Quarterly report pursuant to Section 13 or 15(d)

Leases - Income Statement Location Table (Details)

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Leases - Income Statement Location Table (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Finance lease cost:    
Total lease cost $ 144 $ 284
Short-term lease cost 46 93
Variable lease cost 8 13
Operating costs and expenses [Member]    
Lessee, Lease, Description [Line Items]    
Operating lease cost [1],[2] 140 277
Depreciation and amortization expense [Member]    
Finance lease cost:    
Amortization of right-of-use assets 1 2
Interest expense, net of capitalized interest [Member]    
Finance lease cost:    
Interest on lease liabilities $ 3 $ 5
[1]
Includes $46 million and $93 million of short-term lease costs and $8 million and $13 million of variable lease costs incurred during the three and six months ended June 30, 2019, respectively.
[2]
Presented in cost of sales, operating and maintenance expense or selling, general and administrative expense consistent with the nature of the asset under lease.