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Long-Term Obligations and Other Short-Term Borrowings Long-Term Debt (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jul. 31, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Debt Instrument [Line Items] |  |  |  |
Accounts payable | $ 19,677 |  | $ 19,677 | $ 17,906
1.7% Notes due 2018 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate |  |  |  | 1.70%
Proceeds from (Repayments of) Notes Payable |  | $ (400) |  |
Offer as percentage of principal amount |  |  | 101.00% |
1.948% Notes due 2019 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate |  |  |  | 1.948%
2.616% Notes due fiscal 2022 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate |  |  |  | 2.616%
3.079% Notes due fiscal 2024 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate |  |  |  | 3.079%
3.41% Notes due fiscal 2027 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate |  |  |  | 3.41%
4.368% Notes due fiscal 2047 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate |  |  |  | 4.368%
1.95% Notes due 2018 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Proceeds from (Repayments of) Notes Payable | $ (550) |  |  |
7.0% Debentures due 2026 | Allegiance Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 7.00% |  | 7.00% |
Medtronic |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Proceeds from Notes Payable, Net |  |  |  | $ 5,200

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