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New and Amended Accounting Standards and Interpretations - Summary of Reconciliation of Operating Lease Commitments to Expected Total Lease Liability to be Recognised (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jul. 01, 2019
Jun. 30, 2020
Disclosure of initial application of standards or interpretations [abstract]    
Operating lease commitments as at 30 June 2019 $ 1,905 $ 1,905
Add: Leases which did not meet the definition of a lease under IAS 17 686  
Add: Cost of reasonably certain extension options (undiscounted) 91  
Less: Components excluded from lease liability (undiscounted) (190) $ (438)
Less: Effect of discounting (191)  
Total additional lease liabilities recognised at 1 July 2019 $ 2,301