v3.19.3.a.u2
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 Millions
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Assets      
Prepaid expenses and other current assets $ 713   $ 366
Property, plant and equipment, net 10,396   11,330
Operating lease right-of-use assets 1,218    
Other assets 808   572
Liabilities      
Accrued liabilities and other 2,905   2,094
Current portion of long-term debt and finance leases 1,785   2,568
Long-term debt and finance leases, net of current portion 11,634   9,404
Other long-term liabilities 2,655   2,710
Equity      
Accumulated deficit $ (6,083)   $ (5,318)
Adoption of ASU 2016-02 [Member]      
Assets      
Prepaid expenses and other current assets   $ 366  
Property, plant and equipment, net   9,713  
Operating lease right-of-use assets   1,286  
Other assets   431  
Liabilities      
Accrued liabilities and other   2,212  
Current portion of long-term debt and finance leases   2,568  
Long-term debt and finance leases, net of current portion   9,404  
Other long-term liabilities   2,023  
Equity      
Accumulated deficit   (5,221)  
Adoption of ASU 2016-02 [Member] | Adjustments from Adoption of New Lease Standard [Member]      
Assets      
Property, plant and equipment, net   (1,617)  
Operating lease right-of-use assets   1,286  
Other assets   (141)  
Liabilities      
Accrued liabilities and other   118  
Other long-term liabilities   (687)  
Equity      
Accumulated deficit   $ 97