Quarterly report pursuant to Section 13 or 15(d)

Leases - Effect of adoption (Details)

v3.19.1
Leases - Effect of adoption (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Assets      
Other current assets $ 371 $ 358 $ 360
Property and equipment, at cost 3,562 3,394 3,765
Accumulated depreciation (1,357) (1,281) (1,296)
Other assets 1,246 979 583
Liabilities      
Current portion of debt 13 13 17
Other current liabilities 102 68 32
Long-term debt 14,026 13,370 13,371
Other long-term liabilities 978 873 864
Retained earnings $ 13,484 13,642 $ 13,644
Practical expedients to not reassess true    
Practical expedient entities to use hindsight true    
Operating lease, existence of option to extend true    
Finance lease, existence of option to extend true    
Operating lease, existence of option to terminate true    
Finance lease, existence of option to terminate true    
Minimum      
Liabilities      
Operating lease, remaining lease term 1 year    
Finance lease, remaining lease term 1 year    
Maximum      
Liabilities      
Operating lease, remaining lease term 41 years    
Finance lease, remaining lease term 41 years    
Operating lease, terminate term 1 year    
Finance lease, terminate term 1 year    
Option to extend period - Operating 10 years    
Option to extend period - Finance 10 years    
ASU 2016-02 | Adjustment      
Assets      
Other current assets   (2)  
Property and equipment, at cost   (371)  
Accumulated depreciation   15  
Other assets   396  
Liabilities      
Current portion of debt   (4)  
Other current liabilities   36  
Long-term debt   (1)  
Other long-term liabilities   9  
Retained earnings   $ (2)