Revenue From Contracts With Customers - Additional Information (Detail) - GBP (£) £ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement [line items]
Liability for sales return	£ 31	£ 53	£ 83

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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