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, 2022	Dec. 31, 2021
Reported Value Measurement [Member]
Assets
Mortgage loans on real estate (net of valuation allowances)	[1]	$ 6,535	$ 6,283
Policy loans	[1]	1,221	1,234
Funds withheld at interest	[1]	6,672	6,747
Cash and cash equivalents	[1]	1,735	1,810
Short-term investments	[1]	47	23
Other invested assets	[1]	954	910
Accrued investment income	[1]	578	533
Liabilities
Interest-sensitive contract liabilities	[1]	20,834	18,625
Funds Held under Reinsurance Agreements, Liability	[1]	1,646	1,658
Long-term debt	[1]	3,667	3,667
Collateral finance and securitization notes	[1]	166	180
Estimate of Fair Value Measurement [Member]
Assets
Mortgage loans on real estate (net of valuation allowances)		6,382	6,580
Policy loans		1,221	1,234
Funds withheld at interest		6,795	7,075
Cash and cash equivalents		1,735	1,810
Short-term investments		47	23
Other invested assets		900	907
Accrued investment income		578	533
Liabilities
Interest-sensitive contract liabilities		21,046	19,540
Funds Held under Reinsurance Agreements, Liability		1,556	1,657
Long-term Debt, Fair Value		3,614	3,886
Collateral finance and securitization notes		141	153
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		1,735	1,810
Short-term investments		47	23
Other invested assets		5	6
Accrued investment income		0	0
Liabilities
Interest-sensitive contract liabilities		0	0
Funds Held under Reinsurance Agreements, Liability		0	0
Long-term Debt, Fair Value		0	0
Collateral finance and securitization notes		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		1,221	1,234
Funds withheld at interest		0	0
Cash and cash equivalents		0	0
Short-term investments		0	0
Other invested assets		58	70
Accrued investment income		578	533
Liabilities
Interest-sensitive contract liabilities		0	0
Funds Held under Reinsurance Agreements, Liability		0	0
Long-term Debt, Fair Value		0	0
Collateral finance and securitization notes		0	0
Estimate of Fair Value Measurement [Member] | Fair Value Inputs Level 3 Member
Assets
Mortgage loans on real estate (net of valuation allowances)		6,382	6,580
Policy loans		0	0
Funds withheld at interest		6,795	7,075
Cash and cash equivalents		0	0
Short-term investments		0	0
Other invested assets		837	831
Accrued investment income		0	0
Liabilities
Interest-sensitive contract liabilities		21,046	19,540
Funds Held under Reinsurance Agreements, Liability		1,556	1,657
Long-term Debt, Fair Value		3,614	3,886
Collateral finance and securitization notes		141	153
Mortgage loans on real estate (net of valuation allowances)		6,535	6,283
Policy loans		1,221	1,234
Funds withheld at interest		6,737	6,954
Cash and cash equivalents		2,709	2,948
Short-term investments		315	87
Other invested assets		3,033	3,070
Accrued investment income		578	533
Interest-sensitive contract liabilities		28,083	26,377
Funds Held under Reinsurance Agreements, Liability		147	61
Long-term debt		3,667	3,667
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		$ 147	$ 61

[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.