Employee Benefits Summary of Stock-Based Compensation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Expense	$ (636)	$ (845)	$ (649)
Share-based Payment Arrangement, Expense, Adjusted Tax Benefit	2
Share-based Payment Arrangement, Expense, Tax Benefit		(164)	(280)
Stock-based compensation expense, Net of Tax	638	681	369
Cost of Goods Sold
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Expense	(48)	(61)	(24)
Research and Development Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Expense	(289)	(379)	(232)
Selling, General and Administrative Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Expense	$ (299)	$ (405)	$ (393)