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Summary of Significant Accounting Policies - Schedule of Cumulative Effect of Changes Made to Consolidated Balance Sheet for Adoption of New Lease Standard (Detail) - USD ($)
$ in Thousands
Jun. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Assets      
Prepaid expenses and other current assets $ 569,748   $ 365,671
Property, plant and equipment, net 10,082,458   11,330,077
Operating lease right-of-use assets 1,248,277    
Other assets 842,978   571,657
Liabilities      
Accrued liabilities and other 2,622,943   2,094,253
Current portion of long-term debt and finance leases 1,791,085   2,567,699
Long-term debt and finance leases, net of current portion 11,234,401   9,403,672
Other long-term liabilities 2,655,720   2,710,403
Equity      
Accumulated deficit $ (6,331,639)   $ (5,317,832)
Adoption of ASU 2016-02 [Member]      
Assets      
Prepaid expenses and other current assets   $ 365,371  
Property, plant and equipment, net   9,712,704  
Operating lease right-of-use assets   1,285,617  
Other assets   430,335  
Liabilities      
Accrued liabilities and other   2,211,970  
Current portion of long-term debt and finance leases   2,567,699  
Long-term debt and finance leases, net of current portion   9,403,672  
Other long-term liabilities   2,022,646  
Equity      
Accumulated deficit   (5,221,170)  
Adoption of ASU 2016-02 [Member] | Adjustments from Adoption of New Lease Standard [Member]      
Assets      
Prepaid expenses and other current assets   (300)  
Property, plant and equipment, net   (1,617,373)  
Operating lease right-of-use assets   1,285,617  
Other assets   (141,322)  
Liabilities      
Accrued liabilities and other   117,717  
Other long-term liabilities   (687,757)  
Equity      
Accumulated deficit   $ 96,662