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Financial Risk Management - Summary of Carrying Amounts of Group's Notes and Debentures by Currency and Derivatives Which Hedge (Parenthetical) (Detail) - USD ($) $ in Millions | Jun. 30, 2020 | Jun. 30, 2019
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Disclosure of detailed information about hedged items [line items] |  |
Borrowings | $ 23,605 | $ 24,113
Fixed interest rate not swapped to floating rate [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Borrowings | $ 3,019 | $ 3,019

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- Details
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