XML 168 R155.htm IDEA: XBRL DOCUMENT v3.24.0.1
Fair value estimation - Maturity of financial instruments (Details) - GBP (£)
£ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Fair value estimation    
Net inflow/(outflow) £ (149) £ (60)
Less than 1 year    
Fair value estimation    
Net inflow/(outflow) (35) (10)
Between 1 and 2 years    
Fair value estimation    
Net inflow/(outflow) (64) (12)
Between 2 and 5 years    
Fair value estimation    
Net inflow/(outflow) (35) (28)
Over 5 years    
Fair value estimation    
Net inflow/(outflow) (15) (10)
Cross-currency interest rate swaps    
Fair value estimation    
Outflow (1,982) (661)
Inflow 1,818 610
Cross-currency interest rate swaps | Less than 1 year    
Fair value estimation    
Outflow (64) (18)
Inflow 20 12
Cross-currency interest rate swaps | Between 1 and 2 years    
Fair value estimation    
Outflow (460) (14)
Inflow 390 5
Cross-currency interest rate swaps | Between 2 and 5 years    
Fair value estimation    
Outflow (909) (471)
Inflow 874 445
Cross-currency interest rate swaps | Over 5 years    
Fair value estimation    
Outflow (549) (158)
Inflow 534 148
Interest rate swaps    
Fair value estimation    
Outflow (4) (20)
Inflow 19 9
Interest rate swaps | Less than 1 year    
Fair value estimation    
Outflow (1) (8)
Inflow 10 2
Interest rate swaps | Between 1 and 2 years    
Fair value estimation    
Outflow (3) (6)
Inflow 9 3
Interest rate swaps | Between 2 and 5 years    
Fair value estimation    
Outflow   (6)
Inflow   4
Foreign exchange swaps    
Fair value estimation    
Outflow (15) (385)
Inflow 15 387
Foreign exchange swaps | Less than 1 year    
Fair value estimation    
Outflow (15) (385)
Inflow £ 15 387
Foreign exchange forwards    
Fair value estimation    
Outflow   (34)
Inflow   34
Foreign exchange forwards | Less than 1 year    
Fair value estimation    
Outflow   (34)
Inflow   £ 34