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Long-Term Obligations and Other Short-Term Borrowings Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2019
Jun. 30, 2019
Debt Disclosure [Abstract]    
Debt and Lease Obligation $ 7,991 $ 8,031
Accounts Payable, Current 19,724 21,535
Notes Payable Repurchased $ 74  
Commercial Paper [Member]    
Debt Instrument [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity   2,000
Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity   2,000
Short Term Credit Facilities Member | Committed Receivables Sales Facility Program [Member]    
Debt Instrument [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity   $ 1,000