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Financial Instruments and Fair Value Measurements - Summary of Equity Securities Classified as Level 3 (Detail) - Equity Securities [Member]
$ in Millions
12 Months Ended
Jun. 30, 2019
USD ($)
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance—beginning of year $ 127
Purchases 8
Sales (10)
Measurement adjustments (2)
Foreign exchange and other (10)
Balance—end of year $ 113