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Property, Plant And Equipment (Summary Of Property, Plant And Equipment) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]      
Total $ 521 $ 632  
Less accumulated depreciation (352) (385)  
Net property, plant and equipment 169 247  
Depreciation 35 61 $ 54
Land [Member]      
Property, Plant and Equipment [Line Items]      
Total 7 13  
Greenford UK Building [Member]      
Property, Plant and Equipment [Line Items]      
Proceeds from Sale of Buildings 33    
Gain (Loss) on Sale of Properties 23    
Birmingham AL Building [Member]      
Property, Plant and Equipment [Line Items]      
Proceeds from Sale of Buildings 6    
Building Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Total $ 140 198  
Building Improvements [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 5 years    
Building Improvements [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 44 years    
Other Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Total $ 374 $ 421  
Other Machinery and Equipment [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 3 years    
Other Machinery and Equipment [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 25 years