Derivative Instruments - Effects of Derivatives on AOCI and Statement of Income (Details) - USD ($) $ in Millions	3 Months Ended
Sep. 30, 2025	Sep. 30, 2024
Cash flow hedging
Derivative [Line Items]
Gain / (Loss) Reclassified from AOCI into Income (Effective Portion)	$ (2)	$ 0
Cash flow hedging \| Commodity contracts \| Cost of sales
Derivative [Line Items]
Gain / (Loss) Reclassified from AOCI into Income (Effective Portion)	(1)	1
Cash flow hedging \| Treasury locks \| Interest expense
Derivative [Line Items]
Gain / (Loss) Reclassified from AOCI into Income (Effective Portion)	(1)	(1)
Fair value hedging
Derivative [Line Items]
Gain / (Loss) Recognized in Income for Derivatives in Fair Value Hedging Relationships	7	(7)
Fair value hedging \| Interest rate swaps \| Interest expense
Derivative [Line Items]
Gain / (Loss) Recognized in Income for Derivatives in Fair Value Hedging Relationships	5	25
Fair value hedging \| Cross currency swaps \| Interest expense
Derivative [Line Items]
Gain / (Loss) Recognized in Income for Derivatives in Fair Value Hedging Relationships	4	3
Fair value hedging \| Cross currency swaps \| Other Operating Income (Expense)
Derivative [Line Items]
Gain / (Loss) Recognized in Income for Derivatives in Fair Value Hedging Relationships	(2)	(35)
Not designated as hedging instrument \| Other Nonoperating Income (Expense)
Derivative [Line Items]
Gain / (Loss) Recognized in Income for Derivatives Not Designated as Hedging Instruments	5	(1)
Not designated as hedging instrument \| Forward exchange contracts \| Other Nonoperating Income (Expense)
Derivative [Line Items]
Gain / (Loss) Recognized in Income for Derivatives Not Designated as Hedging Instruments	1	0
Not designated as hedging instrument \| Interest rate swaps \| Other Nonoperating Income (Expense)
Derivative [Line Items]
Gain / (Loss) Recognized in Income for Derivatives Not Designated as Hedging Instruments	0	(1)
Not designated as hedging instrument \| Cross currency swaps \| Other Nonoperating Income (Expense)
Derivative [Line Items]
Gain / (Loss) Recognized in Income for Derivatives Not Designated as Hedging Instruments	$ 4	$ 0

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
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- Definition

Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

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- Definition

Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 182
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-182

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
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