Commitments and Contingencies (Additional Information) (Details) $ in Millions				1 Months Ended	3 Months Ended						9 Months Ended		12 Months Ended	24 Months Ended	27 Months Ended	42 Months Ended
	Mar. 14, 2017 USD ($)	Mar. 03, 2017 USD ($) patent	May 12, 2016 USD ($)	Apr. 28, 2017 USD ($)	Apr. 29, 2017 USD ($)	Jan. 28, 2017 USD ($)	Apr. 30, 2016 USD ($)	Jan. 25, 2014 USD ($)	Jul. 27, 2013	Apr. 28, 2012 USD ($)	Apr. 29, 2017 USD ($)	Apr. 30, 2016 USD ($)	Sep. 04, 2014 patent	Jul. 30, 2016 USD ($)	Oct. 29, 2016 USD ($)	Jan. 28, 2017 USD ($)
Contingency [Line Items]
Purchase commitments					$ 4,720.0						$ 4,720.0			$ 3,896.0
Liability for purchase commitments					179.0						179.0			159.0
Future compensation expense & contingent consideration (up to)					222.0						222.0
Volume of channel partner financing					6,600.0		$ 6,400.0				19,700.0	$ 19,800.0
Balance of the channel partner financing subject to guarantees					900.0						900.0			1,100.0
Financing provided by third parties for leases and loans on which the Company has provided guarantees					10.0		18.0				47.0	57.0
Charge to product cost of sales					3,405.0		3,214.0				10,113.0	10,547.0
Adjustments to product cost of sales											17.0	8.0
Brazilian authority claim of import tax evasion by importer tax portion					255.0						255.0
Brazilian authority claim of import tax evasion by importer interest portion					1,500.0						1,500.0
Brazilian authority claim of import tax evasion by importer penalties portion					1,200.0						$ 1,200.0
SRI International
Contingency [Line Items]
Damages awarded, value			$ 23.7
SRI International | Pending Litigation
Contingency [Line Items]
Number of allegedly infringed patents | patent													2
Damages from Product Defects
Contingency [Line Items]
Charge for expected remediation						$ 125.0
Patent Infringement | Sprint Communications Company, L.P. vs. Time Warner Cable, Inc. | Pending Litigation
Contingency [Line Items]
Number of patents found infringed | patent		5
Damages awarded, value	$ 139.8	$ 139.8
Percentage of post-judgment interest awarded	1.06%
Pre-judgment interest requested				$ 20.3
Maximum
Contingency [Line Items]
Warranty period for products, in years											5 years
Channel partners revolving short-term financing payment term, in days											90 days
End user lease and loan term, in years											3 years
Minimum
Contingency [Line Items]
Warranty period for products, in days											90 days
Channel partners revolving short-term financing payment term, in days											60 days
Insieme Networks Inc
Contingency [Line Items]
Variable interest entities investment										$ 100.0
Ownership percentage as a result of investment									83.00%
Compensation expense related to acquisitions					9.0		$ 35.0				$ 41.0	136.0			$ 824.0
Payments to acquire additional interest in subsidiaries											436.0	$ 375.0				$ 825.0
Insieme Networks Inc | Including compensation that has been expensed through current reporting period | Maximum
Contingency [Line Items]
Maximum potential compensation expense					831.0						831.0
Supplier Component Remediation Liability
Contingency [Line Items]
Charge to product cost of sales								$ 655.0
Loss contingency accrual					$ 206.0						$ 206.0			276.0
Supplier Component Remediation Liability | Cost of Goods, Product Line
Contingency [Line Items]
Adjustments to product cost of sales						$ 141.0								$ 238.0