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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Oct. 01, 2021
Oct. 01, 2020
Property, Plant and Equipment [Line Items]            
Percentage of fair value in excess of carrying amount           42.00%
Advertising reimbursements   $ 49 $ 22 $ 49    
Foreign earnings repatriated $ 203          
Non-compete agreements            
Property, Plant and Equipment [Line Items]            
Finite lived intangible assets life   5 years        
Trade names and associated trademarks            
Property, Plant and Equipment [Line Items]            
Finite lived intangible assets life   5 years        
Reporting units excluding Mobile Storage and Mobile Storage International            
Property, Plant and Equipment [Line Items]            
Percentage of fair value in excess of carrying amount         59.00%  
Mobile Storage            
Property, Plant and Equipment [Line Items]            
Percentage of fair value in excess of carrying amount         10.00%  
Mobile Storage International            
Property, Plant and Equipment [Line Items]            
Percentage of fair value in excess of carrying amount         17.00%  
Sales of rental equipment            
Property, Plant and Equipment [Line Items]            
Property, plant and equipment, weighted average salvage value, percentage of cost 11.00% 11.00%        
Minimum | Customer relationships            
Property, Plant and Equipment [Line Items]            
Finite lived intangible assets life   5 years        
Minimum | Sales of rental equipment            
Property, Plant and Equipment [Line Items]            
Property, plant and equipment useful life   2 years        
Property, plant and equipment salvage value 0.00% 0.00%        
Minimum | Property and Equipment            
Property, Plant and Equipment [Line Items]            
Property, plant and equipment useful life   2 years        
Maximum | Customer relationships            
Property, Plant and Equipment [Line Items]            
Finite lived intangible assets life   15 years        
Maximum | Sales of rental equipment            
Property, Plant and Equipment [Line Items]            
Property, plant and equipment useful life   20 years        
Property, plant and equipment salvage value 50.00% 50.00%        
Maximum | Property and Equipment            
Property, Plant and Equipment [Line Items]            
Property, plant and equipment useful life   39 years        
BakerCorp            
Property, Plant and Equipment [Line Items]            
Percentage of fair value in excess of carrying amount           22.00%