Notional Amounts of Outstanding Derivative Instruments Measured in U.S. Dollar Equivalents (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Jun. 30, 2023
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	1,084	1,078
Not Designated as Hedging Instruments | Foreign Exchange Contracts | Derivatives Purchased
Derivative [Line Items]
Notional amounts	6,957	7,874
Not Designated as Hedging Instruments | Foreign Exchange Contracts | Derivatives Sold
Derivative [Line Items]
Notional amounts	17,026	25,159
Not Designated as Hedging Instruments | Equity Contracts | Derivatives Purchased
Derivative [Line Items]
Notional amounts	3,548	3,867
Not Designated as Hedging Instruments | Equity Contracts | Derivatives Sold
Derivative [Line Items]
Notional amounts	2,154	2,154
Not Designated as Hedging Instruments | Other Contracts | Derivatives Purchased
Derivative [Line Items]
Notional amounts	1,698	1,224
Not Designated as Hedging Instruments | Other Contracts | Derivatives Sold
Derivative [Line Items]
Notional amounts	$ 678	$ 581