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Net Debt - Summary of Maturity Profile of Financial Liabilities Based on the Contractual Amounts (Detail) - USD ($) $ in Millions | Jun. 30, 2020 | Jun. 30, 2019
--- | --- | ---
Disclosure of financial liabilities [line items] |  |
Bank loans, debentures and other loans, contractual amount | $ 21,631 | $ 22,869
Expected future interest payments, contractual amount | 7,596 | 8,399
Derivatives related to debentures, contractual amount | 2,134 | 2,086
Other derivatives, contractual amount | 60 | 65
Obligations under lease liabilities, contractual amount | 3,935 | 1,028
Trade and other payables, contractual amount | 5,623 | 6,560
Total, contractual amount | 40,979 | 41,007
Bank loans, debentures and other loans, carrying amount | 23,605 | 24,113
Expected future interest payments, carrying amount | 0 | 0
Derivatives related to debentures, carrying amount | 1,579 | 958
Other derivatives, carrying amount | 60 | 65
Obligations under lease liabilities, carrying amount | 3,443 | 715
Trade and other payables, carrying amount | 5,623 | 6,560
Total financial liabilities | 34,310 | 32,411
Due not later than one year [member] |  |
Disclosure of financial liabilities [line items] |  |
Bank loans, debentures and other loans, contractual amount | 4,138 | 1,587
Expected future interest payments, contractual amount | 813 | 864
Derivatives related to debentures, contractual amount | 260 | 200
Other derivatives, contractual amount | 60 | 64
Obligations under lease liabilities, contractual amount | 927 | 110
Trade and other payables, contractual amount | 5,622 | 6,555
Total, contractual amount | 11,820 | 9,380
Later than one year and not later than two years [member] |  |
Disclosure of financial liabilities [line items] |  |
Bank loans, debentures and other loans, contractual amount | 1,665 | 4,107
Expected future interest payments, contractual amount | 702 | 775
Derivatives related to debentures, contractual amount | 81 | 226
Other derivatives, contractual amount | 0 | 1
Obligations under lease liabilities, contractual amount | 630 | 110
Trade and other payables, contractual amount | 1 | 5
Total, contractual amount | 3,079 | 5,224
Later than two years and not later than five years [member] |  |
Disclosure of financial liabilities [line items] |  |
Bank loans, debentures and other loans, contractual amount | 5,727 | 5,513
Expected future interest payments, contractual amount | 1,713 | 1,864
Derivatives related to debentures, contractual amount | 819 | 558
Other derivatives, contractual amount | 0 | 0
Obligations under lease liabilities, contractual amount | 1,335 | 307
Trade and other payables, contractual amount | 0 | 0
Total, contractual amount | 9,594 | 8,242
Due later than five years [member] |  |
Disclosure of financial liabilities [line items] |  |
Bank loans, debentures and other loans, contractual amount | 10,101 | 11,662
Expected future interest payments, contractual amount | 4,368 | 4,896
Derivatives related to debentures, contractual amount | 974 | 1,102
Other derivatives, contractual amount | 0 | 0
Obligations under lease liabilities, contractual amount | 1,043 | 501
Trade and other payables, contractual amount | 0 | 0
Total, contractual amount | $ 16,486 | $ 18,161

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