Stockholders' Equity (Details) (USD $)	3 Months Ended
	Apr. 27, 2014	Apr. 28, 2013	Jan. 26, 2014
Accelerated Share Repurchases [Line Items]
Cost of shares repurchased under stock repurchase program	$ 2,950,000,000
Aggregate maximum amount of common stock to be repurchased	3,700,000,000
Stock repurchase program, additional authorized amount	1,000,000,000
Treasury Stock, Shares, Acquired	20,600,000
Treasury Stock Acquired, Average Cost Per Share	$ 368,600,000
Implied value of the ASR forward contract recorded in APIC	131,400,000
Aggregate number of shares repurchased under stock repurchase program (in shares)	181,800,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	750,000,000
Intended return to shareholder in FY2015			1,000,000,000
stock repurchase prepayment	500,000,000
Payments of Dividends	46,731,000	46,267,000
Dividend per share, cash	0.085	0.075
Cash dividend per share - annual	$ 0.34
Authorized number of shares of common stock (in shares)	2,000,000,000
Par value of common stock	$ 0.001