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CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical)
$ in Millions
Sep. 25, 2022
USD ($)
$ / shares
shares
Sep. 25, 2022
£ / shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2021
£ / shares
Accounts and other receivables, net of allowance | $ $ 0.7   $ 0.8  
Ordinary shares        
Common stock, par value (in GBP per share) | (per share) $ 0.50 £ 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      
Common stock, shares outstanding (in shares) 28,944,000      
Deferred shares        
Common stock, par value (in GBP per share) | £ / shares   £ 0.0001   £ 0.0001
Common stock, shares authorized (in shares) 761,835,318,444   761,835,318,444  
Common stock, shares issued (in shares) 761,835,318,444   761,835,318,444  
Common stock, shares outstanding (in shares) 761,835,318,444   761,835,318,444