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Financial Instruments and Fair Value Measurements - Summary of Equity Securities Classified as Level 3 (Detail) - Equity securities - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance—beginning of year $ 113 $ 127
Purchases 19 8
Sales 0 (10)
Measurement adjustments (4) (2)
Foreign exchange and other (5) (10)
Balance—end of year $ 123 $ 113