Income Taxes (Unaudited) (Details 1) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Federal and foreign income tax expense	$ 171	$ 159
Effective income tax rate	16.50%	15.90%
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	$ 31	$ 20
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount	$ 13	26
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount		$ 8