v3.20.1
Leases - Narrative (Details)
ft² in Thousands, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
Dec. 31, 2016
building
lease
Dec. 31, 2015
ft²
building
Dec. 31, 2019
USD ($)
Lessee, Lease, Description [Line Items]        
Operating lease, lease not yet commenced $ 586      
Finance lease, lease not yet commenced 16      
Property and equipment, net $ 1,851     $ 1,731
Finance Obligation        
Lessee, Lease, Description [Line Items]        
Number of buildings under contract | building   2 2  
Rentable square feet under contract | ft²     423  
Ownership acquired under the sale leaseback contract 49.00% 49.00% 49.00%  
Ownership percentage retained following lease termination   100.00%    
Land Leases        
Lessee, Lease, Description [Line Items]        
Number of land agreement leases | lease   2    
Lease term   75 years    
Commitments under Land Leases $ 161      
Financing obligation 78      
Future land lease payments $ 1,700      
Future land lease payments, percentage allocated to operating lease 51.00%      
Land Leases | Land        
Lessee, Lease, Description [Line Items]        
Property and equipment, net $ 65      
Minimum        
Lessee, Lease, Description [Line Items]        
Operating lease, lease not yet commenced, term 5 years      
Finance lease, lease not yet commenced, term 11 years      
Maximum        
Lessee, Lease, Description [Line Items]        
Operating lease, lease not yet commenced, term 11 years      
Finance lease, lease not yet commenced, term 5 years