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Financial Risk Management - Summary of Financial Assets and Liabilities by Class (Detail) - USD ($) $ in Millions | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019
--- | --- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets | $ 1,840 | $ 2,606 |
Cash and cash equivalents | 15,246 | 13,426 | $ 15,613
Trade and other receivables | 6,396 | 3,631 |
Loans to equity accounted investments |  | 40 |
Total financial assets | 22,996 | 19,185 |
Non-financial assets | 85,931 | 86,548 |
Total assets | 108,927 | 105,733 | 101,811
Other financial liabilities | 1,276 | 1,639 |
Current other financial liabilities | 130 | 225 |
Trade and other payables | 7,027 | 5,768 |
Bank loans | 2,300 |  |
Notes and debentures | 14,769 | 21,045 |
Lease liabilities | 3,896 | 3,443 |
Total financial liabilities | 29,110 | 34,310 |
Non-financial liabilities | 24,212 | 19,248 |
Total liabilities | 53,322 | 53,558 | $ 50,058
Financial assets held at amortised cost [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Cash and cash equivalents | 15,246 | 13,426 |
Loans to equity accounted investments |  | 40 |
Financial liabilities held at amortised cost [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Bank loans | 2,260 | 2,492 |
Notes and debentures | 14,769 | 21,045 |
Other | 58 | 68 |
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 |
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 | 52 | 60 |
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 | 586 | 1,414 |
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 | 6,277 | 5,354 |
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 | 574 | 269 |
Current other financial liabilities [Member] | Financial liabilities held at amortised cost [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Current other financial liabilities | 78 |  |
Non current other financial liabilities [Member] | Financial liabilities held at amortised cost [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial liabilities | 560 |  |
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 | 20 | 3 |
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 | 207 | 45 |
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 | 3 | 36 |
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 | 1,123 | 2,009 |
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 | 152 | 159 |
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 | 31 | 32 |
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 | 46 | 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 | 304 | 322 |
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 | 2,363 | 1,633 |
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 | $ 3,547 | $ 1,480 |

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