Notional Amounts of Outstanding Derivative Instruments Measured in U.S. Dollar Equivalents (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018
Designated as Hedging Instruments \| Foreign Exchange Contracts \| Derivatives Sold
Derivative [Line Items]
Notional amounts	$ 6,034	$ 11,101
Not Designated as Hedging Instruments \| Foreign Exchange Contracts \| Derivatives Purchased
Derivative [Line Items]
Notional amounts	14,889	9,425
Not Designated as Hedging Instruments \| Foreign Exchange Contracts \| Derivatives Sold
Derivative [Line Items]
Notional amounts	15,614	13,374
Not Designated as Hedging Instruments \| Equity Contracts \| Derivatives Purchased
Derivative [Line Items]
Notional amounts	680	49
Not Designated as Hedging Instruments \| Equity Contracts \| Derivatives Sold
Derivative [Line Items]
Notional amounts	5	5
Not Designated as Hedging Instruments \| Other Contracts \| Derivatives Purchased
Derivative [Line Items]
Notional amounts	1,327	878
Not Designated as Hedging Instruments \| Other Contracts \| Derivatives Sold
Derivative [Line Items]
Notional amounts	$ 451	$ 472