Risk Management (Summary Of Fair Values And Location In Condensed Consolidated Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Fair value of derivative assets		$ 4
Fair value of derivative liabilities		5
Designated As Hedging Instruments | Foreign exchange contracts | Other assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets		0
Designated As Hedging Instruments | Foreign exchange contracts | Other Liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities		1
Not Designated As Hedging Instruments
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	1	4
Fair value of derivative liabilities	7	4
Not Designated As Hedging Instruments | Foreign exchange contracts | Other assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	1	4
Not Designated As Hedging Instruments | Foreign exchange contracts | Other Liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	5	1
Not Designated As Hedging Instruments | Interest agreements | Other assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Not Designated As Hedging Instruments | Interest agreements | Other Liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	$ 2	$ 3