Notional Amounts of Outstanding Derivative Instruments Measured in U.S. Dollar Equivalents (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Jun. 30, 2018
Designated as Hedging Instruments | Foreign Exchange Contracts | Derivatives Sold
Derivative [Line Items]
Notional amounts	$ 7,937	$ 11,101
Not Designated as Hedging Instruments | Foreign Exchange Contracts | Derivatives Purchased
Derivative [Line Items]
Notional amounts	8,576	9,425
Not Designated as Hedging Instruments | Foreign Exchange Contracts | Derivatives Sold
Derivative [Line Items]
Notional amounts	10,166	13,374
Not Designated as Hedging Instruments | Equity Contracts | Derivatives Purchased
Derivative [Line Items]
Notional amounts	50	49
Not Designated as Hedging Instruments | Equity Contracts | Derivatives Sold
Derivative [Line Items]
Notional amounts	6	5
Not Designated as Hedging Instruments | Other Contracts | Derivatives Purchased
Derivative [Line Items]
Notional amounts	1,330	878
Not Designated as Hedging Instruments | Other Contracts | Derivatives Sold
Derivative [Line Items]
Notional amounts	$ 426	$ 472