Income Taxes (Unaudited) Effective Income Tax Rate Reconciliation (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Federal and foreign income tax expense	$ 181	$ 122	$ 564	$ 460
Effective income tax rate	15.50%	11.60%	16.50%	14.80%
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	$ 45	$ 89	$ 135	$ 171
IncomeTaxReconciliationDeductionsFDII	$ 30	$ 17	$ 46	$ 26