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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 |  |

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