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Financial Risk Management - Summary of Financial Assets and Liabilities by Class (Detail) - USD ($) $ in Millions | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
--- | --- | --- | ---
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | $ 1,199 | $ 1,353 |
Cash and cash equivalents | 15,871 | 14,153 | $ 10,319
Trade and other receivables | 2,925 | 2,733 |
Loans to equity accounted investments | 13 | 644 |
Total financial assets | 20,008 | 18,883 |
Non-financial assets | 91,985 | 98,123 |
Total assets | 111,993 | 117,006 | 118,953
Other financial liabilities | 1,231 | 1,500 |
Trade and other payables | 5,791 | 5,422 |
Bank overdrafts and short-term borrowings | 58 | 45 | 43
Bank loans | 2,555 | 2,281 |
Notes and debentures | 23,298 | 27,041 |
Finance leases | 802 | 897 |
Other | 92 | 210 |
Total financial liabilities | 33,827 | 37,396 |
Non-financial liabilities | 17,496 | 16,884 |
Total liabilities | 51,323 | 54,280 | $ 58,882
Current cross currency and interest rate swaps [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial liabilities | 121 | 250 |
Current other derivative contracts [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial liabilities | 17 | 144 |
Non-current cross currency and interest rate swaps [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial liabilities | 1,092 | 1,095 |
Non-current other derivative contracts [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial liabilities | 1 | 11 |
Current cross currency and interest rate swaps [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 12 |  |
Current other derivative contracts [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 170 | 41 |
Current available for sale shares and other investments [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 18 | 31 |
Non-current cross currency and interest rate swaps [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 396 | 605 |
Non-current other derivative contracts [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 195 | 332 |
Non-current available for sale shares and other investments [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 408 | 344 |
Loans and receivables [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Cash and cash equivalents | 15,871 | 14,153 |
Trade and other receivables | 1,799 | 1,813 |
Loans to equity accounted investments | 13 | 644 |
Total financial assets | 17,683 | 16,610 |
Available for sale securities [member] | Level 3 [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 80 | 70 |
Total financial assets | 80 | 70 |
Available for sale securities [member] | Level 3 [member] | Non-current available for sale shares and other investments [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 80 | 70 |
Held at fair value through profit or loss [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 1,146 | 1,256 |
Trade and other receivables | 1,126 | 920 |
Total financial assets | 2,272 | 2,176 |
Other financial liabilities | 487 | 186 |
Trade and other payables | 377 | 502 |
Total financial liabilities | 864 | 688 |
Held at fair value through profit or loss [member] | Current cross currency and interest rate swaps [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial liabilities | 171 | (4) |
Held at fair value through profit or loss [member] | Current other derivative contracts [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial liabilities | 17 | 144 |
Held at fair value through profit or loss [member] | Non-current cross currency and interest rate swaps [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial liabilities | 298 | 42 |
Held at fair value through profit or loss [member] | Non-current other derivative contracts [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial liabilities | 1 | 4 |
Held at fair value through profit or loss [member] | Current cross currency and interest rate swaps [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 12 |  |
Held at fair value through profit or loss [member] | Current other derivative contracts [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 170 | 41 |
Held at fair value through profit or loss [member] | Current available for sale shares and other investments [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 18 | 31 |
Held at fair value through profit or loss [member] | Non-current cross currency and interest rate swaps [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 423 | 578 |
Held at fair value through profit or loss [member] | Non-current other derivative contracts [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 195 | 332 |
Held at fair value through profit or loss [member] | Non-current available for sale shares and other investments [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | 328 | 274 |
Cash flow hedges [member] | Level 2 [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | (27) | 27 |
Total financial assets | (27) | 27 |
Other financial liabilities | 744 | 1,314 |
Total financial liabilities | 744 | 1,314 |
Cash flow hedges [member] | Level 2 [member] | Current cross currency and interest rate swaps [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial liabilities | (50) | 254 |
Cash flow hedges [member] | Level 2 [member] | Non-current cross currency and interest rate swaps [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial liabilities | 794 | 1,053 |
Cash flow hedges [member] | Level 2 [member] | Non-current other derivative contracts [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial liabilities |  | 7 |
Cash flow hedges [member] | Level 2 [member] | Non-current cross currency and interest rate swaps [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Other financial assets | (27) | 27 |
Other financial assets and liabilities at amortized cost [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Trade and other payables | 5,414 | 4,920 |
Bank overdrafts and short-term borrowings | 58 | 45 |
Bank loans | 2,555 | 2,281 |
Notes and debentures | 23,298 | 27,041 |
Finance leases | 802 | 897 |
Other | 92 | 210 |
Total financial liabilities | $ 32,219 | $ 35,394 |

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