Leases - Schedule of total lease cost (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Lessee, Lease, Description [Line Items]
Total lease costs	$ 220	$ 227	$ 246
Selling, general and administrative
Lessee, Lease, Description [Line Items]
Operating lease costs	121	125	135
Variable lease costs	24	24	28
Operating expenses
Lessee, Lease, Description [Line Items]
Operating lease costs	32	36	37
Short term lease costs	16	12	15
Depreciation and amortization
Lessee, Lease, Description [Line Items]
Finance lease costs	25	27	27
Interest expense, net
Lessee, Lease, Description [Line Items]
Finance lease costs	$ 2	$ 3	$ 4