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Financial Instruments (Narrative) (Details) ¥ in Millions, $ in Millions | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2022 JPY (¥) | Dec. 31, 2021 USD ($) | Sep. 30, 2021 USD ($)
Derivative [Line Items] |  |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | $ 0 | $ 0 | $ 0 | $ 0 |  |  |
Proceeds from Hedge, Investing Activities |  |  | 71 | 0 |  |  |
Cash Flow Hedging [Member] |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax | 1 | 13 | 4 | 20 |  |  |
Foreign Exchange Contract [Member] |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax | 22 | (49) | 44 | (3) |  |  |
Interest Income (Expense), Nonoperating, Net | 5 | 5 | 16 | 14 |  |  |
Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Swap |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative Liability, Notional Amount |  |  |  |  |  | $ 200 | $ 100
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivatives, Hedge Discontinuances, Termination of Hedging Instrument, Notional Amount | 600 |  | 600 |  | ¥ 64,000 |  |
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | September 2025 |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative Liability, Notional Amount | 200 |  | 200 |  | 24,000 |  |
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | June 2027 |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative Liability, Notional Amount | 200 |  | $ 200 |  | ¥ 24,000 |  |
Other Nonoperating Income (Expense) [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | $ (4) | $ 1 |  | $ (4) |  |  |

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