Long-Term Obligations and Other Short-Term Borrowings (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021
Debt Instrument [Line Items]
Total Long-Term and Short-Term Obligations	$ 5,600		$ 5,600		$ 6,200
Gain (Loss) on Extinguishment of Debt	0	$ 0	10	$ 1
Accounts Payable	24,800		24,800		$ 23,700
Commercial Paper [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	2,000		2,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	2,000		2,000
Short Term Credit Facilities Member
Debt Instrument [Line Items]
Other Short-term Borrowings	0		0
2.616% Notes due 2022 [Member]
Debt Instrument [Line Items]
Gain (Loss) on Extinguishment of Debt			10
Repayments of Notes Payable			572	2
Committed Receivables Sales Facility Program [Member] | Short Term Credit Facilities Member
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,000		$ 1,000
Floating Rate Notes due 2022 [Member]
Debt Instrument [Line Items]
Repayments of Notes Payable				$ 40