Annual report pursuant to Section 13 and 15(d)

Leases - Remaining Lease Term And Lease Expense (Details)

v3.20.4
Leases - Remaining Lease Term And Lease Expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Jan. 01, 2019
Leases        
Lease, Practical Expedients, Package [true false] true      
Lease, Practical Expedient, Use of Hindsight [true false] false      
Right of use asset $ 371 $ 397    
Short term operating lease liabilities 63 64    
Operating lease liabilities (3) $ 320 349    
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      
Components of lease expense:        
Operating Lease Cost $ 87 78    
Finance lease cost        
Depreciation of leased assets 19 20    
Interest on lease liabilities 8 9    
Total finance lease cost $ 27 $ 29    
Rent expense     $ 80  
Minimum        
Leases        
Operating lease, remaining lease term 1 year      
Finance lease, remaining lease term 1 year      
Maximum        
Leases        
Operating lease, remaining lease term 14 years      
Finance lease, remaining lease term 14 years      
Operating lease, option to extend, period 14 years      
Finance lease, option to extend, period 14 years      
Operating lease, terminate term 1 year      
Finance lease, terminate term 1 year      
Cumulative Effect, Period of Adoption, Adjustment        
Leases        
Right of use asset       $ 287
Short term operating lease liabilities       51
Operating lease liabilities (3)       259
Deferred Rent       $ 23