Notional Amounts of Outstanding Derivative Instruments Measured in U.S. Dollar Equivalents (Detail) - USD ($) $ in Millions	Jun. 30, 2025	Jun. 30, 2024
Designated as Hedging Instruments \| Foreign Exchange Contracts \| Derivatives Purchased
Derivative [Line Items]
Notional amounts	$ 1,492	$ 1,492
Designated as Hedging Instruments \| Interest Rate Contracts \| Derivatives Purchased
Derivative [Line Items]
Notional amounts	1,150	1,100
Not Designated as Hedging Instruments \| Foreign Exchange Contracts \| Derivatives Purchased
Derivative [Line Items]
Notional amounts	15,214	7,167
Not Designated as Hedging Instruments \| Foreign Exchange Contracts \| Derivatives Sold
Derivative [Line Items]
Notional amounts	43,307	31,793
Not Designated as Hedging Instruments \| Equity Contracts \| Derivatives Purchased
Derivative [Line Items]
Notional amounts	5,434	4,016
Not Designated as Hedging Instruments \| Equity Contracts \| Derivatives Sold
Derivative [Line Items]
Notional amounts	2,189	2,165
Not Designated as Hedging Instruments \| Other Contracts \| Derivatives Purchased
Derivative [Line Items]
Notional amounts	2,769	2,113
Not Designated as Hedging Instruments \| Other Contracts \| Derivatives Sold
Derivative [Line Items]
Notional amounts	$ 1,242	$ 811