Long-Term Obligations and Other Short-Term Borrowings Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Line of Credit Facility [Line Items]
Document Fiscal Year Focus		2021
Accounts Payable, Current	$ 23,700	$ 23,700	$ 21,374
Notes Payable Repurchased				$ 100
Other Borrowings	67	67	35
Gain (Loss) on Extinguishment of Debt		(14)	(16)	0
Accounts Payable	23,700	23,700	21,400
Maturities of existing long-term obligations and other short-term borrowings - 2020	872	872
Maturities of existing long-term obligations and other short-term borrowings-2021	584	584
Maturities of existing long-term obligations and other short-term borrowings-2022	808	808
Maturities of existing long-term obligations and other short-term borrowings-2023	418	418
Maturities of existing long-term obligations and other short-term borrowings-2024	525	525
Maturities of existing long-term obligations and other short-term borrowings-Thereafter	3,000	3,000
Letter of Credit
Line of Credit Facility [Line Items]
Long-term Line of Credit	1	1
Committed Receivables Sales Facility Program
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period		200
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	2,000	2,000
Commercial paper
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	2,000	2,000
Short Term Credit Facilities
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			6
2.616% Notes due fiscal 2022
Line of Credit Facility [Line Items]
Notes Payable Repurchased	$ 262	2	247	67
Floating Rate Notes due fiscal 2022
Line of Credit Facility [Line Items]
Notes Payable Repurchased		40	20	8
3.41% Notes due fiscal 2027
Line of Credit Facility [Line Items]
Notes Payable Repurchased			104	24
4.6% Notes due 2043
Line of Credit Facility [Line Items]
Notes Payable Repurchased			6
4.9% Notes due 2045
Line of Credit Facility [Line Items]
Notes Payable Repurchased			5
4.368% Notes due fiscal 2047
Line of Credit Facility [Line Items]
Notes Payable Repurchased			35
2.616% Notes, 3.2% Notes, 3.41% Notes, 4.6% Notes, 4.9% Notes and 4.368% Notes [Member]
Line of Credit Facility [Line Items]
Gain (Loss) on Extinguishment of Debt			9
4.625% Notes due 2020
Line of Credit Facility [Line Items]
Notes Payable Repurchased			500
Gain (Loss) on Extinguishment of Debt			7
3.2% Notes due 2022
Line of Credit Facility [Line Items]
Notes Payable Repurchased		238	11	$ 1
Floating rate notes, 2.616% Notes
Line of Credit Facility [Line Items]
Gain (Loss) on Extinguishment of Debt		1
3.2% notes, 2.616% Notes
Line of Credit Facility [Line Items]
Gain (Loss) on Extinguishment of Debt		$ 13
2.4% Notes due 2019
Line of Credit Facility [Line Items]
Notes Payable Repurchased			$ 450