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v3.19.2

Debt financing - Analysis of Future Anticipated Cash Flows Related to Debt (Detail) - GBP (£) £ in Millions | Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2018
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Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Future anticipated cash flows including short-term overdrafts | £ (7,701.3) | £ (8,453.3) | £ (8,756.3)
Effect of discounting/financing rates | 1,257.1 | 1,793.4 | 1,903.4
Debt financing | (6,444.2) | (6,659.9) | (6,852.9)
Borrowings [member] |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Future anticipated cash flows | (7,365.4) | (8,011.3) | (8,456.9)
Borrowings [member] | Within one year [member] |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Future anticipated cash flows | (936.6) | (748.4) | (175.7)
Borrowings [member] | Between one and two years [member] |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Future anticipated cash flows | (327.7) | (596.8) | (925.6)
Borrowings [member] | Between two and three years [member] |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Future anticipated cash flows | (990.0) | (937.1) | (594.8)
Borrowings [member] | Between three and four years [member] |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Future anticipated cash flows | (496.1) | (742.5) | (1,351.2)
Borrowings [member] | Between four and five years [member] |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Future anticipated cash flows | (1,114.7) | (786.8) | (496.7)
Borrowings [member] | Over five years [member] |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Future anticipated cash flows | (3,500.3) | (4,199.7) | (4,912.9)
Bank overdrafts [member] | Within one year [member] |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Future anticipated cash flows | £ (335.9) | £ (442.0) | £ (299.4)

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