Other (Income) Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Other Income and Expenses [Line Items]
Gain (Loss) on Sale/Revaluation of Assets/NCI	$ 35	$ 121	$ 51	$ 124
Other (income) expense - net	33	(13)	42	(10)
Other Income (Expense)	$ (2)	$ (134)	$ (9)	$ (134)