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DERIVATIVE FINANCIAL INSTRUMENTS - Cash Flow Hedges, Fair Value Hedges, Credit Risk Narrative (Details)
3 Months Ended
Sep. 30, 2025
USD ($)
agency
Jun. 30, 2025
USD ($)
Derivatives Not Designated as Hedging Instruments:    
Derivative instruments    
Notional amount $ 3,314,000,000  
Derivative    
Derivative instruments    
Minimum number of nationally recognized rating agencies | agency 2  
Maximum exposure to credit risk in the event of non performance by counterparties, gross fair value of contracts in asset positions $ 74,000,000  
Cross-currency swap contracts    
Derivative instruments    
Fair value hedge, gain to be reclassified within 12 months 14,000,000  
Accumulated net gain (loss) on derivative instruments in AOCI, before tax 10,000,000 $ 7,000,000
Cash flow hedges    
Derivative instruments    
Accumulated net gain (loss) on derivative instruments in AOCI, before tax 3,000,000 $ (13,000,000)
Amount of expected loss to be reclassified from AOCI into earnings, net of tax, within the next twelve months 24,000,000  
Cash flow hedges | Foreign currency forward contracts    
Derivative instruments    
Notional amount 1,270,000,000  
Derivatives in fair value hedging relationships | Interest rate swap contracts | 2.600% Senior Notes, due April 15, 2030 ("2030 Senior Notes")    
Derivative instruments    
Notional amount 700,000,000  
Derivatives in fair value hedging relationships | Interest rate swap contracts | 1.950% Senior Notes, due March15, 2031 ("2031 Senior Notes")    
Derivative instruments    
Notional amount 300,000,000  
Derivatives in fair value hedging relationships | Interest rate swap contracts | 5.000% Senior Notes due February 14, 2034    
Derivative instruments    
Notional amount 300,000,000  
Derivatives in fair value hedging relationships | Cross-currency swap contracts    
Derivative instruments    
Notional amount 491,000,000  
Net investment hedges | Foreign Exchange Forward And Cross-Currency Swap    
Derivative instruments    
Notional amount $ 1,077,000,000