XML 56 R44.htm IDEA: XBRL DOCUMENT
v3.25.3

Revenue from Contracts with Customers - Schedule of Revenue. Remaining Performance Obligations, Expected Timing of Satisfaction (Details) $ in Thousands | Sep. 30, 2025 USD ($)
--- | ---
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | $ 12,613,893
UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 12,402,065
United States Electrical Construction And Facilities Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 4,497,521
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 6,421,665
United States Building Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 1,280,681
United States Industrial Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 202,198
United Kingdom Building Services [Member] | UNITED KINGDOM |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | $ 211,828
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 9,835,229
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 9,655,250
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 | United States Electrical Construction And Facilities Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 3,330,996
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 4,952,601
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 | United States Building Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 1,169,455
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 | United States Industrial Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 202,198
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 | United Kingdom Building Services [Member] | UNITED KINGDOM |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 179,979
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 2,778,664
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 2,746,815
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 | United States Electrical Construction And Facilities Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 1,166,525
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 1,469,064
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 | United States Building Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 111,226
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 | United States Industrial Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 | United Kingdom Building Services [Member] | UNITED KINGDOM |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Remaining performance obligations | $ 31,849

X
- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 + Details
Name: | us-gaap_RevenueRemainingPerformanceObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(1) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 + Details
Name: | us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=eme_UnitedStatesElectricalConstructionAndFacilitiesServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=eme_UnitedStatesMechanicalConstructionAndFacilitiesServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=eme_UnitedStatesBuildingServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=eme_UnitedStatesIndustrialServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=eme_UnitedKingdomBuildingServicesMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis=2025-10-01
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis=2026-10-01
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |