Debt and Financing Arrangements (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Floating Rate Notes $1.5 billion face amount, due in 2012	Jun. 30, 2011 4.70% Debentures $1.75 billion face amount, due in 2041	Mar. 31, 2011 4.70% Debentures $1.75 billion face amount, due in 2041	Jun. 30, 2010 4.70% Debentures $1.75 billion face amount, due in 2041	Jun. 30, 2011 0.875% Convertible Senior Notes $1.15 billion face amount, due in 2014	Jun. 30, 2010 0.875% Convertible Senior Notes $1.15 billion face amount, due in 2014	Jun. 30, 2011 5.765% Debentures $1.0 billion face amount, due in 2041	Mar. 30, 2011 5.765% Debentures $1.0 billion face amount, due in 2041	Jun. 30, 2011 4.479% Debentures $750 million face amount, due in 2021	Mar. 30, 2011 4.479% Debentures $750 million face amount, due in 2021	Jun. 30, 2011 5.45% Notes $700 million face amount, due in 2018	Jun. 30, 2010 5.45% Notes $700 million face amount, due in 2018	Jun. 30, 2011 5.375% Debentures $600 million face amount, due in 2035	Jun. 30, 2010 5.375% Debentures $600 million face amount, due in 2035	Jun. 30, 2011 5.935% Debentures $500 million face amount, due in 2032	Jun. 30, 2010 5.935% Debentures $500 million face amount, due in 2032	Jun. 30, 2011 6.625% Debentures $298 million face amount, due in 2029	Jun. 30, 2010 6.625% Debentures $298 million face amount, due in 2029	Jun. 30, 2011 8.375% Debentures $295 million face amount, due in 2017	Jun. 30, 2010 8.375% Debentures $295 million face amount, due in 2017	Jun. 30, 2011 7.5% Debentures $282 million face amount, due in 2027	Jun. 30, 2010 7.5% Debentures $282 million face amount, due in 2027	Jun. 30, 2011 6.95% Debentures $250 million face amount, due in 2097	Jun. 30, 2010 6.95% Debentures $250 million face amount, due in 2097	Jun. 30, 2011 7.0% Debentures $246 million face amount, due in 2031	Jun. 30, 2010 7.0% Debentures $246 million face amount, due in 2031	Jun. 30, 2011 7.125% Debentures $243 million face amount, due in 2013	Jun. 30, 2010 7.125% Debentures $243 million face amount, due in 2013	Jun. 30, 2011 6.45% Debentures $215 million face amount, due in 2038	Jun. 30, 2010 6.45% Debentures $215 million face amount, due in 2038	Jun. 30, 2011 6.75% Debentures $200 million face amount, due in 2027	Jun. 30, 2010 6.75% Debentures $200 million face amount, due in 2027	Jun. 30, 2011 5.87% Debentures $196 million face amount, due in 2010	Jun. 30, 2010 5.87% Debentures $196 million face amount, due in 2010	Jun. 30, 2011 8.125% Debentures $103 million face amount, due in 2012	Jun. 30, 2010 8.125% Debentures $103 million face amount, due in 2012	Jun. 30, 2011 8.875% Debentures $102 million face amount, due in 2011	Jun. 30, 2010 8.875% Debentures $102 million face amount, due in 2011	Jun. 30, 2011 Other.	Jun. 30, 2010 Other.
Debt Instruments.
Total long-term debt including current maturities	$ 8,444	$ 7,174	$ 1,500			$ 1,750	$ 1,026	$ 982	$ 1,008		$ 756		$ 700	$ 700	$ 587	$ 587	$ 495	$ 495	$ 296	$ 296	$ 292	$ 292	$ 281	$ 281	$ 246	$ 246	$ 244	$ 244	$ 243	$ 243	$ 215	$ 215	$ 197	$ 197		$ 191	$ 103	$ 103		$ 102	$ 255	$ 250
Current maturities	(178)	(344)
Total long-term debt	8,266	6,830
Debt face amount	$ 1,750		$ 1,500			$ 1,750	$ 1,150	$ 1,150	$ 1,000		$ 750		$ 700	$ 700	$ 600	$ 600	$ 500	$ 500	$ 298	$ 298	$ 295	$ 295	$ 282	$ 282	$ 250	$ 250	$ 246	$ 246	$ 243	$ 243	$ 215	$ 215	$ 200	$ 200	$ 196	$ 196	$ 103	$ 103	$ 102	$ 102
Interest rate stated percentage (as a percent)			0.42%	4.70%	4.70%		0.875%	0.875%	5.765%	5.765%	4.479%	4.479%	5.45%	5.45%	5.375%	5.375%	5.935%	5.935%	6.625%	6.625%	8.375%	8.375%	7.50%	7.50%	6.95%	6.95%	7.00%	7.00%	7.125%	7.125%	6.45%	6.45%	6.75%	6.75%	5.87%	5.87%	8.125%	8.125%	8.875%	8.875%