Notional Amounts of Outstanding Derivative Instruments Measured in U.S. Dollar Equivalents (Detail) - USD ($) $ in Millions	Dec. 31, 2024	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	1,126	1,100
Not Designated as Hedging Instruments | Foreign Exchange Contracts | Derivatives Purchased
Derivative [Line Items]
Notional amounts	7,791	7,167
Not Designated as Hedging Instruments | Foreign Exchange Contracts | Derivatives Sold
Derivative [Line Items]
Notional amounts	30,921	31,793
Not Designated as Hedging Instruments | Equity Contracts | Derivatives Purchased
Derivative [Line Items]
Notional amounts	5,198	4,016
Not Designated as Hedging Instruments | Equity Contracts | Derivatives Sold
Derivative [Line Items]
Notional amounts	2,170	2,165
Not Designated as Hedging Instruments | Other Contracts | Derivatives Purchased
Derivative [Line Items]
Notional amounts	2,636	2,113
Not Designated as Hedging Instruments | Other Contracts | Derivatives Sold
Derivative [Line Items]
Notional amounts	$ 1,162	$ 811