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Financial Risk Management - Summary of Carrying Amounts of Group's Notes and Debentures by Currency and Derivatives Which Hedge (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of notes and debentures | $ 14,932 | $ 11,819
Recognised in cash flow hedging reserve | (40) | (15)
Recognised in cost of hedging reserve | 10 | 1
Recognised in the income statement | (117) | (86)
Accrued and other cash flows | (350) | (74)
Total derivatives fair value | 1,395 | 1,572
Hedged value of notes and debentures | 16,824 | 13,565
Currency risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Risk | 888 | 956
Interest rate risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Risk | 1,004 | 790
USD [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of notes and debentures | 10,928 | 7,245
Recognised in the income statement | 2 | 32
Accrued and other cash flows | (48) | 23
Total derivatives fair value | 452 | 269
Hedged value of notes and debentures | 11,426 | 7,459
USD [member] | Interest rate risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Risk | 498 | 214
GBP [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of notes and debentures | 1,595 | 1,566
Recognised in cash flow hedging reserve | (13) | 24
Recognised in cost of hedging reserve | 3 | (9)
Recognised in the income statement | (69) | (69)
Accrued and other cash flows | (16) | 35
Total derivatives fair value | 673 | 777
Hedged value of notes and debentures | 2,363 | 2,362
GBP [member] | Currency risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Risk | 521 | 522
GBP [member] | Interest rate risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Risk | 247 | 274
EUR [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of notes and debentures | 2,409 | 3,008
Recognised in cash flow hedging reserve | (27) | (39)
Recognised in cost of hedging reserve | 7 | 10
Recognised in the income statement | (50) | (49)
Accrued and other cash flows | (286) | (132)
Total derivatives fair value | 270 | 526
Hedged value of notes and debentures | 3,035 | 3,744
EUR [member] | Currency risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Risk | 367 | 434
EUR [member] | Interest rate risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Risk | $ 259 | $ 302

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