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Discontinued Operations - Summary of Cash Flows from Discontinued Operations (Detail) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2021 | Jun. 30, 2020
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |
Net operating cash flows | $ 474 |  |
Net investing cash flows | (443) |  |
Net financing cash flows | (13) |  |
Net increase in cash and cash equivalents from Discontinued operations | 18 |  |
Less Cash and cash equivalents | (15,613) | $ (15,246) | $ (13,426)
Discontinued operations [member] |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |
Net operating cash flows | 474 |  |
Net investing cash flows | (443) |  |
Net financing cash flows | (13) |  |
Net increase in cash and cash equivalents from Discontinued operations | 18 |  |
Net proceeds received from the sale of Onshore US | 10,531 |  |
Less Cash and cash equivalents | (104) |  |
Proceeds from divestment of Onshore US, net of its cash | 10,427 |  |
Total cash impact | $ 10,445 |  |

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