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Long-Term Obligations and Other Short-Term Borrowings Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Jun. 30, 2021
Debt Instrument [Line Items] |  |  |
Debt, Long-term and Short-term, Combined Amount | $ 5,700 |  | $ 6,200
Accounts Payable | 23,400 |  | $ 23,700
Notes Payable Repurchased |  | $ 37 |
Loss on Early Extinguishment of Debt | (10) | $ 0 |
2.616% Notes due 2022 |  |  |
Debt Instrument [Line Items] |  |  |
Repayments of Notes Payable | 572 |  |
2.616% Notes |  |  |
Debt Instrument [Line Items] |  |  |
Loss on Early Extinguishment of Debt | 10 |  |
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 |  |  |
Debt Instrument [Line Items] |  |  |
Other Short-term Borrowings | 0 |  |
Short Term Credit Facilities Member | Committed Receivables Sales Facility Program [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 1,000 |  |

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