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SUMMARY OF ACCOUNTING POLICIES - Property and Equipment, Net (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Property, Plant and Equipment      
Property and equipment, gross $ 5,736,679 $ 5,785,590  
Accumulated depreciation and amortization (3,520,688) (3,449,377)  
Property and equipment, net 2,215,991 2,336,213  
Depreciation 422,407 433,413 $ 434,432
Machinery and equipment      
Property, Plant and Equipment      
Property and equipment, gross $ 3,265,387 3,305,335  
Machinery and equipment | Minimum      
Property, Plant and Equipment      
Depreciable life (in years) 3 years    
Machinery and equipment | Maximum      
Property, Plant and Equipment      
Depreciable life (in years) 10 years    
Buildings      
Property, Plant and Equipment      
Depreciable life (in years) 30 years    
Property and equipment, gross $ 1,085,887 1,111,708  
Leasehold improvements      
Property, Plant and Equipment      
Property and equipment, gross $ 510,404 453,119  
Leasehold improvements | Maximum      
Property, Plant and Equipment      
Depreciable life (in years) 30 years    
Furniture, fixtures, computer equipment and software      
Property, Plant and Equipment      
Property and equipment, gross $ 491,959 501,994  
Furniture, fixtures, computer equipment and software | Minimum      
Property, Plant and Equipment      
Depreciable life (in years) 3 years    
Furniture, fixtures, computer equipment and software | Maximum      
Property, Plant and Equipment      
Depreciable life (in years) 7 years    
Land      
Property, Plant and Equipment      
Property and equipment, gross $ 112,016 121,976  
Construction-in-progress      
Property, Plant and Equipment      
Property and equipment, gross $ 271,026 $ 291,458