Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020
Deferred income tax assets:
Receivable basis difference	$ 40	$ 39
Accrued liabilities	874	607
Share-based compensation	38	38
Loss and tax credit carryforwards	805	589
Deferred tax assets related to uncertain tax positions	35	52
Other	16	87
Total deferred income tax assets	1,808	1,412
Deferred Tax Assets, Valuation Allowance	(515)	(470)
Deferred Tax Assets, Net	1,293	942
Deferred income tax liabilities:
Inventory basis differences	(1,119)	(1,083)
Property-related	(375)	(327)
Other	(733)	(751)
Deferred Tax Liabilities, Deferred Expense, Reserves and Accruals	(975)	0
Deferred Tax Liabilities, Other	(23)	0
Total deferred income tax liabilities	(3,225)	(2,161)
Net deferred income tax liability	$ (1,932)	$ (1,219)