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Financial Risk Management - Summary of Financial Assets and Liabilities by Class (Detail) - USD ($) $ in Millions | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
--- | --- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets | $ 2,606 | $ 1,390 |
Cash and cash equivalents | 13,426 | 15,613 | $ 15,871
Trade and other receivables | 3,631 | 3,775 |
Loans to equity accounted investments | 40 | 33 |
Total financial assets | 19,185 | 20,411 |
Non-financial assets | 85,598 | 80,450 |
Total assets | 104,783 | 100,861 | 111,993
Other financial liabilities | 1,639 | 1,023 |
Trade and other payables | 5,768 | 6,722 |
Bank overdrafts and short-term borrowings | 0 | 20 | 58
Notes and debentures | 21,045 | 21,529 |
Lease liabilities | 3,443 | 715 |
Total financial liabilities | 34,310 | 32,411 |
Non-financial liabilities | 18,227 | 16,626 |
Total liabilities | 52,537 | 49,037 | $ 51,323
Financial assets held at amortised cost [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Cash and cash equivalents | 13,426 | 15,613 |
Financial liabilities held at amortised cost [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Bank overdrafts and short-term borrowings | 0 | 20 |
Bank loans | 2,492 | 2,498 |
Notes and debentures | 21,045 | 21,529 |
Lease liabilities | 3,443 | 715 |
Other | 68 | 66 |
Current cross currency and interest rate swaps [member] | Financial liabilities held at fair value through profit or loss [member] | Level 2 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial liabilities | 165 | 63 |
Current other derivative contracts [member] | Financial liabilities held at fair value through profit or loss [member] | Levels 2 and 3 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial liabilities | 60 | 64 |
Non-current cross currency and interest rate swaps [member] | Financial liabilities held at fair value through profit or loss [member] | Level 2 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial liabilities | 1,414 | 895 |
Non-current other derivative contracts [member] | Financial liabilities held at fair value through profit or loss [member] | Levels 2 and 3 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial liabilities | 0 | 1 |
Trades and other payables [member] | Financial liabilities held at amortised cost [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Trade and other payables | 5,354 | 6,283 |
Provisionally priced trade payables [member] | Financial liabilities held at fair value through profit or loss [member] | Level 2 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Trade and other payables | 269 | 277 |
Current cross currency and interest rate swaps [member] | Financial assets held at fair value through profit or loss [member] | Level 2 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets | 3 | 15 |
Current other derivative contracts [member] | Financial assets held at fair value through profit or loss [member] | Levels 2 and 3 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets | 45 | 57 |
Current other investments [member] | Financial assets held at fair value through profit or loss [member] | Level 1 and 2 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets | 36 | 15 |
Non-current cross currency and interest rate swaps [member] | Financial assets held at fair value through profit or loss [member] | Level 2 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets | 2,009 | 739 |
Non-current other derivative contracts [member] | Financial assets held at fair value through profit or loss [member] | Levels 2 and 3 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets | 159 | 180 |
Non-current investment in shares [member] | Financial assets held at fair value through other comprehensive income [member] | Level 3 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets | 32 | 34 |
Non-current investment in shares [member] | Financial liabilities held at fair value through profit or loss [member] | Level 3 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets | 0 | 6 |
Non-current other investments [member] | Financial assets held at fair value through profit or loss [member] | Level 3 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets | 47 | 47 |
Non-current other investments [member] | Financial assets held at fair value through profit or loss [member] | Levels 1, 2 and 3 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets | 322 | 344 |
Trade and other receivable [member] | Financial assets held at amortised cost [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Trade and other receivables | 1,633 | 1,929 |
Loans to equity accounted investments | 40 | 33 |
Provisionally priced trade receivables [member] | Financial assets held at fair value through profit or loss [member] | Level 2 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Trade and other receivables | $ 1,480 | $ 1,446 |

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