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LEASES (Details)
$ in Millions
 12 Months Ended
Apr. 17, 2020
USD ($)
hydrogenPlants
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Aug. 01, 2020
USD ($)
Lessee, Lease, Description [Line Items]          
Number of Hydrogen Plants Sold | hydrogenPlants 5        
Proceeds from sale of assets   $ 7.2 $ 543.1 $ 36.3  
Gain (Loss) on Disposition of Property Plant Equipment   3.0 477.8 $ 29.9  
Operating Lease, Liability   635.3      
Lease right of use assets   636.0 836.5    
Sale and Leaseback Transaction, Gain (Loss), Net   $ 0.0      
Lessee, Lease Not Yet Commenced, Term Of Contract   15 years      
Lessee, Leases Not Yet Commenced, Liability   $ 34.1      
Air Products and Chemical, Inc. [Member]          
Lessee, Lease, Description [Line Items]          
Proceeds from sale of assets $ 530.0        
Gain (Loss) on Disposition of Property Plant Equipment   $ 471.1 $ 471.1    
Air Products and Chemical, Inc. [Member] | Transition Service Agreement [Member]          
Lessee, Lease, Description [Line Items]          
Supply Commitment, Period 18 months        
Hydrogen Supply [Member] | Air Products and Chemical, Inc. [Member]          
Lessee, Lease, Description [Line Items]          
Non-cancelable operating lease term         15 years
Operating Lease, Liability         $ 504.0
Lease right of use assets         $ 504.0