Derivative Instruments (Schedule Of Offsetting Assets And Liabilities) (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Financial Assets
Derivative Instruments, Gross amount of recognized assets	$ 8,553,000,000	$ 6,483,000,000
Derivative Instruments, Gross amounts offset	(3,099,000,000)	(2,964,000,000)
Derivative Instruments, Net amount of assets	5,454,000,000	3,519,000,000
Derivative Instruments, Cash collateral	(4,502,000,000)	(3,200,000,000)
Derivative Instruments, Non-cash collateral	(952,000,000)	(319,000,000)
Derivative Instruments, Net amount
Embedded Derivative Instruments, Gross amount of recognized assets	1,519,000,000	1,206,000,000
Embedded Derivative Instruments, Gross amounts offset
Embedded Derivative Instruments, Net amount of assets	1,519,000,000	1,206,000,000
Embedded Derivative Instruments, Cash collateral
Embedded Derivative Instruments, Non-cash collateral
Embedded Derivative Instruments, Net amount	1,519,000,000	1,206,000,000
Total, Gross amount of recognized assets	10,072,000,000	7,689,000,000
Total, Gross amounts offset	(3,099,000,000)	(2,964,000,000)
Total, Net amount of assets	6,973,000,000	4,725,000,000
Total, Cash collateral	(4,502,000,000)	(3,200,000,000)
Total, Non-cash collateral	(952,000,000)	(319,000,000)
Total, Net amount	1,519,000,000	1,206,000,000
Financial Liabilities
Derivative Instruments, Gross amount of recognized liabilities	1,870,000,000	304,000,000
Derivative Instruments, Gross amounts offset	(1,242,000,000)	(50,000,000)
Derivative Instruments, Net amount of liabilities	628,000,000	254,000,000
Derivative Instruments, Cash collateral	(470,000,000)	(157,000,000)
Derivative Instruments, Non-cash collateral	(158,000,000)	(46,000,000)
Derivative Instruments, Net amount		51,000,000
Embedded Derivative Instruments, Gross amount of recognized liabilities	7,174,000,000	4,783,000,000
Embedded Derivative Instruments, Gross amounts offset
Embedded Derivative Instruments, Net amount of liabilities	7,174,000,000	4,783,000,000
Embedded Derivative Instruments, Cash collateral
Embedded Derivative Instruments, Non-cash collateral
Embedded Derivative Instruments, Net amount	7,174,000,000	4,783,000,000
Total, Gross amount of recognized liabilities	9,044,000,000	5,087,000,000
Total, Gross amounts offset	(1,242,000,000)	(50,000,000)
Total, Net amount of liabilities	7,802,000,000	5,037,000,000
Total, Cash collateral	(470,000,000)	(157,000,000)
Total, Non-cash collateral	(158,000,000)	(46,000,000)
Total, Net amount	7,174,000,000	4,834,000,000
Excess Non Cash Collateral Received	826,000,000	1,100,000,000
Excess Non Cash Collateral Pledged	$ 320,000,000	$ 0