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Financial Instruments (Schedule of Outstanding Instruments, Cash Flow Hedges) (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Fair Value Hedging | Interest Rate Swap      
Derivative [Line Items]      
Notional Amount $ 1,100 $ 800  
Cash Flow Hedging | Foreign Currency Contracts      
Derivative [Line Items]      
Notional Amount 376 327  
Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Swap      
Derivative [Line Items]      
Derivative Liability, Notional Amount $ 300 $ 600 $ 200