Income Taxes (Unaudited) Effective Income Tax Rate Reconciliation (Details 1) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Federal and foreign income tax expense	$ 206	$ 175	$ 393	$ 331
Effective income tax rate	18.00%	17.70%	17.30%	16.70%
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	$ 46	$ 38	$ 90	$ 78
Income Tax Reconciliation Deductions FDII	15	14	30	29
Income Taxes Receivable	583		583		$ 1,500
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ 25	$ 14	$ 46	$ 27