Long-Term Obligations and Other Short-Term Borrowings (Summary of Long-Term Obligations and Other Short-Term Borrowings) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Debt Instrument
Other obligations	$ 312	$ 319
Total debt	5,492	3,972
Less: current portion of long-term obligations and other short-term borrowings	281	801
Long-term obligations, less current portion	5,211	3,171
1.7% Notes due 2018
Debt Instrument
Notes payable	$ 404	401
Stated interest rate	1.70%
1.9% Notes due 2017
Debt Instrument
Notes payable	$ 251	251
Stated interest rate	1.90%
1.95% Notes due 2018
Debt Instrument
Notes payable	$ 550	0
Stated interest rate	1.95%
2.4% Notes due 2019
Debt Instrument
Notes payable	$ 450	0
Stated interest rate	2.40%
3.2% Notes due 2022
Debt Instrument
Notes payable	$ 249	248
Stated interest rate	3.20%
3.2% Notes due 2023
Debt Instrument
Notes payable	$ 549	549
Stated interest rate	3.20%
3.5% Notes due 2024
Debt Instrument
Notes payable	$ 398	0
Stated interest rate	3.50%
3.75% Notes due 2025
Debt Instrument
Notes payable	$ 500	0
Stated interest rate	3.75%
4.0% Notes due 2015
Debt Instrument
Notes payable	$ 0	513
Stated interest rate	4.00%
4.5% Notes due 2044
Debt Instrument
Notes payable	$ 345	0
Stated interest rate	4.50%
4.6% Notes due 2043
Debt Instrument
Notes payable	$ 349	349
Stated interest rate	4.60%
4.625% Notes due 2020
Debt Instrument
Notes payable	$ 524	525
Stated interest rate	4.625%
4.9% Notes due 2045
Debt Instrument
Notes payable	$ 450	0
Stated interest rate	4.90%
5.8% Notes due 2016
Debt Instrument
Notes payable	$ 0	301
Stated interest rate	5.80%
5.85% Notes due 2017
Debt Instrument
Notes payable	$ 0	158
Stated interest rate	5.85%
6.0% Notes due 2017
Debt Instrument
Notes payable	$ 0	197
Stated interest rate	6.00%
7.0% Debentures due 2026
Debt Instrument
Notes payable	$ 124	124
Stated interest rate	7.00%
7.8% Debentures due 2016
Debt Instrument
Notes payable	$ 37	$ 37
Stated interest rate	7.80%