Financial Instruments (Narrative) (Details) € in Millions, ¥ in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2025 EUR (€)	Jun. 30, 2025 JPY (¥)	Jun. 30, 2024 EUR (€)	Jun. 30, 2024 JPY (¥)
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments			$ 0	$ 0	$ 0
Proceeds from net investment hedge terminations			2	34	$ 29
September 2018
Derivative [Line Items]
Proceeds from net investment hedge terminations	$ 19
March 2022
Derivative [Line Items]
Proceeds from net investment hedge terminations	10
January 2023
Derivative [Line Items]
Proceeds from net investment hedge terminations			28
June 2027 [Member]
Derivative [Line Items]
Proceeds from net investment hedge terminations			6
March 2025 [Member]
Derivative [Line Items]
Proceeds from Hedge, Financing Activities			2
Foreign Currency Contracts
Derivative [Line Items]
Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax			33	(26)
Interest Income (Expense), Nonoperating, Net			9	14
Fair Value Hedging | Interest Rate Swap
Derivative [Line Items]
Derivative, notional amount			1,600
Notional Amount	1,600		1,600	1,600
Cash Flow Hedging | Currency Swap [Member]
Derivative [Line Items]
Notional Amount	334		332	334
Cash Flow Hedging | Foreign Currency Contracts
Derivative [Line Items]
Derivative, notional amount	401		381	401
Notional Amount	579		575	579
Cash Flow Hedging | Foreign Currency Contracts | Forecast | Subsequent Event
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months		$ 5
Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Swap
Derivative [Line Items]
Derivative Liability, Notional Amount	300		500	300
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | September 2018
Derivative [Line Items]
Derivatives, Hedge Discontinuances, Termination of Hedging Instrument, Notional Amount	233			233				€ 200
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | March 2022
Derivative [Line Items]
Derivatives, Hedge Discontinuances, Termination of Hedging Instrument, Notional Amount	400			400					¥ 48,000
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] | June 2027 [Member]
Derivative [Line Items]
Derivatives, Hedge Discontinuances, Termination of Hedging Instrument, Notional Amount			120				18,000
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | September 2025 [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	150			150					19,000
Notional Amount			120				18,000
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | March 2026 [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	107			107				100
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | March 2025 [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	107			107				€ 100
Notional Amount			107			€ 100
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | June 2027 [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	$ 150			$ 150					¥ 19,000
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