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Bank overdrafts, bonds and bank loans - Repayments Due on Corporate Bonds, Bank Loans and Overdrafts (Detail) - GBP (£) £ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Corporate bonds, bank loans and overdrafts | £ 12,845.3 | £ 15,082.5
Within one year [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Corporate bonds, bank loans and overdrafts | 8,798.0 | 9,447.7
Between one and two years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Corporate bonds, bank loans and overdrafts | 96.4 | 423.8
Between two and three years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Corporate bonds, bank loans and overdrafts | 590.4 | 761.0
Between three and four years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Corporate bonds, bank loans and overdrafts | 632.1 | 609.8
Between four and five years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Corporate bonds, bank loans and overdrafts | 554.3 | 670.1
Over five years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Corporate bonds, bank loans and overdrafts | £ 2,174.1 | £ 3,170.1

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