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Related Party Transactions - Additional Information (Detail) - GBP (£)
£ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Penguin Random House [member]      
Disclosure of transactions between related parties [line items]      
Dividends received from joint ventures and associates   £ 1 £ 64
Academy of Pop [Member]      
Disclosure of transactions between related parties [line items]      
Proportion of ownership interest in associate 40.00%    
Amounts payable, related party transactions £ 7