Acquisitions and Acquisition-Related Items, Contingent Consideration (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								3 Months Ended		3 Months Ended		3 Months Ended
	Jul. 25, 2014	Jul. 26, 2013	Jul. 25, 2014 Recurring Level 3	Apr. 25, 2014 Recurring Level 3	Jul. 25, 2014 Other Long-term Liabilities	Apr. 25, 2014 Other Long-term Liabilities	Jul. 25, 2014 Other Accrued Expenses	Apr. 25, 2014 Other Accrued Expenses	Jul. 25, 2014 Product Development Milestone [Member] Recurring Level 3	Jul. 25, 2014 Product Development Milestone [Member] Recurring Level 3 Discounted Cash Flow	Jul. 25, 2014 Revenue-based Payments Recurring Level 3	Jul. 25, 2014 Revenue-based Payments Recurring Level 3 Discounted Cash Flow	Jul. 25, 2014 Revenue-based Payments Minimum Recurring Level 3	Jul. 25, 2014 Revenue-based Payments Maximum Recurring Level 3	Jul. 25, 2014 Business combinations or purchases of intellectual property prior to April 24, 2009 [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High															$ 198
Fair Value Inputs
Discount rate									5.50%				13.50%	24.00%
Contingent Consideration	87	45	87	68	68	51	19	17		25		62
Probability of payment									75.00%		100.00%
Projected fiscal year of payment									2018				2015	2019
Reconciliation of Beginning and Ending Balances of Contingent Milestone Payments Associated with Acquisitions
Beginning Balance	68	142	87	68	68	51	19	17		25		62
Purchase price contingent consideration	23	0
Contingent milestone payments	(5)	(1)
Change in fair value of contingent consideration	1	(96)
Ending Balance	$ 87	$ 45	$ 87	$ 68	$ 68	$ 51	$ 19	$ 17		$ 25		$ 62