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Post employment benefits - Amounts charged to consolidated income statement for group's defined benefit post employment plans and consolidated statement of comprehensive income (Details) - GBP (£)
£ in Millions
12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Disclosure of net defined benefit liability (asset) [line items]      
Current service cost and administrative expenses £ (76) £ (107) £ (105)
Past service (losses)/gains – ordinary activities (1) 34 0
Past service losses – exceptional 0 0 (5)
Gains on curtailments and settlements 2 34 18
Charge to operating profit (75) (39) (92)
Net finance income in respect of post employment plans 44 10 5
Charge before taxation (31) (29) (87)
Actual returns less amounts included in finance income (1,435) (1,432) (6)
Experience (losses)/gains (226) (35) 80
Changes in financial assumptions 958 2,133 125
Changes in demographic assumptions 53 (40) (183)
Other comprehensive (loss)/income (650) 626 16
Changes in the surplus restriction 7 (11) 0
Total other comprehensive (loss)/income (643) 615 16
Ireland      
Disclosure of net defined benefit liability (asset) [line items]      
Charge before taxation 1 45 4
Net settlement gain   27  
Past service gain   (28)  
United Kingdom      
Disclosure of net defined benefit liability (asset) [line items]      
Charge before taxation £ 15 £ (27) (46)
Guaranteed minimum pension equalisation | United Kingdom      
Disclosure of net defined benefit liability (asset) [line items]      
Past service losses – exceptional     £ (5)