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Trade and other payables - Summary of Trade and Other Payables, Amounts Falling Due within One Year (Detail) - GBP (£) £ in Millions	Jun. 30, 2018	Dec. 31, 2017		Jun. 30, 2017
Trade and other current payables [abstract]
Trade payables	£ 9,611.7	£ 9,893.0		£ 9,087.5
Deferred income	1,284.5	1,212.1		1,188.3
Payments due to vendors (earnout agreements)	193.7	180.7		283.9
Liabilities in respect of put option agreements with vendors	50.0	38.6		36.7
Fair value of derivatives	2.2	3.5		2.8
Other creditors and accruals	2,874.5	2,913.2		2,829.0
Total	£ 14,016.6	£ 14,241.1	[1]	£ 13,428.2	[1]
[1] Prior year figures have been restated for the impact of the adoption of IFRS 15: Revenue from Contracts with Customers, as described in note 2.

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- Definition

The amount of current derivative financial liabilities. [Refer: Derivative financial liabilities]

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The amount of current trade payables and current other payables. [Refer: Current trade payables; Other current payables]

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The current amount of payment due to suppliers for goods and services used in entity's business. [Refer: Current liabilities; Trade payables]

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