Financial Instruments (Narrative) (Details) € in Millions, ¥ in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2020 JPY (¥)	Sep. 30, 2019 USD ($)	Sep. 30, 2019 EUR (€)	Jun. 30, 2019 USD ($)
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	$ 0	$ 0
Interest Rate Swaps
Derivative [Line Items]
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge	18
Currency Swap [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount		600	¥ 64,000	$ 233	€ 200
Foreign Currency Contracts
Derivative [Line Items]
Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax	7	35
Interest Income (Expense), Nonoperating, Net	19	17
Cash Flow Hedging
Derivative [Line Items]
Derivative Liability, Notional Amount		200
Derivates, Hedge Discontinuances, Hedging Instrument Terminated, Amount	200
Fair Value Hedging | Interest Rate Swaps
Derivative [Line Items]
Derivative, notional amount	200	550
Cash Flow Hedging | Foreign Currency Contracts
Derivative [Line Items]
Derivative, notional amount	436	328
Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Swaps
Derivative [Line Items]
Derivative Liability, Notional Amount	200
Derivatives, matured notional amounts		200
Derivates, Hedge Discontinuances, Hedging Instrument Terminated, Amount	$ 550
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge		$ 112
Derivatives, terminated notional amounts						$ 163