Debt Instrument, Consent Payment Amount

No definition available.

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Namespace Prefix:	mtz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Ownership Percentage

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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-Section 50
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+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
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-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

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-Publisher FASB
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+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 210
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Debt - Senior Notes - Narrative (Details) - USD ($)		3 Months Ended
Debt - Senior Notes - Narrative (Details) - USD ($)	Oct. 07, 2022	Dec. 31, 2022	Oct. 26, 2022	Sep. 30, 2022	Dec. 31, 2021
Senior Notes \| Subsequent Event \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Debt instrument, redemption price (percentage)	106.625%
Debt instrument, redemption price, percentage of principal amount redeemed	40.00%
Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 2,250,000,000	$ 2,000,000,000
4.50% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Long-term debt obligations				$ 600,000,000	$ 600,000,000.0
Debt instrument, interest rate (percentage)				4.50%	4.50%
6.625% Senior Notes \| Senior Notes \| Subsequent Event
Debt Instrument [Line Items]
Long-term debt obligations	$ 300,000,000
Debt instrument, interest rate (percentage)	6.625%
Consent payment amount	$ 0.0025
Debt ownership percentage	30.00%
Fees and expenses recognized in debt exchange		$ 2,000,000
6.625% Senior Notes \| Senior Notes \| Subsequent Event \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Debt instrument, redemption price (percentage)	100.00%
6.625% Senior Notes \| Senior Notes \| Subsequent Event \| Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Debt instrument, redemption price (percentage)	103.30%
Debt instrument, term	2 years
6.625% Senior Notes \| Senior Notes \| Subsequent Event \| Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Debt instrument, redemption price (percentage)	100.00%
6.625% Senior Notes \| Senior Notes \| Subsequent Event \| Debt Instrument, Redemption, Period Four
Debt Instrument [Line Items]
Debt instrument, redemption price (percentage)	101.00%
6.625% Senior Exchanged Notes \| Senior Notes \| Subsequent Event
Debt Instrument [Line Items]
Long-term debt obligations			$ 74,900,000