Retirement Benefit Obligations - Schedule of Amounts Recognized in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Jun. 30, 2023 |
Jun. 30, 2022 |
|
| Defined Benefit Plan Disclosure [Line Items] | ||
| Actuarial losses (gains) | $ 452 | $ 446 |
| Prior service cost (benefit) | (21) | (25) |
| Net amounts recognized | 431 | 421 |
| Domestic Pension Benefits | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Actuarial losses (gains) | 118 | 126 |
| Prior service cost (benefit) | 0 | 0 |
| Net amounts recognized | 118 | 126 |
| Foreign Pension Benefits | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Actuarial losses (gains) | 342 | 325 |
| Prior service cost (benefit) | 7 | 7 |
| Net amounts recognized | 349 | 332 |
| Postretirement Benefits | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Actuarial losses (gains) | (8) | (5) |
| Prior service cost (benefit) | (28) | (32) |
| Net amounts recognized | $ (36) | $ (37) |