Employee Benefits, Restructuring and Post-retirement Employee Benefits Provisions - Summary of Employee Benefits, Restructuring and Post-retirement Employee Benefits Provisions (Detail) - USD ($) $ in Millions |
Jun. 30, 2026 |
Jun. 30, 2025 |
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|---|---|---|---|---|---|---|---|---|
| Provisions [abstract] | ||||||||
| Employee benefits | [1] | $ 2,171 | $ 1,879 | |||||
| Restructuring | [2] | 69 | 83 | |||||
| Post-retirement employee benefits | [3] | 367 | 336 | |||||
| Total provisions | 2,607 | 2,298 | ||||||
| Current | 2,174 | 1,893 | ||||||
| Non-current | $ 433 | $ 405 | ||||||
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