Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Financial Instruments where Carrying Amounts and Fair Values May Differ) (Details) - USD ($) $ in Millions		Mar. 31, 2024	Dec. 31, 2023
Reported Value Measurement [Member]
Assets
Mortgage loans on real estate (net of valuation allowances)	[1]	$ 7,539	$ 7,377
Policy loans	[1]	1,198	1,206
Funds withheld at interest	[1]	5,871	6,005
Cash and cash equivalents	[1]	3,237	1,635
Short-term investments	[1]	47	35
Other invested assets	[1]	1,015	1,019
Accrued investment income	[1]	808	759
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures	[1]	71	71
Liabilities
Interest-sensitive contract liabilities	[1],[2]	22,283	21,797
Funds withheld payable	[1]	4,599	4,689
Long-term debt	[1]	4,427	4,427
Estimate of Fair Value Measurement [Member]
Assets
Mortgage loans on real estate (net of valuation allowances)		7,116	6,975
Policy loans		1,198	1,206
Funds withheld at interest		5,485	5,547
Cash and cash equivalents		3,237	1,635
Short-term investments		47	35
Other invested assets		832	841
Accrued investment income		808	759
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures		74	73
Liabilities
Interest-sensitive contract liabilities	[2]	21,916	21,665
Funds withheld payable		4,341	4,400
Long-term Debt, Fair Value		4,235	4,243
Estimate of Fair Value Measurement [Member] | Fair Value Inputs Level 1 Member
Assets
Mortgage loans on real estate (net of valuation allowances)		0	0
Policy loans		0	0
Funds withheld at interest		0	0
Cash and cash equivalents		3,237	1,635
Short-term investments		47	35
Other invested assets		5	4
Accrued investment income		0	0
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures		0	0
Liabilities
Interest-sensitive contract liabilities	[2]	0	0
Funds withheld payable		0	0
Long-term Debt, Fair Value		0	0
Estimate of Fair Value Measurement [Member] | Fair Value Inputs Level 2 Member
Assets
Mortgage loans on real estate (net of valuation allowances)		0	0
Policy loans		1,198	1,206
Funds withheld at interest		0	0
Cash and cash equivalents		0	0
Short-term investments		0	0
Other invested assets		64	63
Accrued investment income		808	759
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures		0	0
Liabilities
Interest-sensitive contract liabilities	[2]	0	0
Funds withheld payable		0	0
Long-term Debt, Fair Value		0	0
Estimate of Fair Value Measurement [Member] | Fair Value Inputs Level 3 Member
Assets
Mortgage loans on real estate (net of valuation allowances)		7,116	6,975
Policy loans		0	0
Funds withheld at interest		5,485	5,547
Cash and cash equivalents		0	0
Short-term investments		0	0
Other invested assets		763	774
Accrued investment income		0	0
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures		74	73
Liabilities
Interest-sensitive contract liabilities	[2]	21,916	21,665
Funds withheld payable		4,341	4,400
Long-term Debt, Fair Value		4,235	4,243
Mortgage loans on real estate (net of valuation allowances)		7,539	7,377
Policy loans		1,198	1,206
Funds withheld at interest		5,642	5,683
Cash and cash equivalents		5,935	2,970
Short-term investments		327	222
Other invested assets		1,140	1,171
Accrued investment income		808	759
Interest-sensitive contract liabilities		31,319	30,273
Funds withheld payable		4,409	4,483
Long-term debt		4,427	4,427
Reinsurance Recoverables, Gross		$ 2,100	$ 2,200

[1] Carrying values presented herein may differ from those in the Company’s condensed 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 $2.1 billion and $2.2 billion as of March 31, 2024 and December 31, 2023, respectively.