Other Income and Expense - Other Expense (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Schedule of other expense [Line Items]
Gain (Loss) on Disposition of Assets		$ (2)	$ (12)
Other Expenses		9	24
Other Expense [Member]
Schedule of other expense [Line Items]
Gain (Loss) on Disposition of Assets		2	21
Defined Benefit Plan, Other Cost (Credit)	[1]	5	3
Other Nonoperating Expense		2	0
Other Expenses		$ 9	$ 24

[1] (2) As of January 1, 2018, the Company retrospectively adopted ASU 2017-07, Compensation —Retirement Benefits. As such, $3 million of non-service costs associated with defined benefit plans for the three months ended March 31, 2017 were reclassified from Cost of Sales to Other Expense.