Condensed Financial Information of The Registrant (Details) - USD ($)		3 Months Ended								12 Months Ended
		Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2006
Assets
Fixed maturity securities available-for-sale		$ 60,749,000,000				$ 56,735,000,000				$ 60,749,000,000	$ 56,735,000,000
Short-term investments		87,000,000				227,000,000				87,000,000	227,000,000
Cash and cash equivalents		2,948,000,000				3,408,000,000				2,948,000,000	3,408,000,000	$ 1,449,000,000	$ 1,890,000,000
Other assets		1,008,000,000				896,000,000				1,008,000,000	896,000,000
Total assets		92,175,000,000				84,656,000,000				92,175,000,000	84,656,000,000
Liabilities and Stockholders’ Equity
Other liabilities		2,663,000,000				1,340,000,000				2,663,000,000	1,340,000,000
Total stockholders equity		13,014,000,000				14,352,000,000				13,014,000,000	14,352,000,000	11,601,000,000	8,450,000,000
Total liabilities and stockholders’ equity		92,175,000,000				84,656,000,000				92,175,000,000	84,656,000,000
CONSOLIDATED STATEMENTS OF INCOME
Total investment related gains (losses), net										560,000,000	(33,000,000)	91,000,000
Provision for income taxes										74,000,000	138,000,000	262,000,000
Net Income (Loss) Attributable to Parent		156,000,000	$ (22,000,000)	$ 344,000,000	$ 139,000,000	132,000,000	$ 213,000,000	$ 158,000,000	$ (88,000,000)	617,000,000	415,000,000	870,000,000
Other Comprehensive Income (Loss), Net of Tax										(1,717,000,000)	2,222,000,000	2,501,000,000
Total comprehensive income (loss)										(1,100,000,000)	2,637,000,000	3,371,000,000
Debt Disclosure [Abstract]
Debt Issuance Cost		(28,000,000)				(24,000,000)				(28,000,000)	(24,000,000)
Long-term Debt, Gross		3,695,000,000				3,597,000,000				3,695,000,000	3,597,000,000
Debt Instrument, Face Amount														$ 850,000,000
Cash flows from operating activities
Net Income (Loss) Attributable to Parent		156,000,000	$ (22,000,000)	$ 344,000,000	139,000,000	132,000,000	$ 213,000,000	$ 158,000,000	(88,000,000)	617,000,000	415,000,000	870,000,000
Other, net										(436,000,000)	(98,000,000)	(57,000,000)
Net cash provided by operating activities										4,182,000,000	3,322,000,000	2,307,000,000
Cash flows from investing activities
Sales of fixed maturity securities available-for-sale										12,142,000,000	6,514,000,000	13,214,000,000
Payments to Acquire Businesses, Net of Cash Acquired										(156,000,000)	0	4,000,000
Payments for (Proceeds from) Short-term Investments										371,000,000	(155,000,000)	199,000,000
Payments for (Proceeds from) Other Investing Activities										397,000,000	(335,000,000)	(304,000,000)
Net cash used in investing activities										(4,628,000,000)	(2,680,000,000)	(2,638,000,000)
Cash flows from financing activities
Dividends to stockholders										(194,000,000)	(182,000,000)	(163,000,000)
Purchases of treasury stock										(99,000,000)	(163,000,000)	(101,000,000)
Exercise of stock options, net										0	1,000,000	6,000,000
Maturities of Senior Debt										403,000,000	3,000,000	403,000,000
Proceeds from affiliated long-term debt issuance										(500,000,000)	(598,000,000)	(599,000,000)
Payments Of Debt Issuance Costs										(6,000,000)	(5,000,000)	(5,000,000)
Net cash used in financing activities										20,000,000	1,254,000,000	(121,000,000)
Cash and cash equivalents, beginning of period					3,408,000,000				1,449,000,000	3,408,000,000	1,449,000,000	1,890,000,000
Cash and cash equivalents, end of period		2,948,000,000				3,408,000,000				2,948,000,000	3,408,000,000	1,449,000,000
Supplemental disclosures of cash flow information:
Interest paid										160,000,000	166,000,000	180,000,000
Income taxes paid (received), net of refunds										368,000,000	108,000,000	44,000,000
Cash Acquired from Acquisition										53,000,000		27,000,000
Long-term debt		3,667,000,000				3,573,000,000				3,667,000,000	3,573,000,000
Proceeds from Issuance of Common Stock										0	481,000,000	0
Parent Company [Member]
Assets
Fixed maturity securities available-for-sale		523,000,000				642,000,000				523,000,000	642,000,000
Short-term investments		7,000,000				172,000,000				7,000,000	172,000,000
Cash and cash equivalents		92,000,000				494,000,000				92,000,000	494,000,000	10,000,000	$ 21,000,000
Investments In Subsidiary		15,737,000,000				16,937,000,000				15,737,000,000	16,937,000,000
Loans and Leases Receivable, Related Parties		1,020,000,000				1,010,000,000				1,020,000,000	1,010,000,000
Other assets		382,000,000				326,000,000				382,000,000	326,000,000
Total assets		17,761,000,000				19,581,000,000				17,761,000,000	19,581,000,000
Liabilities and Stockholders’ Equity
Long-term debt - affiliated	[1]	600,000,000				500,000,000				600,000,000	500,000,000
Other liabilities		975,000,000				1,160,000,000				975,000,000	1,160,000,000
Total stockholders equity		13,014,000,000				14,352,000,000				13,014,000,000	14,352,000,000
Total liabilities and stockholders’ equity		17,761,000,000				19,581,000,000				17,761,000,000	19,581,000,000
CONSOLIDATED STATEMENTS OF INCOME
Interest and Dividend Income, Operating	[2]									399,000,000	472,000,000	308,000,000
Total investment related gains (losses), net										5,000,000	14,000,000	4,000,000
Operating Expenses										(66,000,000)	(59,000,000)	(55,000,000)
Interest and Debt Expense										(152,000,000)	(202,000,000)	(206,000,000)
Income (loss) before income tax and undistributed earnings of subsidiaries										186,000,000	225,000,000	51,000,000
Provision for income taxes										(21,000,000)	(21,000,000)	(33,000,000)
Net income (loss) before undistributed earnings of subsidiaries										207,000,000	246,000,000	84,000,000
Equity In Undistributed Earnings Of Subsidiaries										410,000,000	169,000,000	786,000,000
Net Income (Loss) Attributable to Parent										617,000,000	415,000,000	870,000,000
Other Comprehensive Income (Loss), Net of Tax										14,000,000	(29,000,000)	(33,000,000)
Total comprehensive income (loss)										631,000,000	386,000,000	837,000,000
Debt Disclosure [Abstract]
Debt Issuance Cost		(23,000,000)				(25,000,000)				(23,000,000)	(25,000,000)
Proceeds from Dividends Received										270,000,000	340,000,000
Long-term Debt, Gross		3,195,000,000				3,594,000,000				3,195,000,000	3,594,000,000
Long-term Debt		600,000,000				600,000,000				600,000,000	600,000,000
Cash flows from operating activities
Net Income (Loss) Attributable to Parent										617,000,000	415,000,000	870,000,000
Equity Net Earnings Subsidiaries										(410,000,000)	(169,000,000)	(786,000,000)
Other, net										(227,000,000)	(170,000,000)	72,000,000
Net cash provided by operating activities										(20,000,000)	76,000,000	156,000,000
Cash flows from investing activities
Sales of fixed maturity securities available-for-sale										268,000,000	358,000,000	576,000,000
Purchases of fixed maturity securities available-for-sale										(150,000,000)	(400,000,000)	(494,000,000)
Purchases Of Subsidiary Debt Securities										(10,000,000)	0	0
Payments for (Proceeds from) Short-term Investments										165,000,000	(165,000,000)	0
Payments for (Proceeds from) Other Investing Activities										(1,000,000)	(26,000,000)	0
Capital Contributions To Subsidiaries										(43,000,000)	(78,000,000)	(96,000,000)
Net cash used in investing activities										229,000,000	(311,000,000)	(14,000,000)
Cash flows from financing activities
Dividends to stockholders										(194,000,000)	(182,000,000)	(163,000,000)
Purchases of treasury stock										(99,000,000)	(163,000,000)	(101,000,000)
Exercise of stock options, net										0	1,000,000	6,000,000
Net Change In Cash Collateral For Loaned Securities										(19,000,000)	(11,000,000)	(92,000,000)
Maturities of Senior Debt										(399,000,000)	0	(397,000,000)
Repayments of Long-term Debt										(500,000,000)	0	0
Proceeds from Issuance of Senior Long-term Debt										0	598,000,000	599,000,000
Proceeds from affiliated long-term debt issuance										(600,000,000)	0	0
Payments Of Debt Issuance Costs										0	(5,000,000)	(5,000,000)
Net cash used in financing activities										(611,000,000)	719,000,000	(153,000,000)
Change in cash and cash equivalents										(402,000,000)	484,000,000	(11,000,000)
Cash and cash equivalents, beginning of period					$ 494,000,000				$ 10,000,000	494,000,000	10,000,000	21,000,000
Cash and cash equivalents, end of period		92,000,000				494,000,000				92,000,000	494,000,000	10,000,000
Supplemental disclosures of cash flow information:
Interest paid										173,000,000	187,000,000	192,000,000
Income taxes paid (received), net of refunds										323,000,000	23,000,000	9,000,000
Long-term debt	[3]	3,172,000,000				3,569,000,000				3,172,000,000	3,569,000,000
Proceeds from Issuance of Common Stock										0	481,000,000	$ 0
Senior Notes Due 2021 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		0				400,000,000				0	400,000,000
Debt Instrument, Face Amount		$ 400,000,000								$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage		5.00%								5.00%
Senior Notes Due 2021 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 0				400,000,000				$ 0	400,000,000
Senior Notes Due 2023 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		400,000,000				399,000,000				400,000,000	399,000,000
Debt Instrument, Face Amount		$ 400,000,000								$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.70%								4.70%
Senior Notes Due 2023 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 400,000,000				399,000,000				$ 400,000,000	399,000,000
Senior Notes Due 2026 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		400,000,000				400,000,000				400,000,000	400,000,000
Debt Instrument, Face Amount		$ 400,000,000								$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage		3.95%								3.95%
Senior Notes Due 2026 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 400,000,000				400,000,000				$ 400,000,000	400,000,000
Senior Notes Due 2029 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		599,000,000				599,000,000				599,000,000	599,000,000
Debt Instrument, Face Amount		$ 600,000,000								$ 600,000,000
Debt Instrument, Interest Rate, Stated Percentage		3.90%								3.90%
Senior Notes Due 2029 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 599,000,000				599,000,000				$ 599,000,000	599,000,000
Subordinated Debentures Due 2042 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		400,000,000				400,000,000				400,000,000	400,000,000
Debt Instrument, Face Amount		$ 400,000,000								$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage		6.20%								6.20%
Subordinated Debentures Due 2042 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 400,000,000				400,000,000				$ 400,000,000	400,000,000
Subordinated Debentures Due 2056 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		400,000,000				400,000,000				400,000,000	400,000,000
Debt Instrument, Face Amount		$ 400,000,000								$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage		5.75%								5.75%
Subordinated Debentures Due 2056 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 400,000,000				400,000,000				$ 400,000,000	400,000,000
Junior Subordinated Debentures Due 2065 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		319,000,000				319,000,000				319,000,000	319,000,000
Debt Instrument, Face Amount		$ 400,000,000								$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.82%								4.82%
Junior Subordinated Debentures Due 2065 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 399,000,000				398,000,000				$ 399,000,000	398,000,000
Senior Notes Due 2030
Debt Disclosure [Abstract]
Long-term Debt, Gross		597,000,000				597,000,000				597,000,000	597,000,000
Debt Instrument, Face Amount		$ 600,000,000								$ 600,000,000
Debt Instrument, Interest Rate, Stated Percentage		3.15%								3.15%
Senior Notes Due 2030 | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross		$ 597,000,000				$ 598,000,000				$ 597,000,000	$ 598,000,000

[1] Long-term debt includes $600 million and $500 million of affiliated subordinated debt in 2021 and 2020, respectively. The affiliated subordinated debt was issued to various operating subsidiaries.

[2] Interest/dividend income includes $270 million and $340 million of cash dividends received from consolidated subsidiaries in 2021 and 2020, respectively.

[3] Long-term debt – unaffiliated consists of the following: 20212020 $400 million 5.00% Senior Notes due 2021 $— $400  $400 million 4.70% Senior Notes due 2023 400 399  $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 597 598  $400 million 6.20% Subordinated Debentures due 2042 400 400  $400 million 5.75% Subordinated Debentures due 2056 400 400  $400 million Variable Rate Junior Subordinated Debentures due 2065 399 398 Subtotal3,195 3,594 Unamortized debt issuance costs(23)(25)Total$3,172 $3,569