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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 |

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