Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended			6 Months Ended
	Jul. 26, 2015	Apr. 26, 2015	Jul. 27, 2014	Jul. 26, 2015	Jul. 27, 2014
Accelerated Share Repurchases [Line Items]
Stock repurchase program, additional authorized amount	$ 1,620
Treasury Stock, Shares, Acquired	14
Payments for repurchase of common stock	$ 400			$ 452	$ 500
Treasury Stock, Value, Acquired, Cost Method	289
Implied value of the ASR forward contract recorded in APIC	111			$ 111
Aggregate number of shares repurchased under stock repurchase program (in shares)				222
Aggregated cost of shares repurchased	3,720			$ 3,720
Stock Repurchase Program, Remaining Authorized Repurchase Amount	1,600			1,600
Dividends, Cash [Abstract]
Payments of Dividends	$ 52			$ 99	$ 94
Cash dividends declared and paid per common share	$ 0.0975	$ 0.085	$ 0.0850	$ 0.1825	$ 0.1700
Authorized number of shares of common stock (in shares)	2,000			2,000
Par value of common stock	$ 0.001			$ 0.001