Basis of Presentation and Summary of Significant Accounting Policies (Narrative, Receivables) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ 677	$ 720	$ 832	$ 877
Finance notes and related accrued interest, net, total	43	56
Finance notes and related accrued interest, net, current	$ 14	9
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	$ 233	240	207	176
SEC Schedule, 12-09, Allowance, Loss on Finance Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ 3	$ 6	$ 8	$ 12