Long-Term Obligations and Other Short-Term Borrowings Narrative (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Line of Credit Facility [Line Items]
Document Fiscal Year Focus		2020
Accounts Payable, Current		$ 21,374	$ 21,535
Notes Payable Repurchased			100
Other Borrowings		35	10
Gain (Loss) on Extinguishment of Debt		(16)	0	$ (2)
Maturities of existing long-term obligations and other short-term borrowings - 2020		10
Maturities of existing long-term obligations and other short-term borrowings-2021		1,400
Maturities of existing long-term obligations and other short-term borrowings-2022		585
Maturities of existing long-term obligations and other short-term borrowings-2023		814
Maturities of existing long-term obligations and other short-term borrowings-2024		414
Maturities of existing long-term obligations and other short-term borrowings-Thereafter		3,600
Letter of Credit
Line of Credit Facility [Line Items]
Long-term Line of Credit		1	24
Committed Receivables Sales Facility Program
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period		700
Line of Credit Facility, Average Outstanding Amount		12
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		2,000
Commercial paper
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period		1,700
Line of Credit Facility, Average Outstanding Amount		183
Line of Credit Facility, Maximum Borrowing Capacity		2,000
Short Term Credit Facilities
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		6	9
2.616% Notes due fiscal 2022
Line of Credit Facility [Line Items]
Notes Payable Repurchased		247	67
3.2% Notes due 2023
Line of Credit Facility [Line Items]
Notes Payable Repurchased		11
Floating Rate Notes due fiscal 2022
Line of Credit Facility [Line Items]
Notes Payable Repurchased		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
1.95% Notes due 2018
Line of Credit Facility [Line Items]
Proceeds from (Repayments of) Notes Payable	$ (550)
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