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Financial Instruments Narrative (Details)
¥ in Millions, $ in Millions
3 Months Ended
Sep. 30, 2025
USD ($)
Sep. 30, 2025
JPY (¥)
Sep. 30, 2024
USD ($)
Derivative [Line Items]      
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments $ 0    
September 2023      
Derivative [Line Items]      
Proceeds from net investment hedge terminations 3    
Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Swap      
Derivative [Line Items]      
Notional Amount     $ 300
Designated as Hedging Instrument | Net Investment Hedging | Currency Swap [Member] | September 2023      
Derivative [Line Items]      
Derivatives, Hedge Discontinuances, Termination of Hedging Instrument, Notional Amount 120 ¥ 18,000  
Designated as Hedging Instrument | Net Investment Hedging | Currency Swap [Member] | September 2027      
Derivative [Line Items]      
Derivative, Notional Amount $ 120 ¥ 18,000