Organization and Basis of Presentation (Details)	9 Months Ended
Apr. 28, 2018 Subsidiary Country Discipline Project
Organization and Basis of Presentation [Abstract]
Number of wholly owned and majority owned operating subsidiaries \| Subsidiary	8
Number of countries in which the company operates	5
Number of disciplines \| Discipline	80
Number of projects completed by the entity for a wide variety of clients, minimum \| Project	50,000
Minimum number of countries in which the entity completed projects	120

Represents the minimum number of countries in which the entity completed projects.

No definition available.

Name:	eei_NumberOfCountriesInWhichTheEntityCompletedProjectsMinimum
Namespace Prefix:	eei_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The number of scientific, engineering, health and social disciplines the entity's staff represents.

No definition available.

The minimum number of projects the entity has completed for a wide variety of clients.

No definition available.

Name:	eei_NumberOfProjectsCompletedByTheEntityForAWideVarietyOfClientsMinimum
Namespace Prefix:	eei_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Represents the number of wholly owned and majority owned operating subsidiaries in which the Company has direct and indirect ownership.

No definition available.

Name:	eei_NumberOfWhollyOwnedAndMajorityOwnedOperatingSubsidiaries
Namespace Prefix:	eei_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

The number of countries in which the entity operates as of balance sheet date.

No definition available.

Name:	us-gaap_NumberOfCountriesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

No definition available.

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration