Basis of Presentation and Summary of Significant Accounting Policies (Narrative, Receivables) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	$ 779	$ 898	$ 944	$ 729
Finance notes and related accrued interest, net, total	56	63
Finance notes and related accrued interest, net, current	$ 9	12
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]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	$ 299	273	243	207
SEC Schedule, 12-09, Allowance, Loss on Finance Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	$ 6	$ 8	$ 12	$ 27