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Reconciliation of operating (loss)/profit to headline operating profit - Summary of reconciliation of operating profit to headline operating profit (Detail) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Reconciliation of operating profit to headline operating profit [Abstract]
Operating profit	£ 538.7	£ 483.6
Amortisation and impairment of acquired intangible assets	31.5	30.1
Losses on disposal of investments and subsidiaries	48.1	1.0
Gains (losses) on remeasurement of equity interests arising from change in scope of ownership	60.4	0.0
Litigation settlement	0.0	21.7
Restructuring and transformation costs	75.3	34.3
Restructuring costs in relation to COVID-19	5.9	19.7
Headline operating profit	£ 639.1	£ 590.4

X

- Definition

The amount of expense relating to restructuring. Restructuring is a programme that is planned and controlled by management and materially changes either the scope of a business undertaken by an entity or the manner in which that business is conducted. Such programmes include: (a) the sale or termination of a line of business; (b) closure of business locations in a country or region or the relocation of activities from one country or region to another; (c) changes in management structure; and (d) fundamental reorganisations that have a material effect on the nature and focus of the entity's operations.

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- Definition

The gain on settlements of litigation.

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The profit (loss) from operating activities of the entity. [Refer: Profit (loss)]

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Amortization and impairment of acquired intangible assets.

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Gains (losses) on disposals of investments and subsidiaries.

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Gains losses on remeasurement of equity interests arising from change in scope of ownership.

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Headline operating profit/loss.

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Reconciliation of operating profit to headline operating profit

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Restructuring costs due to covid nineteen pandemic

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