XML 232 R107.htm IDEA: XBRL DOCUMENT v3.23.2
Post employment benefits - Plan assets and liabilities by type of post employment benefit and country (Details) - GBP (£)
£ in Millions
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country £ 594 £ 1,165 £ 447
Plan assets      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country 6,846 8,399 9,892
Plan liabilities      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country (6,252) (7,234) £ (9,445)
Pensions | Plan assets | United Kingdom      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country 4,578 6,041  
Pensions | Plan assets | Ireland      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country 1,588 1,645  
Pensions | Plan assets | United States      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country 441 453  
Pensions | Plan assets | Other      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country 180 191  
Pensions | Plan liabilities | United Kingdom      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country (4,041) (4,897)  
Pensions | Plan liabilities | Ireland      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country (1,310) (1,409)  
Pensions | Plan liabilities | United States      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country (411) (408)  
Pensions | Plan liabilities | Other      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country (194) (212)  
Post employment medical | Plan assets      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country 2 2  
Post employment medical | Plan liabilities      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country (227) (225)  
Other post employment | Plan assets      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country 57 67  
Other post employment | Plan liabilities      
Disclosure of net defined benefit liability (asset) [line items]      
Plan asset and liabilities by type and country £ (69) £ (83)