Number of joint ventures in which the Company has an interest.

No definition available.

Name:	mtz_NumberOfJointVentures
Namespace Prefix:	mtz_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage interest in a proportionately consolidated joint venture.

+ References

No definition available.

+ Details

Name:	mtz_ProportionatelyConsolidatedJointVentureOwnershipPercentage
Namespace Prefix:	mtz_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

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

- Definition

The cash outflow from advancing money to an affiliate (an entity that is related but not strictly controlled by the entity).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsForAdvanceToAffiliate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_CorporateJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=mtz_JointVenturesThatProvideElectricalTransmissionInfrastructureServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=mtz_JointVentureCivilConstructionProjectMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contingencies - Investment Arrangements (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) constructionProject	Dec. 31, 2021 USD ($)
Other Commitments [Line Items]
Number of joint ventures \| constructionProject	4
Proportionately Consolidated Non-Controlled Joint Venture
Other Commitments [Line Items]
Payments for advance to affiliate \| $	$ 0	$ 700,000
Proportionately Consolidated Non-Controlled Joint Venture \| Joint Ventures That Provide Electrical Transmission Infrastructure Services \| Minimum
Other Commitments [Line Items]
Proportionately consolidated non-controlled joint venture, ownership percentage	85.00%
Proportionately Consolidated Non-Controlled Joint Venture \| Joint Ventures That Provide Electrical Transmission Infrastructure Services \| Maximum
Other Commitments [Line Items]
Proportionately consolidated non-controlled joint venture, ownership percentage	90.00%
Proportionately Consolidated Non-Controlled Joint Venture \| Joint Venture Civil Construction Project \| Minimum
Other Commitments [Line Items]
Proportionately consolidated non-controlled joint venture, ownership percentage	25.00%
Proportionately Consolidated Non-Controlled Joint Venture \| Joint Venture Civil Construction Project \| Maximum
Other Commitments [Line Items]
Proportionately consolidated non-controlled joint venture, ownership percentage	50.00%