Basis of Presentation and Summary of Significant Accounting Policies (Narrative, Receivables) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ 662	$ 677	$ 720	$ 832
Finance notes and related accrued interest, net, total	32	43
Finance notes and related accrued interest, net, current	$ 7	14
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivable financing agreement term	1 year
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivable financing agreement term	5 years
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ 213	233	240	207
SEC Schedule, 12-09, Allowance, Loss on Finance Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ 2	$ 3	$ 6	$ 8