XML 360 R114.htm IDEA: XBRL DOCUMENT v3.24.2.u1
Post employment benefits - Sensitivity analyses of potential impacts on consolidated income statement and on plan liabilities (Details)
$ in Millions
 12 Months Ended
Jun. 30, 2024
USD ($)
yr
Jun. 30, 2023
USD ($)
 [2]
Jun. 30, 2022
USD ($)
 [1],[2]
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit $ 6,001 $ 5,547 [1] $ 5,897
Profit for the year $ 4,166 $ 4,479 [3] $ 4,410
Discount rate      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Percentage of reasonably possible increase in actuarial assumption 0.50%    
Percentage of reasonably possible decrease in actuarial assumption 0.50%    
Inflation      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Percentage of reasonably possible increase in actuarial assumption 0.50%    
Percentage of reasonably possible decrease in actuarial assumption 0.50%    
Life expectancy      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Duration of reasonably possible increase in actuarial assumption | yr 1    
United Kingdom | Effect of 0.5% increase in discount rate      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit $ 2    
Profit for the year 16    
Plan liabilities 307    
United Kingdom | Effect of 0.5% decrease in discount rate      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit (2)    
Profit for the year (16)    
Plan liabilities (339)    
United Kingdom | Effect of 0.5% increase in inflation      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit (2)    
Profit for the year (9)    
Plan liabilities (201)    
United Kingdom | Effect of 0.5% decrease in inflation      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit 2    
Profit for the year 9    
Plan liabilities 200    
United Kingdom | Effect of one year increase in life expectancy      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit 0    
Profit for the year (6)    
Plan liabilities (162)    
Ireland | Effect of 0.5% increase in discount rate      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit 1    
Profit for the year 6    
Plan liabilities 101    
Ireland | Effect of 0.5% decrease in discount rate      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit (1)    
Profit for the year (5)    
Plan liabilities (112)    
Ireland | Effect of 0.5% increase in inflation      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit 0    
Profit for the year (2)    
Plan liabilities (62)    
Ireland | Effect of 0.5% decrease in inflation      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit 0    
Profit for the year 3    
Plan liabilities 73    
Ireland | Effect of one year increase in life expectancy      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit 0    
Profit for the year (2)    
Plan liabilities (67)    
United States | Effect of 0.5% increase in discount rate      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit 2    
Profit for the year 2    
Plan liabilities 27    
United States | Effect of 0.5% decrease in discount rate      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit (2)    
Profit for the year (2)    
Plan liabilities (30)    
United States | Effect of 0.5% increase in inflation      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit (1)    
Profit for the year (1)    
Plan liabilities (10)    
United States | Effect of 0.5% decrease in inflation      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit 1    
Profit for the year 1    
Plan liabilities 9    
United States | Effect of one year increase in life expectancy      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Operating profit 0    
Profit for the year (1)    
Plan liabilities $ (17)    
[1] (1) See pages 238-240 for an explanation under Accounting information and policies.
[2] (1)  See pages 238-240 for an explanation under Accounting information and policies.
[3] (1)  See pages 238-240 for an explanation under Accounting information and policies.