Schedule II - Valuations and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Allowance for doubtful accounts	$ 662	$ 677	$ 720	$ 832
SEC Schedule, 12-09, Valuation Allowances and Reserves, Addition, Recovery	1
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense	2,246	2,317	2,382
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account	1	0	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	2,262	2,360	2,494
Pricing Disputes [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense	38	74
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Allowance for doubtful accounts	213	233	240	207
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense	88	108	165
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account	1	0	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	109	115	132
SEC Schedule, 12-09, Allowance, Loss on Finance Receivable [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Allowance for doubtful accounts	2	3	6	8
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense	3	2	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account	0	0	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	4	5	2
Sales Returns and Allowances [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Allowance for doubtful accounts	447	441	474	$ 617
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense	2,155	2,207	2,217
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account	0	0	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	$ 2,149	$ 2,240	2,360
Disputes
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense			$ 109