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Share of results of associates (Detail) - Associates - GBP (£) £ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Disclosure of associates [line items]
Share of exceptional (losses)/gains	£ 76.1	£ (11.7)
Acquired intangibles [member]
Disclosure of associates [line items]
Share of exceptional (losses)/gains	£ (76.1)		£ (11.7)

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- Definition

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

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- Definition

Share of exceptional gains (losses) of associates.

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