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Leases - Summary of Amounts Recorded in Income Statement and Cash Flow Statements (Parenthetical) (Detail) - USD ($)
$ in Millions
12 Months Ended
Jul. 01, 2019
Jun. 30, 2020
Disclosure of quantitative information about leases for lessee [abstract]    
Variable lease costs $ 190 $ 438
Short-term lease costs   211
Low-value lease costs   $ 26