Shareholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions			3 Months Ended
	Nov. 03, 2015	Oct. 15, 2015	Oct. 02, 2015	Oct. 03, 2014
Stock Based Compensation [Abstract]
Total compensation cost related to unvested stock options and ESPP rights issued			$ 118,000,000
Weighted average service period			2 years 6 months
Unamortized fair value of all unvested restricted stock unit awards			$ 181,000,000
Weighted average vesting period			2 years 1 month
Compensation cost for cash-settled stock appreciation rights			$ 1,000,000	$ 4,000,000
Tax Benefit From Stock Appreciation Rights Compensation			0	1,000,000
Total liability related to SARs			$ 40,000,000
Assumed Stock Appreciation Rights Outstanding At Balance Sheet Date			0.6
Options outstanding to purchase shares with exercise price below company stock price			4.9
Options outstanding to purchase shares with exercise price below company stock price, intrinsic value			$ 201,000,000
Aggregate intrinsic value of options exercised under the Company's stock option plan			27,000,000	$ 86,000,000
Grant-date fair value of the shares underlying the restricted stock awards			$ 99,000,000
Stock Appreciation Right outstanding, weighted average exercise price			$ 7.89
Stock Repurchase Program Additional Amount Authorized			$ 5,000,000,000
Treasury Stock, Shares, Acquired			0.7
Treasury Stock, Value, Acquired, Cost Method			$ 60,000,000
Remaining Amount For Repurchase Under Share Repurchase Program			$ 2,124,000,000
Subsequent Event [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 23.09
Cash dividend			$ 0.50	$ 0.40
Payments of Dividends			$ 115,000,000	$ 94,000,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash dividend	$ 0.50
Payments of Dividends		$ 116,000,000