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Notional Amounts of Outstanding Derivative Instruments Measured in U.S. Dollar Equivalents (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Jun. 30, 2020
Designated as Hedging Instruments | Foreign Exchange Contracts | Derivatives Purchased    
Derivative [Line Items]    
Notional amounts $ 635 $ 635
Designated as Hedging Instruments | Foreign Exchange Contracts | Derivatives Sold    
Derivative [Line Items]    
Notional amounts 6,953 6,754
Designated as Hedging Instruments | Interest Rate Contracts | Derivatives Purchased    
Derivative [Line Items]    
Notional amounts 1,283 1,295
Not Designated as Hedging Instruments | Foreign Exchange Contracts | Derivatives Purchased    
Derivative [Line Items]    
Notional amounts 11,247 11,896
Not Designated as Hedging Instruments | Foreign Exchange Contracts | Derivatives Sold    
Derivative [Line Items]    
Notional amounts 14,598 15,595
Not Designated as Hedging Instruments | Other Contracts | Derivatives Purchased    
Derivative [Line Items]    
Notional amounts 2,350 1,844
Not Designated as Hedging Instruments | Other Contracts | Derivatives Sold    
Derivative [Line Items]    
Notional amounts $ 745 $ 757