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Discontinued Operations (Tables)
 12 Months Ended
Dec. 31, 2017
Discontinued Operations, Held-for-sale [Member]  
Schedule of asset and liabilities classified as held for sale [Table Text Block]
 
 
December 31,
2017
 
December 31,
2016
 
 
(in millions)
Carrying amount of assets held for sale:
 
 
 
 
Cash
 
$
21

 
$
16

Inventories
 
149

 
150

Other current assets
 
16

 
11

Property and equipment, net
 
1,851

 
1,860

Goodwill
 
796

 
1,068

Intangible assets, net
 
477

 
480

Other noncurrent assets
 
3

 
3

Total assets held for sale
 
$
3,313

 
$
3,588

 
 
 
 
 
Carrying amount of liabilities associated with assets held for sale:
 
 
 
 
Long term debt
 
$
21

 
$
—

Other current and noncurrent liabilities
 
54

 
48

Total liabilities associated with assets held for sale
 
$
75

 
$
48