Long-Term Obligations and Other Short-Term Borrowings Summary of Debt (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018
Debt Instrument [Line Items]
Other obligations	$ 10	$ 11
Total	8,031	9,013
Less: current portion of long-term obligations and other short-term borrowings	452	1,001
Long-term obligations, less current portion	7,579	8,012
1.948% Notes due 2019
Debt Instrument [Line Items]
Notes Payable	0	998
2.4% Notes due 2019
Debt Instrument [Line Items]
Notes Payable	450	448
4.625% Notes due 2020
Debt Instrument [Line Items]
Notes Payable	508	514
2.616% Notes due fiscal 2022
Debt Instrument [Line Items]
Notes Payable	1,079	1,143
3.2% Notes due 2022
Debt Instrument [Line Items]
Notes Payable	247	243
Floating Rate Notes due fiscal 2022
Debt Instrument [Line Items]
Notes Payable	340	348
3.2% Notes due 2023
Debt Instrument [Line Items]
Notes Payable	551	525
3.079% Notes due fiscal 2024
Debt Instrument [Line Items]
Notes Payable	781	742
3.5% Notes due fiscal 2025
Debt Instrument [Line Items]
Notes Payable	402	390
3.75% Notes due 2025
Debt Instrument [Line Items]
Notes Payable	494	460
3.41% Notes due fiscal 2027
Debt Instrument [Line Items]
Notes Payable	1,318	1,340
4.6% Notes due 2043
Debt Instrument [Line Items]
Notes Payable	346	346
4.5% Notes due 2044
Debt Instrument [Line Items]
Notes Payable	342	342
4.9% Notes due 2045
Debt Instrument [Line Items]
Notes Payable	445	445
4.368% Notes due fiscal 2047
Debt Instrument [Line Items]
Notes Payable	594	594
7.0% Debentures due 2026
Debt Instrument [Line Items]
Notes Payable	$ 124	$ 124