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Acquisition and disposal related costs - Provisional acquired balance sheet (Details)
$ in Millions
Mar. 15, 2021
USD ($)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]  
Accounts and other receivables $ 4.8
Inventories 6.7
Property, plant and equipment 9.5
Accounts payable 1.6
Accrued expenses 0.1
Net assets acquired $ 19.3