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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
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