XML 390 R147.htm IDEA: XBRL DOCUMENT v3.23.1
Net debt - Reconciliation - Additional Information (Details)
£ in Millions
 12 Months Ended
Dec. 31, 2022
GBP (£)
€ / £
Dec. 31, 2022
GBP (£)
$ / £
Dec. 31, 2022
GBP (£)
Dec. 31, 2021
GBP (£)
Dec. 31, 2020
GBP (£)
Net debt          
Foreign exchange gain (loss) on debt and derivatives     £ (74) £ 30  
Strengthening (weakening) of currency 0.06 0.14      
Cash paid on debt-related foreign exchange forward contracts     4 19  
Cash decrease (increase) for borrowings     (2,378) 1,149  
Proceeds from new debt     (2,383) (5) £ (1,690)
Decrease (increase) in overdraft     (865) 972  
Debt repayments     844 167 1,352
Cash outflow from payment of interest on debt     26 15  
Amount of cash decrease (increase) for derivatives     (7) 31  
Cash outflow (inflow) on settlement of debt-related foreign exchange forward contracts     (26) 19 24
Cash outflow from payment of interest on derivatives     19 12  
Cash outflow for leases     114 94  
Capital element of lease payments     104 88 85
Interest element of lease payments     10 6 £ 7
Book value £ 3,574 £ 3,574 3,574 1,256  
Bond Debt          
Net debt          
Book value 2,987 2,987 2,987 1,254  
Fair market value £ 2,826 £ 2,826 £ 2,826 £ 1,272