Marketable Securities		13		42		0
Proceeds from Dividends Received		0		520		$ 188
Senior Notes Due 2023 [Member]
Debt Disclosure [Abstract]
Debt Instrument, Face Amount		$ 400
Debt Instrument, Interest Rate, Stated Percentage		4.70%
Senior Notes Due 2026 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 400		400
Debt Instrument, Face Amount		$ 400
Debt Instrument, Interest Rate, Stated Percentage		3.95%
Senior Notes Due 2026 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 400		400
Senior Notes Due 2029 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		599		599
Debt Instrument, Face Amount		$ 600
Debt Instrument, Interest Rate, Stated Percentage		3.90%
Senior Notes Due 2029 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 599		599
Subordinated Debentures Due 2056 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		400		400
Debt Instrument, Face Amount		$ 400
Debt Instrument, Interest Rate, Stated Percentage		5.75%
Subordinated Debentures Due 2056 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 400		400
Junior Subordinated Debentures Due 2065 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		319		319
Debt Instrument, Face Amount		$ 400
Debt Instrument, Interest Rate, Stated Percentage		4.82%
Junior Subordinated Debentures Due 2065 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 399		399
Senior Notes Due 2030
Debt Disclosure [Abstract]
Long-term Debt, Gross		598		598
Debt Instrument, Face Amount		$ 600
Debt Instrument, Interest Rate, Stated Percentage		3.15%
Senior Notes Due 2030 | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 598		598
Subordinated Debentures Due 2052
Debt Disclosure [Abstract]
Long-term Debt, Gross		700		700
Debt Instrument, Face Amount		$ 700
Debt Instrument, Interest Rate, Stated Percentage		7.125%
Subordinated Debentures Due 2052 | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 700		700
Senior Notes Due 2033
Debt Disclosure [Abstract]
Long-term Debt, Gross		399		399
Debt Instrument, Face Amount		$ 400
Debt Instrument, Interest Rate, Stated Percentage		6.00%
Senior Notes Due 2033 | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 399		399
Senior Notes Due 2034
Debt Disclosure [Abstract]
Long-term Debt, Gross		646		0
Debt Instrument, Face Amount		$ 650
Debt Instrument, Interest Rate, Stated Percentage		5.75%
Senior Notes Due 2034 | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 646		$ 0

[1] Excludes limited partnerships that are measured at estimated fair value using the NAV per share (or its equivalent) as a practical expedient. As of December 31, 2024, the fair value of such investments was $966 million

[2] Excludes limited partnerships that are measured at estimated fair value using the NAV per share (or its equivalent) as a practical expedient. As of December 31, 2023, the fair value of such investments was $856 million.

[3] Capital expenditures of each reporting segment were immaterial.

[4] Interest/dividend income includes $0, $520 million and $188 million of cash dividends received from consolidated subsidiaries in 2024, 2023 and 2022, respectively.

[5] Long-term debt – unaffiliated consists of the following: 20242023 $400 million 3.95% Senior Notes due 2026 $400 $400  $600 million 3.90% Senior Notes due 2029 599 599  $600 million 3.15% Senior Notes due 2030 598 598  $400 million 6.00% Senior Notes due 2033 399 399  $650 million 5.75% Senior Notes due 2034 646 —  $700 million 7.125% Fixed-Rate Reset Subordinated Debentures due 2052 700 700  $400 million 5.75% Fixed-to-Floating Subordinated Debentures due 2056 400 400  $400 million Variable Rate Junior Subordinated Debentures due 2065 399 399 Subtotal4,141 3,495 Unamortized debt issuance costs(30)(27)Total$4,111 $3,468