Acquisitions and Sales of Other Assets (Purchase Price Allocation) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Jul. 02, 2012
Significant Acquisitions and Disposals [Line Items]
Current assets	$ 3,204
Property, plant and equipment	23,141
Goodwill	12,469
Other long-term assets, excluding goodwill	9,990
Total assets	48,804
Current liabilities, including current maturities of long-term debt	3,593
Long-term liabilities, preferred stock and noncontrolling interests	10,394
Long-term debt	16,746
Total liabilities and preferred stock	30,733
Total estimated purchase price	$ 18,071	$ 18,071