Basis of Presentation Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Cash Provided by (Used in) Investing Activities			$ 4,575	$ 4,471
Net Cash Provided by (Used in) Operating Activities			(3,680)	(3,249)
Restricted Cash and Cash Equivalents	$ 1,734	$ 1,276	1,734	1,276
Cash Flows Between Transferor and Transferee, Beneficial Interest			5,400	5,400
Other (Income) Expense - Net [Member]
Defined benefit plan net periodic benefit cost other than service cost	$ (1)		$ 4	20
Cost of Products Sold [Member]
Defined benefit plan net periodic benefit cost other than service cost		0		9
Selling, General and Administrative Expenses [Member]
Defined benefit plan net periodic benefit cost other than service cost		$ 0		$ 11