XML 59 R50.htm IDEA: XBRL DOCUMENT v3.20.4
Accounting Policies - Additional Information (Detail) - GBP (£)
£ / shares in Units, £ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Jan. 01, 2019
Disclosure of expected impact of initial application of new standards or interpretations [line items]        
Increase in cash at bank and in hand and overdraft £ 7,795.4 £ 9,334.3 £ 8,336.7  
Gain loss recognised in revaluation and retranslation on financial instruments (301.1) 8.9 245.7  
Retained earnings [1],[2] 5,303.4 9,080.3 8,689.9  
Other reserves [1],[2] 532.3 1,043.9 (169.9)  
Payments due to vendors (earnout agreements) [2] 65.2 167.8 143.4  
Goodwill 8,096.3 [3] £ 13,181.7 [1],[2] 10,110.6 [3]  
goodwill impairment charge [3] £ 2,484.7   £ 47.7  
Diluted earnings (loss) per share [3] £ (2.364) £ 0.263 £ 0.679  
Basic earnings (loss) per share [3] £ (2.364) £ 0.265 £ 0.685  
Liabilities in respect of put options [member]        
Disclosure of expected impact of initial application of new standards or interpretations [line items]        
Gains (losses) recognised in profit or loss including exchange differences, fair value measurement, liabilities £ 0.6 £ 4.9 £ 10.8  
goodwill impairment charge £ 36.1 £ 0.0 £ 0.0  
Diluted earnings (loss) per share £ 0.214 £ 0.015 £ 0.186  
Basic earnings (loss) per share £ 0.214 £ 0.015 £ 0.186  
Payments Due To Vendors [Member]        
Disclosure of expected impact of initial application of new standards or interpretations [line items]        
Gain loss recognised in revaluation and retranslation on financial instruments £ 3.1 £ 5.3 £ 2.7  
Bottom of range [member]        
Disclosure of expected impact of initial application of new standards or interpretations [line items]        
Retained earnings       £ 73.8
Liabilities in respect of put options 22.1 39.2 22.3  
Payments due to vendors (earnout agreements) 13.3 19.5 10.1  
Goodwill 23.9 70.4 60.1  
Top of range [member]        
Disclosure of expected impact of initial application of new standards or interpretations [line items]        
Retained earnings       £ 517.4
Other reserves £ 60.2 £ 51.9 £ 59.6  
[1] Figures have been restated to be in accordance with IAS 32 Financial Instruments: Presentation, as described in the accounting policies.
[2] Figures have been restated to be in accordance with IAS 39 Financial Instruments: Recognition and Measurement, as described in the accounting policies.
[3] Figures have been restated as described in the accounting policies.