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CONSOLIDATED BALANCE SHEETS (Parenthetical)
$ in Millions
Dec. 31, 2023
USD ($)
$ / shares
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Allowance and other receivables, net of allowance | $ $ 0.7 $ 0.4
Common stock, shares authorized (in shares) 40,000,000 40,000,000
Common stock, shares issued (in shares) 28,944,000 28,944,000
Ordinary shares    
Common stock, par value (in GBP per share) | (per share) $ 0.50 $ 0.50
Common stock, shares authorized (in shares) 40,000,000 40,000,000
Common stock, shares issued (in shares) 28,944,000 28,944,000
Common stock, shares outstanding (in shares) 28,944,000 28,944,000