Long-Term Obligations and Other Short-Term Borrowings Summary of Debt (Details) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016
Debt Instrument [Line Items]
Other obligations	$ 388	$ 330
Total	10,395	5,539
Less: current portion of long-term obligations and other short-term borrowings	1,327	587
Long-term obligations, less current portion	9,068	4,952
1.7% Notes due 2018
Debt Instrument [Line Items]
Notes Payable	400	405
1.9% Notes due 2017
Debt Instrument [Line Items]
Notes Payable	0	251
1.95% Notes due 2018
Debt Instrument [Line Items]
Notes Payable	547	554
1.948% Notes due 2019
Debt Instrument [Line Items]
Notes Payable	996	0
2.4% Notes due 2019
Debt Instrument [Line Items]
Notes Payable	453	461
3.2% Notes due 2022
Debt Instrument [Line Items]
Notes Payable	248	253
Floating Rate Notes due fiscal 2022
Debt Instrument [Line Items]
Notes Payable	347	0
3.2% Notes due 2023
Debt Instrument [Line Items]
Notes Payable	544	549
3.079% Notes due fiscal 2024
Debt Instrument [Line Items]
Notes Payable	744	0
3.5% Notes due fiscal 2025
Debt Instrument [Line Items]
Notes Payable	396	398
3.75% Notes due 2025
Debt Instrument [Line Items]
Notes Payable	481	505
3.41% Notes due fiscal 2027
Debt Instrument [Line Items]
Notes Payable	1,340	0
4.5% Notes due 2044
Debt Instrument [Line Items]
Notes Payable	341	345
4.6% Notes due 2043
Debt Instrument [Line Items]
Notes Payable	346	349
4.625% Notes due 2020
Debt Instrument [Line Items]
Notes Payable	519	528
2.616% Notes due fiscal 2022
Debt Instrument [Line Items]
Notes Payable	1,142	0
4.9% Notes due 2045
Debt Instrument [Line Items]
Notes Payable	445	450
4.368% Notes due fiscal 2047
Debt Instrument [Line Items]
Notes Payable	594	0
7.0% Debentures due 2026
Debt Instrument [Line Items]
Notes Payable	124	124
7.8% Debentures due 2016
Debt Instrument [Line Items]
Notes Payable	$ 0	$ 37