Derivative Instruments (Schedule Of Offsetting Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Financial Assets
Derivative Instruments, Gross amount of recognized assets	$ 6,604	$ 9,705
Derivative Instruments, Gross amounts offset	(3,010)	(4,008)
Derivative Instruments, Net amount of assets	3,594	5,697
Derivative Instruments, Cash collateral	(3,273)	(5,574)
Derivative Instruments, Non-cash collateral	(321)	(123)
Derivative Instruments, Net amount
Embedded Derivative Instruments, Gross amount of recognized assets	2,667	2,551
Embedded Derivative Instruments, Gross amounts offset
Embedded Derivative Instruments, Net amount of assets	2,667	2,551
Embedded Derivative Instruments, Cash collateral
Embedded Derivative Instruments, Non-cash collateral
Embedded Derivative Instruments, Net amount	2,667	2,551
Securities Lending and Reverse Repurchase Agreements, Cash collateral received		(12)
Total, Gross amount of recognized assets	9,271	12,256
Total, Gross amounts offset	(3,010)	(4,008)
Total, Net amount of assets	6,261	8,248
Total, Cash collateral	(3,273)	(5,574)
Total, Non-cash collateral	(321)	(123)
Total, Net amount	2,667	2,551
Financial Liabilities
Derivative Instruments, Gross amount of recognized liabilities	260	779
Derivative Instruments, Gross amounts offset	(50)	(70)
Derivative Instruments, Net amount of liabilities	210	709
Derivative Instruments, Cash collateral	(172)	(709)
Derivative Instruments, Non-cash collateral	(38)
Derivative Instruments, Net amount
Embedded Derivative Instruments, Gross amount of recognized liabilities	4,950	6,519
Embedded Derivative Instruments, Gross amounts offset
Embedded Derivative Instruments, Net amount of liabilities	4,950	6,519
Embedded Derivative Instruments, Cash collateral
Embedded Derivative Instruments, Non-cash collateral
Embedded Derivative Instruments, Net amount	4,950	6,519
Total, Gross amount of recognized liabilities	(5,210)	(7,298)
Total, Gross amounts offset	(50)	(70)
Total, Net amount of liabilities	5,160	7,228
Total, Cash collateral	(172)	(709)
Total, Non-cash collateral	(38)
Total, Net amount	4,950	6,519
Excess non-cash collateral received	1,100	$ 409
Excess Non Cash Collateral Pledged	$ 8