Derivatives and Hedging Activities (Impact Of Derivative Instruments In Consolidated Balance Sheet) (Details) - USD ($) $ in Millions		Dec. 31, 2015		Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Derivative Liabilities		$ 8		$ 18
Derivative Assets		5		17
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities		1		14
Derivative Assets		5		16
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities		7		4
Derivative Assets		0		1
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities		0		2	[1]
Derivative Assets		0		1	[2]
Energy Related Derivative [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities		7	[3]	2	[1]
Derivative Assets		0		0
Cash Flow Hedging [Member] | Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	[1]	1		14
Derivative Assets		$ 5	[2]	$ 16	[4]

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

[2] Included in Other current assets in the accompanying consolidated balance sheet.

[3] Includes $4 million recorded in Other accrued liabilities and $3 million recorded in Other liabilities in the accompanying consolidated balance sheet.

[4] Includes $14 million recorded in Other current assets and $2 million recorded in Deferred charges and other assets in the accompanying consolidated balance sheet.