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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, 2024	Dec. 31, 2023	Dec. 31, 2022
Increase (decrease) resulting from:
Tax at statutory rate:	$ 600	$ 478	$ (146)
Tax-exempt income from municipal bonds	(21)	(21)	(20)
Dividend received exclusion	(22)	(22)	(21)
Effective Income Tax Rate Reconciliation, Tax Accounting Method Changes, Amount	0	0	(34)
Other	9	(2)	14
Total provision (benefit) for income taxes	$ 566	$ 433	$ (207)
Tax at statutory rate:
Tax at statutory rate (percentage):	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent	(0.70%)	(0.90%)	2.90%
Dividend received exclusion (percentage)	(0.80%)	(1.00%)	3.00%
Effective Income Tax Rate Reconciliation, Tax Accounting Method Changes, Percent	0.00%	0.00%	4.90%
Other (percentage)	0.30%	(0.10%)	(2.00%)
Effective tax, percentage	19.80%	19.00%	29.80%

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