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Reinsurance (Schedule Of Assets In Support Of Reserves) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Ceded Credit Risk [Line Items]
Fixed maturity AFS securities	$ 99,736	$ 97,572	$ 103,317	$ 110,663	$ 118,711	$ 122,085	$ 122,215	$ 117,313
Trading securities	3,498	3,580	3,803	4,364	4,460	4,170	4,211	4,344
Equity securities	427	427	411	399	375	264	195	144
Mortgage loans on real estate	18,301	18,066	17,922	17,892	17,991	17,730	17,586	17,255
Derivative investments	3,594	3,455	3,167	4,573	5,697	5,075	4,730	3,482
Other investments	3,739	3,813	4,078	4,122	4,288	4,066	3,948	3,547
Cash and invested cash	3,343	1,472	1,567	1,960	2,612	2,614	2,389	1,350	$ 1,708	$ 2,563
Accrued investment income	1,253	1,283	1,226	1,247	1,189	1,297	1,254	1,301
Other assets	20,708	$ 19,991	$ 18,137	$ 18,467	18,519	$ 18,076	$ 18,125	$ 18,264
Athene Holding Ltd. [Member]
Ceded Credit Risk [Line Items]
Fixed maturity AFS securities	474				744
Trading securities	2,644				3,399
Equity securities	60				54
Mortgage loans on real estate	487				739
Derivative investments	39				93
Other investments	42				227
Cash and invested cash	26				110
Accrued investment income	35				33
Other assets	2				5
Total	3,809				5,404
Commercial [Member]
Ceded Credit Risk [Line Items]
Mortgage loans on real estate	$ 16,903				$ 17,089

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