v3.19.3.a.u2
Leases (Supplemental Balance Sheet Information Related to Leases) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Operating Lease [Abstract]    
Operating lease right-of-use assets $ 24,039 $ 0
Accounts payable and accrued liabilities 3,451  
Operating lease liabilities 21,804 0
Total operating lease obligation 25,255  
Finance Lease [Abstract]    
Property, plant and equipment, at cost 3,534  
Accumulated depreciation and amortization (1,296)  
Property, plant and equipment - net 2,238  
Current portion of long-term debt 162  
Long-term debt 1,872  
Total finance lease obligation $ 2,034 $ 1,911
Operating Lease, Weighted Average Remaining Lease Term 8 years 4 months 24 days  
Finance Lease, Weighted Average Remaining Lease Term 10 years 3 months 18 days  
Operating Lease, Weighted Average Discount Rate 4.20%  
Finance Lease, Weighted Average Discount Rate 8.40%