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Financial Risk Management - Summary of Movement of Interest Bearing Liabilities and Related Derivatives (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Disclosure of reconciliation of liabilities arising from financing activities [Line Items] |  |  |
Proceeds from interest bearing liabilities | $ 528 | $ 1,577 | $ 7,239
Settlements of debt related instruments | (218) | 36 | 156
Repayment of interest bearing liabilities | (4,188) | (7,114) | $ (2,781)
Change from Net financing cash flows | (3,878) |  |
Bank loans [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [Line Items] |  |  |
At the beginning of the financial year | 2,281 |  |
Proceeds from interest bearing liabilities | 500 |  |
Repayment of interest bearing liabilities | (221) |  |
Change from Net financing cash flows | 279 |  |
Other movements: |  |  |
Other interest bearing liabilities/derivative related changes | (5) |  |
At the end of the financial year | 2,555 | 2,281 |
Notes and debentures [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [Line Items] |  |  |
At the beginning of the financial year | 27,041 |  |
Repayment of interest bearing liabilities | (3,736) |  |
Change from Net financing cash flows | (3,736) |  |
Other movements: |  |  |
Interest rate impacts | (353) |  |
Foreign exchange impacts | 245 |  |
Other interest bearing liabilities/derivative related changes | 101 |  |
At the end of the financial year | 23,298 | 27,041 |
Finance leases [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [Line Items] |  |  |
At the beginning of the financial year | 897 |  |
Repayment of interest bearing liabilities | (81) |  |
Change from Net financing cash flows | (81) |  |
Other movements: |  |  |
Foreign exchange impacts | (9) |  |
Liabilities transferred to held for sale | (5) |  |
At the end of the financial year | 802 | 897 |
Bank overdraft and short-term borrowings [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [Line Items] |  |  |
At the beginning of the financial year | 45 |  |
Other movements: |  |  |
Other interest bearing liabilities/derivative related changes | 13 |  |
At the end of the financial year | 58 | 45 |
Other interest bearing liabilities [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [Line Items] |  |  |
At the beginning of the financial year | 210 |  |
Proceeds from interest bearing liabilities | 28 |  |
Repayment of interest bearing liabilities | (150) |  |
Change from Net financing cash flows | (122) |  |
Other movements: |  |  |
Other interest bearing liabilities/derivative related changes | 4 |  |
At the end of the financial year | 92 | 210 |
Cross currency and interest rate swaps [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [Line Items] |  |  |
At the beginning of the financial year | 740 |  |
Settlements of debt related instruments | (218) |  |
Change from Net financing cash flows | (218) |  |
Other movements: |  |  |
Interest rate impacts | 329 |  |
Foreign exchange impacts | (254) |  |
Other interest bearing liabilities/derivative related changes | 208 |  |
At the end of the financial year | $ 805 | $ 740 |

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