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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
The table below presents the components of property, plant and equipment.
 
December 31,
 
2017
 
2016
 
(in millions)
Land
$
34

 
$
53

Buildings and improvements
404

 
437

Machinery, equipment, furniture and fixtures
1,959

 
1,857

Leasehold improvements
376

 
337

Gross property, plant and equipment
2,773

 
2,684

Accumulated depreciation and amortization
(1,663
)
 
(1,577
)
Property, plant and equipment, net
$
1,110

 
$
1,107