XML 129 R154.htm IDEA: XBRL DOCUMENT v3.20.2
Financial Risk Management - Summary of Reconciliation of Components of Equity and Analysis of Movements in Reserves for all Hedges (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year $ 40 $ 58
Add: Change in fair value of hedging instrument recognised in OCI (221) (229)
Less: Reclassified from reserves to interest expense - recognised through OCI 208 211
At the end of the financial year 27 40
Cash flow hedging reserve, gross [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year 163 85
Add: Change in fair value of hedging instrument recognised in OCI (315) (327)
Less: Reclassified from reserves to interest expense - recognised through OCI 223 229
At the end of the financial year 71 163
Cash flow hedging reserve, gross [member] | Impact of adopting IFRS 9 [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year   176
Cash flow hedging reserve, tax [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year (49) (27)
Add: Change in fair value of hedging instrument recognised in OCI 94 98
Less: Reclassified from reserves to interest expense - recognised through OCI (66) (68)
At the end of the financial year (21) (49)
Cash flow hedging reserve, tax [member] | Impact of adopting IFRS 9 [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year   (52)
Cash flow hedging reserve, net [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year 114 58
Add: Change in fair value of hedging instrument recognised in OCI (221) (229)
Less: Reclassified from reserves to interest expense - recognised through OCI 157 161
At the end of the financial year 50 114
Cash flow hedging reserve, net [member] | Impact of adopting IFRS 9 [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year   124
Cost of hedging reserve, gross [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year (106)  
Less: Reclassified from reserves to interest expense - recognised through OCI 74 70
At the end of the financial year (32) (106)
Cost of hedging reserve, gross [member] | Impact of adopting IFRS 9 [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year   (176)
Cost of hedging reserve, tax [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year 32  
Less: Reclassified from reserves to interest expense - recognised through OCI (23) (20)
At the end of the financial year 9 32
Cost of hedging reserve, tax [member] | Impact of adopting IFRS 9 [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year   52
Cost of hedging reserve, net [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year (74)  
Less: Reclassified from reserves to interest expense - recognised through OCI 51 50
At the end of the financial year $ (23) (74)
Cost of hedging reserve, net [member] | Impact of adopting IFRS 9 [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year   $ (124)