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Other Long-Term Liabilities (Tables)
 12 Months Ended
Dec. 31, 2017
Other Liabilities Disclosure [Abstract]  
Summary of Other Long-term Liabilities
Our other long-term liabilities are summarized as follows (in millions):
 
December 31,
 
2016
 
2017
Long-term capital lease obligations
$
5,080

 
$
8,438

Long-term finance lease obligations
2,439

 
4,745

Construction liabilities
714

 
1,350

Tax contingencies
1,395

 
1,004

Long-term deferred tax liabilities
392

 
990

Other
2,587

 
4,448

Total other long-term liabilities
$
12,607

 
$
20,975
Schedule of Long-term Capital Lease Obligations
Long-term capital lease obligations are as follows (in millions):
 
December 31, 2017
Gross capital lease obligations
$
14,811

Less imputed interest
(534
)
Present value of net minimum lease payments
14,277

Less current portion of capital lease obligations
(5,839
)
Total long-term capital lease obligations
$
8,438
Schedule of Long-term Finance Lease Obligations
Long-term finance lease obligations are as follows (in millions):
 
December 31, 2017
Gross finance lease obligations
$
6,265

Less imputed interest
(1,238
)
Present value of net minimum lease payments
5,027

Less current portion of finance lease obligations
(282
)
Total long-term finance lease obligations
$
4,745