Schedule II-Condensed Financial Information Of Registrant (Statements Of Income) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net investment income									$ 1,005	$ 970	$ 867
Net realized losses on financial instruments									131	(203)	200
Total other-than-temporary impairment losses on investments									(53)	(29)	(35)
Portion of other-than-temporary impairment losses recognized in other comprehensive income									6	3	2
Other-than-temporary impairment losses recognized in income									(47)	(26)	(33)
Other revenue									8,968	5,920	5,413
Total revenues (losses)	$ 27,407	$ 26,674	$ 25,466	$ 24,666	$ 23,373	$ 23,251	$ 22,944	$ 22,537	104,213	92,105	90,040
Interest expense									746	753	739
Loss on extinguishment of debt									2	11	282
Loss before income tax credits and equity in net income of subsidiaries									5,985	5,068	3,964
Net income	$ 934	$ 1,183	$ 1,139	$ 1,551	$ 424	$ 960	$ 1,054	$ 1,312	4,807	3,750	3,843
Parent Company [Member]
Net investment income									81	39	64
Net realized losses on financial instruments									(65)	(46)	(18)
Total other-than-temporary impairment losses on investments									(23)	(15)	(7)
Portion of other-than-temporary impairment losses recognized in other comprehensive income									(3)	0	0
Other-than-temporary impairment losses recognized in income									(20)	(15)	(7)
Other revenue									22	2	0
Total revenues (losses)									18	(20)	39
General and administrative expense									88	86	437
Interest expense									723	723	727
Loss on extinguishment of debt									2	11	283
Total expenses									813	820	1,447
Loss before income tax credits and equity in net income of subsidiaries									(795)	(840)	(1,408)
Income tax credits									(251)	(238)	(216)
Equity in net income of subsidiaries									5,351	4,352	5,035
Net income									$ 4,807	$ 3,750	$ 3,843