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Exceptional items - Schedule of exceptional cash flows (Details) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
Disclosure Of Exceptional Items [Line Items] |  |  |  |  |
Net cash inflow from operating activities | $ 4,105 | $ 3,636 | [1] | $ 5,213 | [1]
Thalidomide |  |  |  |  |
Disclosure Of Exceptional Items [Line Items] |  |  |  |  |
Net cash inflow from operating activities | (17) | (16) |  | (22) |
Winding down Russian operations |  |  |  |  |
Disclosure Of Exceptional Items [Line Items] |  |  |  |  |
Net cash inflow from operating activities | (2) | (16) |  | (18) |
Supply Chain Agility Programme |  |  |  |  |
Disclosure Of Exceptional Items [Line Items] |  |  |  |  |
Net cash inflow from operating activities | (26) | (14) |  | 0 |
Distribution termination fee |  |  |  |  |
Disclosure Of Exceptional Items [Line Items] |  |  |  |  |
Net cash inflow from operating activities | (55) | 0 |  | 0 |
Donations |  |  |  |  |
Disclosure Of Exceptional Items [Line Items] |  |  |  |  |
Net cash inflow from operating activities | 0 | 0 |  | (50) |
Total cash payments |  |  |  |  |
Disclosure Of Exceptional Items [Line Items] |  |  |  |  |
Net cash inflow from operating activities | (188) | (46) |  | (90) |
Ongoing Litigation In North America |  |  |  |  |
Disclosure Of Exceptional Items [Line Items] |  |  |  |  |
Net cash inflow from operating activities | $ (88) | $ 0 |  | $ 0 |
[1] | (1) See pages 238-240 for an explanation under Accounting information and policies.

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