v3.26.1
Financial Instruments (Narrative) (Details)
€ in Millions, ¥ in Millions, $ in Millions
12 Months Ended
Jun. 30, 2027
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2026
EUR (€)
Jun. 30, 2026
JPY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Jun. 30, 2025
EUR (€)
Jun. 30, 2024
JPY (¥)
Derivative [Line Items]                    
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments   $ 0 $ 0 $ 0            
January 2023                    
Derivative [Line Items]                    
Proceeds from/(payments for) net investment hedge terminations       28            
February 2025                    
Derivative [Line Items]                    
Payments for Hedge, Investing Activities   (6)                
March 2023                    
Derivative [Line Items]                    
Proceeds from Hedge, Financing Activities     2              
March 2023 | December 2025                    
Derivative [Line Items]                    
Payments for Hedge, Investing Activities   (3)                
March 2023 | March 2026 [Member]                    
Derivative [Line Items]                    
Payments for Hedge, Investing Activities   (7)                
August 2024                    
Derivative [Line Items]                    
Proceeds from/(payments for) net investment hedge terminations   3   6            
Foreign Currency Contracts                    
Derivative [Line Items]                    
Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax   (34) (33)              
Fair Value Hedging | Interest Rate Swap                    
Derivative [Line Items]                    
Derivative, notional amount   2,200 1,600              
Notional Amount   2,200 1,600              
Cash Flow Hedging | Currency Swap [Member]                    
Derivative [Line Items]                    
Notional Amount   253 332              
Cash Flow Hedging | Foreign Currency Contracts                    
Derivative [Line Items]                    
Derivative, notional amount   418 381              
Notional Amount   591 575              
Cash Flow Hedging | Foreign Currency Contracts | Forecast | Subsequent Event                    
Derivative [Line Items]                    
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months $ 6                  
Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Swap                    
Derivative [Line Items]                    
Derivative Liability, Notional Amount   600   500            
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | January 2023                    
Derivative [Line Items]                    
Derivatives, Hedge Discontinuances, Termination of Hedging Instrument, Notional Amount       300           ¥ 38,000
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | February 2025                    
Derivative [Line Items]                    
Derivatives, Hedge Discontinuances, Termination of Hedging Instrument, Notional Amount   52     € 50          
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | March 2023                    
Derivative [Line Items]                    
Derivatives, Hedge Discontinuances, Termination of Hedging Instrument, Notional Amount     $ 107           € 100  
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | March 2023 | December 2025                    
Derivative [Line Items]                    
Derivatives, Hedge Discontinuances, Termination of Hedging Instrument, Notional Amount             $ 37 € 32    
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | March 2023 | March 2026 [Member]                    
Derivative [Line Items]                    
Derivatives, Hedge Discontinuances, Termination of Hedging Instrument, Notional Amount   73     68          
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | August 2024                    
Derivative [Line Items]                    
Derivatives, Hedge Discontinuances, Termination of Hedging Instrument, Notional Amount   120   $ 120   ¥ 18,000       ¥ 18,000
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | September 2025 [Member]                    
Derivative [Line Items]                    
Notional Amount   120       18,000        
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | June 2027 [Member]                    
Derivative [Line Items]                    
Notional Amount   120       18,000        
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | February 2027                    
Derivative [Line Items]                    
Notional Amount   105     100          
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | March 2028                    
Derivative [Line Items]                    
Notional Amount   80     € 68          
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | September 2027                    
Derivative [Line Items]                    
Notional Amount   $ 120       ¥ 18,000