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Acquisitions - Book Values of Identifiable Assets and Liabilities Acquired and Their Fair Value (Detail) - GBP (£) £ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Book value [member] |  |
Disclosure of detailed information about business combination [line items] |  |
Intangible assets |  | £ 0.8
Property, plant and equipment | £ 3.1 | 5.5
Cash | 5.0 | 28.9
Trade receivables due within one year | 43.7 | 74.4
Other current assets | 20.3 | 20.1
Total assets | 72.1 | 129.7
Current liabilities | (42.8) | (76.0)
Trade and other payables due after one year | (2.4) | (10.2)
Provisions |  | (0.1)
Total liabilities | (45.2) | (86.3)
Net assets | 26.9 | 43.4
Fair value adjustments [member] |  |
Disclosure of detailed information about business combination [line items] |  |
Intangible assets | 40.3 | 79.0
Total assets | 40.3 | 79.0
Trade and other payables due after one year | (13.5) | (20.5)
Deferred tax liabilities | (9.9) | (16.8)
Provisions | (0.4) | (4.8)
Total liabilities | (23.8) | (42.1)
Net assets | 16.5 | 36.9
At Fair Value [member] |  |
Disclosure of detailed information about business combination [line items] |  |
Intangible assets | 40.3 | 79.8
Property, plant and equipment | 3.1 | 5.5
Cash | 5.0 | 28.9
Trade receivables due within one year | 43.7 | 74.4
Other current assets | 20.3 | 20.1
Total assets | 112.4 | 208.7
Current liabilities | (42.8) | (76.0)
Trade and other payables due after one year | (15.9) | (30.7)
Deferred tax liabilities | (9.9) | (16.8)
Provisions | (0.4) | (4.9)
Total liabilities | (69.0) | (128.4)
Net assets | 43.4 | 80.3
Non-controlling interests | (6.3) | (13.9)
Fair value of equity stake in associate undertakings before acquisition of controlling interest | (3.1) | (5.7)
Goodwill | 141.6 | 314.3
Consideration | 175.6 | 375.0
Consideration satisfied by: |  |
Cash | 127.4 | 213.7
Payments due to vendors | £ 48.2 | £ 161.3

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- Definition The acquisition-date fair value of equity interest in the acquiree held by the acquirer immediately before the acquisition date in a business combination achieved in stages. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph p -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_p_i&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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- Definition The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_f&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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- Definition The amount recognised as of the acquisition date for cash and cash equivalents acquired in a business combination. [Refer: Cash and cash equivalents; Business combinations [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_i&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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