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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Other Contractual Obligations
The following table presents details of our commitments and other contractual obligations, which are currently estimated to be paid in 2015 and thereafter: 
 
 Payment Obligations by Year
 
2015
 
2016
 
2017
 
2018
 
2019
 
Thereafter
 
 Total
 
 (In millions)
Operating leases
$
197

 
$
142

 
$
95

 
$
56

 
$
24

 
$
23

 
$
537

Inventory and related purchase obligations
725

 
—

 
—

 
—

 
—

 
—

 
725

Other obligations
155

 
36

 
4

 
—

 
—

 
—

 
195

Long-term debt and related interest
50

 
49

 
49

 
550

 
36

 
1,368

 
2,102

 
$
1,127

 
$
227

 
$
148

 
$
606

 
$
60

 
$
1,391

 
$
3,559