Income Taxes (Differences Between The 21 Percent Statutory Income Tax Rate And Effective Income Tax Rate) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Increase (decrease) resulting from:
Tax at statutory rate:	$ (146)	$ 771	$ 315
Tax-exempt income from municipal bonds	(20)	(20)	(20)
Dividend received exclusion	(21)	(20)	(17)
Effective Income Tax Rate Reconciliation, Tax Accounting Method Changes, Amount	(34)	0	0
Other	14	(7)	5
Total provision (benefit) for income taxes	$ (207)	$ 724	$ 283
Tax at statutory rate:
Tax at statutory rate (percentage):	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent	2.90%	(0.50%)	(1.30%)
Dividend received exclusion (percentage)	3.00%	(0.50%)	(1.10%)
Effective Income Tax Rate Reconciliation, Tax Accounting Method Changes, Percent	4.90%	0.00%	0.00%
Other (percentage)	(1.90%)	(0.30%)	0.30%
Effective tax, percentage	29.90%	19.70%	18.90%