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Condensed Consolidated Balance Sheets (Parenthetical) - £ / shares
9 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Statement of Financial Position [Abstract]    
Common stock, par value £ 0.5 £ 0.5
Common stock, shares authorized, unlimited Unlimited Unlimited
Common stock, issued 417,744,958 412,333,087
Common stock, outstanding 408,551,020 404,346,256
Treasury Stock, Shares 9,193,938 7,986,831