Income Taxes (Unaudited) Effective Income Tax Rate Reconciliation (Details 1) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Federal and foreign income tax expense	$ 185	$ 171
Effective income tax rate	17.60%	16.50%
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	$ 41	$ 31
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Amount	$ 13	$ 13