Retirement Benefits - Schedule of Estimated Benefit Payments are Expected to be Paid (Details) $ in Millions	Jun. 30, 2026 USD ($)
Other Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated future benefit payments in the year ending June 30, 2027	$ 5
Estimated future benefit payments in the year ending June 30, 2028	5
Estimated future benefit payments in the year ending June 30, 2029	5
Estimated future benefit payments in the year ending June 30, 2030	5
Estimated future benefit payments in the year ending June 30, 2031	5
Estimated future benefit payments in the aggregate for the five years ending June 30, 2031 through June 30, 2035	20
United States \| Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated future benefit payments in the year ending June 30, 2027	270
Estimated future benefit payments in the year ending June 30, 2028	274
Estimated future benefit payments in the year ending June 30, 2029	282
Estimated future benefit payments in the year ending June 30, 2030	295
Estimated future benefit payments in the year ending June 30, 2031	274
Estimated future benefit payments in the aggregate for the five years ending June 30, 2031 through June 30, 2035	1,334
Non-U.S. Pension Benefits \| Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated future benefit payments in the year ending June 30, 2027	100
Estimated future benefit payments in the year ending June 30, 2028	106
Estimated future benefit payments in the year ending June 30, 2029	108
Estimated future benefit payments in the year ending June 30, 2030	114
Estimated future benefit payments in the year ending June 30, 2031	117
Estimated future benefit payments in the aggregate for the five years ending June 30, 2031 through June 30, 2035	$ 597

Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

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