Schedule II-Condensed Financial Information Of Registrant (Statements Of Income) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net investment income									$ 877	$ 1,005	$ 970
Net realized gains (losses) on financial instruments									182	67	(206)
Administrative fees and other revenue									6,315	6,208	5,920
Total revenues	$ 31,824	$ 31,158	$ 29,264	$ 29,621	$ 27,407	$ 26,674	$ 25,466	$ 24,666	121,867	104,213	92,105
Interest expense									784	746	753
Loss on extinguishment of debt									36	2	11
Loss before income tax credits and equity in net income of subsidiaries									6,238	5,985	5,068
Net income	$ 551	$ 222	$ 2,276	$ 1,523	$ 934	$ 1,183	$ 1,139	$ 1,551	4,572	4,807	3,750
Parent Company [Member]
Net investment income									65	81	39
Net realized gains (losses) on financial instruments									28	(85)	(61)
Administrative fees and other revenue									22	22	2
Total revenues									115	18	(20)
General and administrative expense									169	88	86
Interest expense									779	723	723
Loss on extinguishment of debt									36	2	11
Total expenses									984	813	820
Loss before income tax credits and equity in net income of subsidiaries									(869)	(795)	(840)
Income tax credits									(386)	(251)	(238)
Equity in net income of subsidiaries									5,055	5,351	4,352
Net income									$ 4,572	$ 4,807	$ 3,750