Notional Amounts of Outstanding Derivative Instruments Measured in U.S. Dollar Equivalents (Detail) - USD ($) $ in Millions	Mar. 31, 2026	Jun. 30, 2025
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	1,180	1,150
Not Designated as Hedging Instruments \| Foreign Exchange Contracts \| Derivatives Purchased
Derivative [Line Items]
Notional amounts	14,050	15,214
Not Designated as Hedging Instruments \| Foreign Exchange Contracts \| Derivatives Sold
Derivative [Line Items]
Notional amounts	40,593	43,307
Not Designated as Hedging Instruments \| Equity Contracts \| Derivatives Purchased
Derivative [Line Items]
Notional amounts	5,192	5,434
Not Designated as Hedging Instruments \| Equity Contracts \| Derivatives Sold
Derivative [Line Items]
Notional amounts	2,546	2,189
Not Designated as Hedging Instruments \| Other Contracts \| Derivatives Purchased
Derivative [Line Items]
Notional amounts	2,872	2,769
Not Designated as Hedging Instruments \| Other Contracts \| Derivatives Sold
Derivative [Line Items]
Notional amounts	$ 864	$ 1,242