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v3.25.3

Acquisitions - Significant Estimates Used by Management in Determining Fair Values of Customer Relationships Acquired (Details) - Customer relationships | 9 Months Ended
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Sep. 30, 2025
Minimum |
Goodwill And Intangible Assets [Line Items] |
Discount rates (in percent) | 13.00%
Customer attrition rates (in percent) | 10.00%
Maximum |
Goodwill And Intangible Assets [Line Items] |
Discount rates (in percent) | 20.00%
Customer attrition rates (in percent) | 30.00%
Weighted Average |
Goodwill And Intangible Assets [Line Items] |
Discount rates (in percent) | 16.00%
Customer attrition rates (in percent) | 12.00%

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- Definition Fair Value Inputs, Customer Attrition Rates + References No definition available. + Details
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Namespace Prefix: | pwr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Fair Value Inputs, Discount Rate + References No definition available. + Details
Name: | pwr_FairValueInputsDiscountRate
Namespace Prefix: | pwr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Goodwill and intangible assets. + References No definition available. + Details
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Namespace Prefix: | pwr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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- Details
Name: | srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |