Business Combinations (Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 26, 2014	Nov. 10, 2011
Minimum [Member]
Business Acquisition [Line Items]
Useful Life	1 year
Maximum [Member]
Business Acquisition [Line Items]
Useful Life	15 years
Varian Semiconductor Equipment Associates Inc [Member]
Business Acquisition [Line Items]
Purchased Intangible Assets		$ 1,365
Varian Semiconductor Equipment Associates Inc [Member] | Developed technology [Member]
Business Acquisition [Line Items]
Purchased Intangible Assets		987
Varian Semiconductor Equipment Associates Inc [Member] | Developed technology [Member] | Minimum [Member]
Business Acquisition [Line Items]
Useful Life	1 year
Varian Semiconductor Equipment Associates Inc [Member] | Developed technology [Member] | Maximum [Member]
Business Acquisition [Line Items]
Useful Life	7 years
Varian Semiconductor Equipment Associates Inc [Member] | Customer relationships [Member]
Business Acquisition [Line Items]
Useful Life	15 years
Purchased Intangible Assets		150
Varian Semiconductor Equipment Associates Inc [Member] | In-process technology [Member]
Business Acquisition [Line Items]
Purchased Intangible Assets		142
Varian Semiconductor Equipment Associates Inc [Member] | Patents and trademarks [Member]
Business Acquisition [Line Items]
Useful Life	10 years
Purchased Intangible Assets		69
Varian Semiconductor Equipment Associates Inc [Member] | Backlog [Member]
Business Acquisition [Line Items]
Useful Life	1 year
Purchased Intangible Assets		7
Varian Semiconductor Equipment Associates Inc [Member] | Covenant not to compete [Member]
Business Acquisition [Line Items]
Useful Life	2 years
Purchased Intangible Assets		$ 10