Income Taxes (Unaudited) (Details 1) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Tax Uncertainties [Abstract]
Unrecognized Tax Benefits, Period Increase (Decrease)	$ 55
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	65
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	40
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	60
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Effective Income Tax Rate Reconciliation, Deduction, Other, Amount	47	$ 80
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	22
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount	42
Income Tax Expense (Benefit)	$ 133	$ 120
Effective income tax rate	17.20%	17.80%