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CONSOLIDATED BALANCE SHEETS (Parenthetical)
$ in Millions
Dec. 31, 2022
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Allowance and other receivables, net of allowance | $ $ 0.4 $ 0.8
Common stock, shares authorized (in shares) 40,000,000 761,875,318,444
Common stock, shares issued (in shares) 28,944,000 761,864,262,444
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  
Deferred shares    
Common stock, shares authorized (in shares) 0 761,835,318,444
Common stock, shares issued (in shares) 0 761,835,318,444
Common stock, shares outstanding (in shares)   761,835,318,444