Divestitures - Divestiture Charges, net (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 24, 2016	Jun. 26, 2015	Mar. 27, 2015	Jun. 24, 2016	Jun. 26, 2015
Significant Acquisitions and Disposals [Line Items]
Net gain related to a business segment				$ (107)	$ (19)
Selling, General and Administrative Expenses
Significant Acquisitions and Disposals [Line Items]
Pre-tax loss (gain) related to sale of business	$ 38			$ 107	$ 19
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Selling, General and Administrative Expenses
Significant Acquisitions and Disposals [Line Items]
Gain related to reversal of indemnification reserve for previously divested business	$ 14
Business In ROW Integrated Solutions & Services Segment | Selling, General and Administrative Expenses
Significant Acquisitions and Disposals [Line Items]
Net gain related to a business segment		$ 4
Business In ROW Integrated Solutions & Services Segment | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Selling, General and Administrative Expenses
Significant Acquisitions and Disposals [Line Items]
Net gain related to a business segment			$ (22)