XML 69 R60.htm IDEA: XBRL DOCUMENT v3.10.0.1
Segmental analysis - Contributions by Geographical Area (Parenthetical) (Detail) - GBP (£)
£ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Disclosure of geographical areas [line items]      
Revenue £ 7,492.7 £ 7,650.4 [1],[2] £ 15,804.2 [1],[2]
Headline PBIT [3] 820.7 882.0 [2] 2,267.1 [2]
United States [member]      
Disclosure of geographical areas [line items]      
Revenue 2,454.1 2,660.8 5,336.3
Revenue less pass-through costs 2,038.6 2,279.3 4,535.3
Headline PBIT £ 328.9 £ 382.2 £ 937.4
[1] Prior year figures have been restated for the impact of the adoption of IFRS 15: Revenue from Contracts with Customers and the change in income statement presentation, as described in note 2.
[2] 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.
[3] A reconciliation from profit before interest and taxation (PBIT) to headline PBIT is provided in note 21.