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Commitments and Contingencies - Joint Venture Liabilities (Details) $ in Millions | Dec. 31, 2022 USD ($)
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Commitments and Contingencies Disclosure [Abstract] |
Outstanding capital commitments due in next twelve months | $ 0.6
Outstanding capital commitments due after next twelve months | $ 10.5

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- Definition Equity Method Investments, Outstanding Commitment, To Be Paid, After Year One + References No definition available. + Details
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Namespace Prefix: | pwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Equity Method Investments, Outstanding Commitment, To Be Paid, Year One + References No definition available. + Details
Name: | pwr_EquityMethodInvestmentsOutstandingCommitmentToBePaidYearOne
Namespace Prefix: | pwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration