Annual report pursuant to Section 13 and 15(d)

Leases - Supplemental Balance Sheet Information (Details)

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Leases - Supplemental Balance Sheet Information (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Leases    
Operating lease ROU assets (1) $ 397  
Operating lease ROU asset location us-gaap:OtherAssetsNoncurrent  
Current operating lease liabilities (2) $ 64  
Current operating lease location us-gaap:OtherLiabilitiesCurrent  
Operating lease liabilities (3) $ 349  
Operating lease liabilities location us-gaap:OtherLiabilitiesNoncurrent  
Total operating lease liabilities $ 413  
Property and equipment, at cost 2,806 $ 2,685
Accumulated depreciation (1,455) (1,363)
Property and equipment, net 1,351 $ 1,322
Current finance lease liabilities (2) $ 18  
Finance lease current liabilities location us-gaap:OtherLiabilitiesCurrent  
Finance lease liabilities (3) $ 163  
Finance lease liabilities location us-gaap:OtherLiabilitiesNoncurrent  
Total finance lease liabilities $ 181  
Finance lease ROU assets (4)    
Leases    
Property and equipment, at cost 282  
Accumulated depreciation (129)  
Property and equipment, net $ 153  
Finance Lease ROU asset location us-gaap:PropertyPlantAndEquipmentNet