Fair Value of Assets and Liabilities (Financial Instruments where Carrying Amounts and Fair Values May Differ) (Details) - USD ($) $ in Millions		Dec. 31, 2024	Jan. 01, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2020
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans on real estate		$ 8,839		$ 7,377
Policy loans		1,321		1,206
Funds withheld at interest		5,436		5,683
Cash and cash equivalents		3,326		2,970	$ 2,927	$ 2,948
Short-term investments		363		222
Other invested assets		1,242		1,171
Accrued investment income		986		759
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-sensitive contract liabilities		35,095		30,273
Funds Held under Reinsurance Agreements, Liability		5,017		4,483
Reinsurance Recoverable, Allowance for Credit Loss		2,000		2,200
Other Notes Payable			$ 600
Carrying Value [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans on real estate	[1]	8,839		7,377
Policy loans	[1]	1,321		1,206
Funds withheld at interest	[1]	5,596		6,005
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures	[1]	64		71
Cash and cash equivalents	[1]	1,271		1,635
Short-term investments	[1]	50		35
Other invested assets	[1]	1,064		1,019
Accrued investment income	[1]	986		759
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-sensitive contract liabilities	[1],[2],[3]	22,617		21,797
Funds Held under Reinsurance Agreements, Liability	[1]	5,177		4,689
Long And Short Term Debt	[1]	5,042		4,427
Other Notes Payable		3,200		1,300
Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans on real estate		8,422		6,975
Policy loans		1,321		1,206
Funds withheld at interest		5,296		5,547
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures		88		73
Cash and cash equivalents		1,271		1,635
Short-term investments		50		35
Other invested assets		862		841
Accrued investment income		986		759
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-sensitive contract liabilities	[2],[3]	22,376		21,665
Funds Held under Reinsurance Agreements, Liability		4,960		4,400
Long And Short Term Debt		4,836		4,243
Other Notes Payable		3,200		1,200
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans on real estate		0		0
Policy loans		0		0
Funds withheld at interest		0		0
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures		0		0
Cash and cash equivalents		1,271		1,635
Short-term investments		50		35
Other invested assets		3		4
Accrued investment income		0		0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-sensitive contract liabilities	[2],[3]	0		0
Funds Held under Reinsurance Agreements, Liability		0		0
Long And Short Term Debt		0		0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans on real estate		0		0
Policy loans		1,321		1,206
Funds withheld at interest		0		0
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures		0		0
Cash and cash equivalents		0		0
Short-term investments		0		0
Other invested assets		71		63
Accrued investment income		986		759
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-sensitive contract liabilities	[2],[3]	0		0
Funds Held under Reinsurance Agreements, Liability		0		0
Long And Short Term Debt		0		0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans on real estate		8,422		6,975
Policy loans		0		0
Funds withheld at interest		5,296		5,547
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures		88		73
Cash and cash equivalents		0		0
Short-term investments		0		0
Other invested assets		788		774
Accrued investment income		0		0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-sensitive contract liabilities	[2],[3]	22,376		21,665
Funds Held under Reinsurance Agreements, Liability		4,960		4,400
Long And Short Term Debt		$ 4,836		$ 4,243

[1] Carrying values presented herein may differ from those in the Company’s consolidated balance sheets because certain items within the respective financial statement captions may be measured at fair value on a recurring basis.

[2] Carrying values and estimated fair values presented herein include a reinsurance recoverable of $2.0 billion and $2.2 billion as of December 31, 2024 and 2023, respectively.

[3] Carrying values and estimated fair values presented herein exclude FABN carrying values of $3.2 billion and $1.3 billion as of December 31, 2024 and 2023, respectively, and estimated fair values of $3.2 billion and $1.2 billion as of December 31, 2024 and 2023, respectively.