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		Sep. 30, 2023	Dec. 31, 2022
Reported Value Measurement [Member]
Assets
Mortgage loans on real estate (net of valuation allowances)	[1]	$ 7,231	$ 6,590
Policy loans	[1]	1,180	1,231
Funds withheld at interest	[1]	6,034	6,319
Cash and cash equivalents	[1]	1,241	1,392
Short-term investments	[1]	34	33
Other invested assets	[1]	972	947
Accrued investment income	[1]	744	630
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures	[1]	68	49
Liabilities
Interest-sensitive contract liabilities	[1]	22,598	23,493
Funds Held under Reinsurance Agreements, Liability	[1]	1,566	1,596
Long-term debt	[1]	4,450	3,961
Estimate of Fair Value Measurement [Member]
Assets
Mortgage loans on real estate (net of valuation allowances)		6,559	6,109
Policy loans		1,180	1,231
Funds withheld at interest		5,570	5,884
Cash and cash equivalents		1,241	1,392
Short-term investments		34	33
Other invested assets		744	758
Accrued investment income		744	630
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures		70	52
Liabilities
Interest-sensitive contract liabilities		21,867	23,065
Funds Held under Reinsurance Agreements, Liability		1,264	1,321
Long-term Debt, Fair Value		4,113	3,670
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		1,241	1,392
Short-term investments		34	33
Other invested assets		4	4
Accrued investment income		0	0
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures		0	0
Liabilities
Interest-sensitive contract liabilities		0	0
Funds Held under Reinsurance Agreements, Liability		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		1,180	1,231
Funds withheld at interest		0	0
Cash and cash equivalents		0	0
Short-term investments		0	0
Other invested assets		59	65
Accrued investment income		744	630
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures		0	0
Liabilities
Interest-sensitive contract liabilities		0	0
Funds Held under Reinsurance Agreements, Liability		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)		6,559	6,109
Policy loans		0	0
Funds withheld at interest		5,570	5,884
Cash and cash equivalents		0	0
Short-term investments		0	0
Other invested assets		681	689
Accrued investment income		0	0
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures		70	52
Liabilities
Interest-sensitive contract liabilities		21,867	23,065
Funds Held under Reinsurance Agreements, Liability		1,264	1,321
Long-term Debt, Fair Value		4,113	3,670
Mortgage loans on real estate (net of valuation allowances)		7,231	6,590
Policy loans		1,180	1,231
Funds withheld at interest		5,725	6,003
Cash and cash equivalents		2,820	2,927
Short-term investments		141	154
Other invested assets		1,091	1,140
Accrued investment income		744	630
Interest-sensitive contract liabilities		29,365	30,342
Funds Held under Reinsurance Agreements, Liability		369	363
Long-term debt		4,450	3,961
Fair Value Inputs Level 1 Member
Liabilities
Funds Held under Reinsurance Agreements, Liability		0	0
Fair Value Inputs Level 2 Member
Liabilities
Funds Held under Reinsurance Agreements, Liability		0	0
Fair Value Inputs Level 3 Member
Liabilities
Funds Held under Reinsurance Agreements, Liability		$ 369	$ 363

[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.