Annual report pursuant to Section 13 and 15(d)

Leases - Effect of adoption (Details)

v3.19.3.a.u2
Leases - Effect of adoption (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Assets      
Other current assets $ 416 $ 358 $ 360
Property and equipment, at cost 3,780 3,394 3,765
Accumulated depreciation (1,518) (1,281) (1,296)
Other assets 2,013 2,257 1,861
Liabilities      
Current portion of debt 60 13 17
Other current liabilities 94 68 32
Long-term debt 15,416 13,370 13,371
Other long-term liabilities 1,047 873 864
Retained earnings $ 13,748 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 40 years    
Finance lease, remaining lease term 40 years    
Option to extend period - Operating 10 years    
Option to extend period - Finance 10 years    
Operating lease, terminate term 1 year    
Finance lease, terminate term 1 year    
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)