Impact of Derivative Instruments in Consolidated Balance Sheet Other (Details) - USD ($) $ in Millions	Dec. 31, 2017		Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 11		$ 3
Derivative Liabilities	9		6
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	10
Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	1
Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets			3
Foreign Exchange Contract [Member] | Other Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	1		4
Energy Related Derivative [Member] | Other Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	5		2
Energy Related Derivative [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	3
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	11		3
Derivative Liabilities	1		4
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0		0
Derivative Liabilities	8		2
Not Designated as Hedging Instrument [Member] | Energy Related Derivative [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0		0
Derivative Liabilities	$ 8	[1]	$ 2

[1] Included in Other accrued liabilities in the accompanying consolidated balance sheet.