Income Taxes (Unaudited) Effective Income Tax Rate Reconciliation (Details 1) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Tax Disclosure [Abstract]
Federal and foreign income tax expense	$ 253	$ 206	$ 350	$ 393
Effective income tax rate	17.70%	18.00%	17.50%	17.30%
Change in Federal and foreign income tax expense	$ 47		$ (43)
Change in Federal and foreign income tax expense, percent	23.00%		(11.00%)
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	$ 68	$ 46	$ 103	$ 90
Income Tax Reconciliation Deductions FDII	12	15	18	30
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ 18	$ 25	34	$ 46
Tax expense, nondeductible Goodwill, amount			$ 17