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Description of Business and Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended	3 Months Ended
	Apr. 24, 2015	Apr. 24, 2015	Apr. 25, 2014
Minimum | Software maintenance and Hardware maintenance services
Accounting Policies [Abstract]
Maintenance contractual term	1 year
Minimum | Developed Technology
Accounting Policies [Abstract]
Finite-Lived Intangible Asset, Useful Life	3 years
Minimum | Customer Contracts/Relationships
Accounting Policies [Abstract]
Finite-Lived Intangible Asset, Useful Life	2 years
Minimum | Covenants not to Compete
Accounting Policies [Abstract]
Finite-Lived Intangible Asset, Useful Life	2 years
Minimum | Trademarks and Trade Names
Accounting Policies [Abstract]
Finite-Lived Intangible Asset, Useful Life	2 years
Maximum | Software maintenance and Hardware maintenance services
Accounting Policies [Abstract]
Maintenance contractual term	5 years
Maximum | Developed Technology
Accounting Policies [Abstract]
Finite-Lived Intangible Asset, Useful Life	6 years
Maximum | Customer Contracts/Relationships
Accounting Policies [Abstract]
Finite-Lived Intangible Asset, Useful Life	8 years
Maximum | Covenants not to Compete
Accounting Policies [Abstract]
Finite-Lived Intangible Asset, Useful Life	3 years
Maximum | Trademarks and Trade Names
Accounting Policies [Abstract]
Finite-Lived Intangible Asset, Useful Life	7 years
Amended
Accounting Policies [Abstract]
Debt issuance costs		$ 7.5us-gaap_DebtIssuanceCosts / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = us-gaap_NewAccountingPronouncementMember	$ 5.4us-gaap_DebtIssuanceCosts / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = us-gaap_NewAccountingPronouncementMember

X

- Definition

Typical maintenance contract term.

+ References

No definition available.

+ Details

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- Details

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- Definition

Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
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- Details

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- Details

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X

- Details

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