Deferred Tax Asset, Valuation Allowance, Released

No definition available.

Name:	pwr_DeferredTaxAssetValuationAllowanceReleased
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Income Tax Examination, Penalties And Interest Expense (Income)

+ References

No definition available.

+ Details

Name:	pwr_IncomeTaxExaminationPenaltiesAndInterestExpenseIncome
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Income Tax Expense (Benefit), Continuing Operations, Adjustment Related to Foreign Net Operating Loss Carryforwards

+ References

No definition available.

+ Details

Name:	pwr_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentRelatedToForeignNetOperatingLossCarryforwards
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Income taxes.

+ References

No definition available.

+ Details

Name:	pwr_IncomeTaxesLineItems
Namespace Prefix:	pwr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Other comprehensive income other tax.

+ References

No definition available.

+ Details

Name:	pwr_OtherComprehensiveIncomeLossOtherTax
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-6

+ Details

Name:	us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

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

- Definition

Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-9

+ Details

Name:	us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of realized gain (loss) on investment in marketable security.

+ References

No definition available.

+ Details

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

- Definition

The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

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

- Definition

Amount of tax expense (benefit), after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 10A
-Subparagraph (a)
-SubTopic 10
-Topic 220
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 12
-SubTopic 10
-Topic 220
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-12

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481956/830-20-45-5

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 21
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481694/830-30-45-21

+ Details

Name:	us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of unrealized gain (loss) on investment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

+ Details

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

- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 217
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-217

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-15A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 10B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482525/740-10-45-10B

+ Details

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

- Definition

Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

+ References

+ Details

Name:	us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

+ Details

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

- Definition

Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15A
-Subparagraph (a)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-15A

+ Details

Name:	us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

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

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=pwr_StarryGroupHoldingsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowanceByDeferredTaxAssetAxis=pwr_DeferredTaxAssetsNoLongerAvailableAndCurrencyTranslationAdjustmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowanceByDeferredTaxAssetAxis=pwr_ForeignNetOperatingLossesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowanceByDeferredTaxAssetAxis=pwr_ForeignCurrencyTranslationAdjustmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowanceByDeferredTaxAssetAxis=pwr_RationalizationAndRestructuringEffortsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeTaxAuthorityAxis=pwr_GrossAmountBeforeBalanceSheetPresentationNettingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	pwr_TaxExpirationPeriodAxis=pwr_TaxExpirationYear2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	pwr_TaxExpirationPeriodAxis=pwr_TaxExpirationYear2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	pwr_TaxExpirationPeriodAxis=pwr_TaxExpirationYear2027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	pwr_TaxExpirationPeriodAxis=pwr_TaxExpirationYear2028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	pwr_TaxExpirationPeriodAxis=pwr_TaxExpirationYear2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	pwr_TaxExpirationPeriodAxis=pwr_TaxExpirationYearAfter2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeTaxAuthorityAxis=us-gaap_ForeignCountryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
Income Taxes - Narrative (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes [Line Items]
Other comprehensive income (loss) other, tax		$ 400,000	$ (200,000)
Foreign currency translation adjustment, tax	$ 0	0	0
Valuation allowance for deferred income tax assets	42,576,000	40,013,000	58,500,000
Change in total valuation allowance, increase (decrease)	2,600,000	(18,500,000)	17,200,000
Change in total valuation allowance, increase (decrease)	4,900,000	(20,200,000)	23,300,000
Change in expense related to foreign NOLs		(2,900,000)
Marketable security, realized gain (loss)		(91,500,000)
Tax effect of federal, state and foreign net operating loss carryforwards	179,276,000	62,523,000
Valuation allowance foreign and state net operating loss carryforwards	36,100,000
Total amount of unrecognized tax benefits relating to uncertain tax positions	74,118,000	45,136,000	41,639,000	$ 37,737,000
Additions based on tax positions related to the current year	19,155,000	10,304,000	11,699,000
Reduction related to settlement of audits	0	0	2,207,000
Reduction due to expiration of certain federal and state statutes of limitations	5,558,000	6,807,000	5,413,000
Interest and penalties expense (income) in the provision for income taxes	1,700,000	500,000	500,000
Starry Group Holdings, Inc.
Income Taxes [Line Items]
Change in total valuation allowance, increase (decrease)			22,700,000
Change in total valuation allowance, increase (decrease)		(22,700,000)
Deferred tax asset, valuation allowance, released		22,700,000
Unrealized gain (loss) on investments			(91,500,000)
Deferred Tax Assets No Longer Available And Currency Translation Adjustments
Income Taxes [Line Items]
Change in total valuation allowance, increase (decrease)			$ (4,800,000)
Foreign Net Operating Losses
Income Taxes [Line Items]
Change in total valuation allowance, increase (decrease)		5,600,000
Foreign Currency Translation Adjustments
Income Taxes [Line Items]
Change in total valuation allowance, increase (decrease)	(2,300,000)	$ 1,700,000
Rationalization and Restructuring Efforts
Income Taxes [Line Items]
Change in total valuation allowance, increase (decrease)	(4,600,000)
Gross Amount Before Balance Sheet Presentation Netting
Income Taxes [Line Items]
Tax effect of federal, state and foreign net operating loss carryforwards	185,200,000
Gross Amount Before Balance Sheet Presentation Netting \| 2025
Income Taxes [Line Items]
Tax effect of federal, state and foreign net operating loss carryforwards	5,300,000
Gross Amount Before Balance Sheet Presentation Netting \| 2026
Income Taxes [Line Items]
Tax effect of federal, state and foreign net operating loss carryforwards	900,000
Gross Amount Before Balance Sheet Presentation Netting \| 2027
Income Taxes [Line Items]
Tax effect of federal, state and foreign net operating loss carryforwards	1,100,000
Gross Amount Before Balance Sheet Presentation Netting \| 2028
Income Taxes [Line Items]
Tax effect of federal, state and foreign net operating loss carryforwards	1,000,000.0
Gross Amount Before Balance Sheet Presentation Netting \| 2029
Income Taxes [Line Items]
Tax effect of federal, state and foreign net operating loss carryforwards	900,000
Gross Amount Before Balance Sheet Presentation Netting \| After 2029
Income Taxes [Line Items]
Tax effect of federal, state and foreign net operating loss carryforwards	176,000,000.0
Foreign tax jurisdiction
Income Taxes [Line Items]
Change in total valuation allowance, increase (decrease)	$ 9,500,000