$PWR
QUANTA SERVICES, INC. Stock $pwr

$pwr Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000105091521000009 Filed on March 01, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2018 Q4
Revenue	$2.912B	$3.113B	$3.112B
YoY Change	-6.44%	0.02%	25.56%
Cost Of Revenue	$2.446B	$2.670B	$2.693B
YoY Change	-8.36%	-0.85%	24.9%
Gross Profit	$465.9M	$443.3M	$419.7M
YoY Change	5.09%	5.62%	29.99%
Gross Profit Margin	16.0%	14.24%	13.49%
Selling, General & Admin	$280.0M	$255.1M	$212.0M
YoY Change	9.76%	20.33%	2.76%
% of Gross Profit	60.1%	57.54%	50.51%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$81.40M	$78.10M	$64.70M
YoY Change	4.23%	20.71%	11.17%
% of Gross Profit	17.47%	17.62%	15.42%
Operating Expenses	$301.3M	$276.6M	$224.4M
YoY Change	8.93%	23.26%	3.74%
Operating Profit	$164.6M	$166.7M	$195.3M
YoY Change	-1.27%	-14.64%	83.26%
Interest Expense	-$4.900M	-$18.70M	-$11.30M
YoY Change	-73.8%	65.49%	73.85%
% of Operating Profit	-2.98%	-11.22%	-5.79%
Other Income/Expense, Net	$6.100M	$11.80M	-$5.700M
YoY Change	-48.31%	-307.02%	-242.5%
Pretax Income	$171.7M	$145.9M	$128.8M
YoY Change	17.68%	13.28%	180.61%
Income Tax	-$200.0K	$25.60M	$77.30M
% Of Pretax Income	-0.12%	17.55%	60.02%
Net Earnings	$170.1M	$120.3M	$57.79M
YoY Change	41.4%	108.16%	-50.0%
Net Earnings / Revenue	5.84%	3.86%	1.86%
Basic Earnings Per Share
Diluted Earnings Per Share	$1.165M	$793.1K	$375.4K
COMMON SHARES
Basic Shares Outstanding	138.9M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2020 Q4	2019 Q4	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$184.6M	$164.8M	$78.70M
YoY Change	12.01%	109.4%	-43.09%
Cash & Equivalents	$184.6M	$164.8M	$78.69M
Short-Term Investments
Other Short-Term Assets	$183.4M	$261.3M	$208.1M
YoY Change	-29.81%	25.56%	23.57%
Inventory	$50.47M	$55.72M	$107.7M
Prepaid Expenses
Receivables	$2.716B	$2.748B	$2.355B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$3.588B	$3.831B	$3.326B
YoY Change	-6.33%	15.18%	15.9%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.818B	$1.671B	$1.276B
YoY Change	8.77%	30.95%	-0.98%
Goodwill	$2.121B	$2.023B	$1.900B
YoY Change	4.86%	6.46%	1.67%
Intangibles	$435.7M	$413.7M	$280.2M
YoY Change	5.3%	47.67%	6.46%
Long-Term Investments	$44.90M
YoY Change
Other Assets	$435.7M	$393.3M	$293.6M
YoY Change	10.79%	33.95%	54.63%
Total Long-Term Assets	$4.810B	$4.501B	$3.750B
YoY Change	6.87%	20.03%	3.86%
TOTAL ASSETS
Total Short-Term Assets	$3.588B	$3.831B	$3.326B
Total Long-Term Assets	$4.810B	$4.501B	$3.750B
Total Assets	$8.398B	$8.332B	$7.076B
YoY Change	0.8%	17.75%	9.19%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.510B	$1.490B	$1.315B
YoY Change	1.36%	13.32%	24.3%
Accrued Expenses	$85.10M	$92.50M
YoY Change	-8.0%
Deferred Revenue	$528.9M	$606.1M	$426.0M
YoY Change	-12.75%	42.3%	-1.71%
Short-Term Debt	$4.233M	$6.542M	$33.42M
YoY Change	-35.3%	-80.43%
Long-Term Debt Due	$10.53M	$68.33M	$32.22M
YoY Change	-84.59%	112.04%	2541.31%
Total Short-Term Liabilities	$2.139B	$2.263B	$1.806B
YoY Change	-5.5%	25.3%	21.05%
LONG-TERM LIABILITIES
Long-Term Debt	$1.174B	$1.292B	$1.041B
YoY Change	-9.12%	24.19%	55.14%
Other Long-Term Liabilities	$391.2M	$311.3M	$404.6M
YoY Change	25.67%	-23.05%	18.17%
Total Long-Term Liabilities	$391.2M	$311.3M	$1.445B
YoY Change	25.67%	-78.46%	42.64%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.139B	$2.263B	$1.806B
Total Long-Term Liabilities	$391.2M	$311.3M	$1.445B
Total Liabilities	$4.049B	$4.278B	$3.470B
YoY Change	-5.34%	23.27%	29.27%
SHAREHOLDERS EQUITY
Retained Earnings	$3.265B	$2.854B	$2.477B
YoY Change	14.39%	15.22%	13.06%
Common Stock	$2.170B	$2.025B	$1.967B
YoY Change	7.18%	2.91%	4.13%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$857.8M	$586.8M	$554.4M
YoY Change	46.19%	5.83%	548.84%
Treasury Stock Shares	24.41M shares	17.09M shares	16.23M shares
Shareholders Equity	$4.344B	$4.050B	$3.604B
YoY Change
Total Liabilities & Shareholders Equity	$8.398B	$8.332B	$7.076B
YoY Change	0.8%	17.75%	9.19%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2018 Q4
OPERATING ACTIVITIES
Net Income	$170.1M	$120.3M	$57.79M
YoY Change	41.4%	108.16%	-50.0%
Depreciation, Depletion And Amortization	$81.40M	$78.10M	$64.70M
YoY Change	4.23%	20.71%	11.17%
Cash From Operating Activities	$276.1M	$626.8M	$137.2M
YoY Change	-55.95%	356.85%	-30.43%
INVESTING ACTIVITIES
Capital Expenditures	-$93.60M	-$54.60M	-$82.30M
YoY Change	71.43%	-33.66%	7.72%
Acquisitions
YoY Change
Other Investing Activities	-$49.40M	$44.10M	$1.300M
YoY Change	-212.02%	3292.31%	-98.14%
Cash From Investing Activities	-$143.0M	-$10.50M	-$81.00M
YoY Change	1261.9%	-87.04%	1146.15%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-166.2M	-531.0M	-89.50M
YoY Change	-68.7%	493.3%	-37.06%
NET CHANGE
Cash From Operating Activities	276.1M	626.8M	137.2M
Cash From Investing Activities	-143.0M	-10.50M	-81.00M
Cash From Financing Activities	-166.2M	-531.0M	-89.50M
Net Change In Cash	-33.10M	85.30M	-33.30M
YoY Change	-138.8%	-356.16%	-168.66%
FREE CASH FLOW
Cash From Operating Activities	$276.1M	$626.8M	$137.2M
Capital Expenditures	-$93.60M	-$54.60M	-$82.30M
Free Cash Flow	$369.7M	$681.4M	$219.5M
YoY Change	-45.74%	210.43%	-19.77%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001050915
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Entity Registrant Name EntityRegistrantName	Quanta Services, Inc.
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Entity File Number EntityFileNumber	001-13831
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	74-2851603
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	2800 Post Oak Boulevard, Suite 2600
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Houston
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	77056
CY2020	dei	City Area Code CityAreaCode	713
CY2020	dei	Local Phone Number LocalPhoneNumber	629-7600
CY2020	dei	Security12b Title Security12bTitle	Common Stock, $0.00001 par value
CY2020	dei	Trading Symbol TradingSymbol	PWR
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	5300000000	USD
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	138365007	shares
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	184620000	USD
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CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	16546000	USD
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CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	2716083000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	2747911000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	453832000	USD
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CY2019Q4	us-gaap	Goodwill Goodwill	2022675000	USD
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CY2019Q4	us-gaap	Liabilities Liabilities	4277851000	USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
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CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	857817000	USD
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CY2018	us-gaap	Profit Loss ProfitLoss	296007000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	11439000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	43535000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-84484000	USD
CY2020	pwr	Other Comprehensive Income Loss Other Tax OtherComprehensiveIncomeLossOtherTax	865000	USD
CY2019	pwr	Other Comprehensive Income Loss Other Tax OtherComprehensiveIncomeLossOtherTax	-200000	USD
CY2018	pwr	Other Comprehensive Income Loss Other Tax OtherComprehensiveIncomeLossOtherTax	-677000	USD
CY2020	pwr	Other Comprehensive Income Loss Other Net Of Tax OtherComprehensiveIncomeLossOtherNetOfTax	-2618000	USD
CY2019	pwr	Other Comprehensive Income Loss Other Net Of Tax OtherComprehensiveIncomeLossOtherNetOfTax	695000	USD
CY2018	pwr	Other Comprehensive Income Loss Other Net Of Tax OtherComprehensiveIncomeLossOtherNetOfTax	1831000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	8821000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	44230000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-82653000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	460780000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	451045000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	213354000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	6363000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	4771000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	2661000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	454417000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	446274000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	210693000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	451959000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	406815000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	296007000	USD
CY2020	us-gaap	Depreciation Depreciation	225256000	USD
CY2019	us-gaap	Depreciation Depreciation	218107000	USD
CY2018	us-gaap	Depreciation Depreciation	202519000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	76704000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	62091000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	43994000	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	8282000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	13892000	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	49375000	USD
CY2020	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	9311000	USD
CY2019	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	0	USD
CY2018	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	0	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	-719000	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	-13404000	USD
CY2018	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	11248000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1309000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	76801000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-52867000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	5126000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1870000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1270000	USD
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	3056000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	5797000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-3296000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	3656000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	11249000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	7169000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-60016000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-7919000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	61974000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	91641000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	52013000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	52484000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	5159000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	5568000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	385000	USD
CY2020	us-gaap	Payment For Contingent Consideration Liability Operating Activities PaymentForContingentConsiderationLiabilityOperatingActivities	14506000	USD
CY2019	us-gaap	Payment For Contingent Consideration Liability Operating Activities PaymentForContingentConsiderationLiabilityOperatingActivities	0	USD
CY2018	us-gaap	Payment For Contingent Consideration Liability Operating Activities PaymentForContingentConsiderationLiabilityOperatingActivities	0	USD
CY2020	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-327369000	USD
CY2019	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	156805000	USD
CY2018	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	400533000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1115977000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	526551000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	358789000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	260052000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	261762000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	293595000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	35390000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	31142000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	31780000	USD
CY2020	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	542000	USD
CY2019	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	1964000	USD
CY2018	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	714000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	292573000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	387966000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	94917000	USD
CY2020	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	18785000	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2018	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2020	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	14856000	USD
CY2019	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	47056000	USD
CY2018	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	36909000	USD
CY2020	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	13963000	USD
CY2019	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	46590000	USD
CY2018	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	4705000	USD
CY2020	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	522000	USD
CY2019	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	508000	USD
CY2018	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	14448000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-499323000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-617596000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-402670000	USD
CY2020	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	2983529000	USD
CY2019	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	6175558000	USD
CY2018	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	4491782000	USD
CY2020	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	4187645000	USD
CY2019	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	5903069000	USD
CY2018	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	4076460000	USD
CY2020	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	990130000	USD
CY2019	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	0	USD
CY2020	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	2970000	USD
CY2019	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	2203000	USD
CY2018	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	1298000	USD
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-4846000	USD
CY2019	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-28292000	USD
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	33790000	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	11089000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2309000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1976000	USD
CY2020	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	61483000	USD
CY2019	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2018	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2020	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	5404000	USD
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	2526000	USD
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	4038000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	25447000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	16144000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	15218000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	28891000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	23236000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	0	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	247249000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	20092000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	443152000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-601365000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	177687000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-16570000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1774000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-153000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-68000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	17063000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	86489000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-60519000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	169745000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	83256000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	143775000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	186808000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	169745000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	83256000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3795629000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-82653000	USD
CY2018	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	22882000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	37417000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	451290000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.04
CY2018	us-gaap	Dividends Cash DividendsCash	5838000	USD
CY2018	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	4038000	USD
CY2018	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	1387000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	296007000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3605453000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	44230000	USD
CY2019	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	1791000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	35086000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	11954000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.17
CY2019	us-gaap	Dividends Cash DividendsCash	25064000	USD
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	2526000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	406815000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4053831000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	8821000	USD
CY2020	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	57289000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	67032000	USD
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	249949000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.21
CY2020	us-gaap	Dividends Cash DividendsCash	30543000	USD
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	5404000	USD
CY2020	us-gaap	Stockholders Equity Other StockholdersEquityOther	223000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	451959000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4348972000	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	Segment
CY2019	pwr	Number Of Special Utility Foundation And Pole Setting Contractors NumberOfSpecialUtilityFoundationAndPoleSettingContractors	2	division
CY2018	pwr	Number Of Communications Infrastructure Services Businesses NumberOfCommunicationsInfrastructureServicesBusinesses	2	division
CY2020	us-gaap	Use Of Estimates UseOfEstimates	The preparation of financial statements in conformity with GAAP requires the use of estimates and assumptions by management in determining the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities known to exist as of the date the financial statements are published, and the reported amounts of revenues and expenses recognized during the periods presented. Quanta reviews all significant estimates affecting its consolidated financial statements on a recurring basis and records the effect of any necessary adjustments prior to their publication. Judgments and estimates are based on Quanta’s beliefs and assumptions derived from information available at the time such judgments and estimates are made. Uncertainties with respect to such estimates and assumptions are inherent in the preparation of financial statements. Estimates are primarily used in Quanta’s assessment of the allowance for credit losses, valuation of inventory, useful lives of assets, fair value assumptions in analyzing goodwill, other intangibles and long-lived asset impairments, equity and other investments, purchase price allocations, acquisition-related contingent consideration liabilities, multiemployer pension plan withdrawal liabilities, contingent liabilities associated with, among other things, legal proceedings and claims, parent guarantees and indemnity obligations, revenue recognition for construction contracts inclusive of contractual change orders and claims, estimated insurance claim recoveries, stock-based compensation, operating results of reportable segments, provision for income taxes, and uncertain tax positions.
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	3990000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	5300000000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.712
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.595
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2020Q4	pwr	Revenue Recognized Related To Unapproved Change Orders And Claims RevenueRecognizedRelatedToUnapprovedChangeOrdersAndClaims	141200000	USD
CY2019Q4	pwr	Revenue Recognized Related To Unapproved Change Orders And Claims RevenueRecognizedRelatedToUnapprovedChangeOrdersAndClaims	170000000.0	USD
CY2019	pwr	Contract With Customer Cumulative Catch Up Adjustment To Gross Profit Change In Estimate Percent ContractWithCustomerCumulativeCatchUpAdjustmentToGrossProfitChangeInEstimatePercent	0.05
CY2018	pwr	Contract With Customer Cumulative Catch Up Adjustment To Gross Profit Change In Estimate Percent ContractWithCustomerCumulativeCatchUpAdjustmentToGrossProfitChangeInEstimatePercent	0.05
CY2020	pwr	Contract With Customer Cumulative Catch Up Adjustment To Gross Profit Change In Estimate Percent ContractWithCustomerCumulativeCatchUpAdjustmentToGrossProfitChangeInEstimatePercent	0.05
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11202672000	USD
CY2020	pwr	Percentage Of Total Revenues PercentageOfTotalRevenues	1.000
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12112153000	USD
CY2019	pwr	Percentage Of Total Revenues PercentageOfTotalRevenues	1.000
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11171423000	USD
CY2018	pwr	Percentage Of Total Revenues PercentageOfTotalRevenues	1.000
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11202672000	USD
CY2020	pwr	Percentage Of Total Revenues PercentageOfTotalRevenues	1.000
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12112153000	USD
CY2019	pwr	Percentage Of Total Revenues PercentageOfTotalRevenues	1.000
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11171423000	USD
CY2018	pwr	Percentage Of Total Revenues PercentageOfTotalRevenues	1.000
CY2020	pwr	Revenue From Contract With Customer Percentage Of Revenue Recognized Over Time RevenueFromContractWithCustomerPercentageOfRevenueRecognizedOverTime	0.479
CY2019	pwr	Revenue From Contract With Customer Percentage Of Revenue Recognized Over Time RevenueFromContractWithCustomerPercentageOfRevenueRecognizedOverTime	0.500
CY2018	pwr	Revenue From Contract With Customer Percentage Of Revenue Recognized Over Time RevenueFromContractWithCustomerPercentageOfRevenueRecognizedOverTime	0.577
CY2020Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	453832000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	601268000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	576891000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	528864000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	606146000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	425961000	USD
CY2020	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	27000000.0	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	491500000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Noncurrent AccountsReceivableNetNoncurrent	12400000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	9398000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	5839000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	4465000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	3656000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	11249000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	7169000	USD
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	1575000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	7690000	USD
CY2018	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	5795000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	16546000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	9398000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	5839000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Noncurrent AccountsReceivableNetNoncurrent	13400000	USD
CY2020Q4	us-gaap	Contract With Customer Receivable After Allowance For Credit Loss Current ContractWithCustomerReceivableAfterAllowanceForCreditLossCurrent	306300000	USD
CY2019Q4	us-gaap	Contract With Customer Receivable After Allowance For Credit Loss Current ContractWithCustomerReceivableAfterAllowanceForCreditLossCurrent	299600000	USD
CY2020Q4	us-gaap	Contract With Customer Receivable After Allowance For Credit Loss Noncurrent ContractWithCustomerReceivableAfterAllowanceForCreditLossNoncurrent	88200000	USD
CY2019Q4	us-gaap	Contract With Customer Receivable After Allowance For Credit Loss Noncurrent ContractWithCustomerReceivableAfterAllowanceForCreditLossNoncurrent	54200000	USD
CY2020Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	472300000	USD
CY2019Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	524300000	USD
CY2018Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	434900000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	184620000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	164798000	USD
CY2020Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	98000000.0	USD
CY2019Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	37800000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	184620000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	164798000	USD
CY2020	us-gaap	Depreciation Depreciation	225300000	USD
CY2019	us-gaap	Depreciation Depreciation	218100000	USD
CY2018	us-gaap	Depreciation Depreciation	202500000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	11300000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	10000000.0	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	8300000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	13900000	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	49400000	USD
CY2018Q4	us-gaap	Disposal Group Including Discontinued Operation Property Plant And Equipment Current DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentCurrent	14000000.0	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	11100000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2300000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2000000.0	USD
CY2020Q4	us-gaap	Deferred Finance Costs Ownshare Lending Arrangement Issuance Costs Gross DeferredFinanceCostsOwnshareLendingArrangementIssuanceCostsGross	10300000	USD
CY2019Q4	us-gaap	Deferred Finance Costs Ownshare Lending Arrangement Issuance Costs Gross DeferredFinanceCostsOwnshareLendingArrangementIssuanceCostsGross	17200000	USD
CY2020Q4	us-gaap	Deferred Finance Costs Ownshare Lending Arrangement Issuance Costs Accumulated Amortization DeferredFinanceCostsOwnshareLendingArrangementIssuanceCostsAccumulatedAmortization	600000	USD
CY2019Q4	us-gaap	Deferred Finance Costs Ownshare Lending Arrangement Issuance Costs Accumulated Amortization DeferredFinanceCostsOwnshareLendingArrangementIssuanceCostsAccumulatedAmortization	10500000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	5100000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1900000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1300000	USD
CY2020	pwr	Number Of Internal Divisions NumberOfInternalDivisions	2	Divisions
CY2020	pwr	Periods Of Cash Flows Before Terminal Value PeriodsOfCashFlowsBeforeTerminalValue	P5Y
CY2019	pwr	Periods Of Cash Flows Before Terminal Value PeriodsOfCashFlowsBeforeTerminalValue	P5Y
CY2018	pwr	Periods Of Cash Flows Before Terminal Value PeriodsOfCashFlowsBeforeTerminalValue	P5Y
CY2020	pwr	Discounted Cash Flows Weighted Percentage DiscountedCashFlowsWeightedPercentage	1
CY2019	pwr	Discounted Cash Flows Weighted Percentage DiscountedCashFlowsWeightedPercentage	0.70
CY2018	pwr	Discounted Cash Flows Weighted Percentage DiscountedCashFlowsWeightedPercentage	0.70
CY2020	pwr	Market Multiple Weighted Percentage MarketMultipleWeightedPercentage	0
CY2019	pwr	Market Multiple Weighted Percentage MarketMultipleWeightedPercentage	0.15
CY2018	pwr	Market Multiple Weighted Percentage MarketMultipleWeightedPercentage	0.15
CY2020	pwr	Market Capitalization Weighted Percentage MarketCapitalizationWeightedPercentage	0
CY2019	pwr	Market Capitalization Weighted Percentage MarketCapitalizationWeightedPercentage	0.15
CY2018	pwr	Market Capitalization Weighted Percentage MarketCapitalizationWeightedPercentage	0.15
CY2020Q4	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019Q4	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018Q4	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	pwr	Goodwill Sensitivity Analysis Percentage GoodwillSensitivityAnalysisPercentage	0.10
CY2020	pwr	Number Of Reporting Units At Risk After Cushion Test NumberOfReportingUnitsAtRiskAfterCushionTest	3	Reporting_Unit
CY2020	pwr	Goodwill Sensitivity Analysis Percentage GoodwillSensitivityAnalysisPercentage	0.10
CY2020	pwr	Goodwill Sensitivity Analysis Percentage GoodwillSensitivityAnalysisPercentage	0.10
CY2020	pwr	Workers Compensation Insurance Claims Deductible WorkersCompensationInsuranceClaimsDeductible	5000000.0	USD
CY2020Q2	pwr	Operation And Maintenance Agreement Length Of System OperationAndMaintenanceAgreementLengthOfSystem	18000	mile
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	33200000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-7700000	USD
CY2020	pwr	Unrecognized Tax Benefits Decrease Resulting From Settlement UnrecognizedTaxBenefitsDecreaseResultingFromSettlement	3300000	USD
CY2020	pwr	Unrecognized Tax Benefits Decrease Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsDecreaseResultingFromLapseOfApplicableStatuteOfLimitations	8700000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	4400000	USD
CY2020Q4	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	11900000	USD
CY2020	pwr	Number Of Shares Of Common Stock Received For Each Exchangeable Share NumberOfSharesOfCommonStockReceivedForEachExchangeableShare	1	shares
CY2020	pwr	Employers Liability Insurance Claims Deductible EmployersLiabilityInsuranceClaimsDeductible	5000000.0	USD
CY2018	us-gaap	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	332973000	USD
CY2020	pwr	Business Acquisitions Pro Forma Net Income Loss Attributable To Common Stock Net Of Tax BusinessAcquisitionsProFormaNetIncomeLossAttributableToCommonStockNetOfTax	453527000	USD
CY2020	pwr	General Liability Insurance Claims Deductible GeneralLiabilityInsuranceClaimsDeductible	15000000.0	USD
CY2020	pwr	Auto Liability Insurance Claims Deductible AutoLiabilityInsuranceClaimsDeductible	15000000.0	USD
CY2020	pwr	Health Care Deductible HealthCareDeductible	800000	USD
CY2019	pwr	Business Acquisitions Pro Forma Amortization Of Intangible Assets BusinessAcquisitionsProFormaAmortizationOfIntangibleAssets	-95185000	USD
CY2018	pwr	Business Acquisitions Pro Forma Amortization Of Intangible Assets BusinessAcquisitionsProFormaAmortizationOfIntangibleAssets	-79454000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	76000000.0	USD
CY2020	pwr	Business Combination Contingent Consideration Arrangements Shares Transferred In Settlement BusinessCombinationContingentConsiderationArrangementsSharesTransferredInSettlement	4277	shares
CY2020Q4	us-gaap	Business Combination Contingent Consideration Arrangements Range Of Outcomes Value High BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh	13900000	USD
CY2019Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	301100000	USD
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	301100000	USD
CY2019	pwr	Number Of Special Utility Foundation And Pole Setting Contractors NumberOfSpecialUtilityFoundationAndPoleSettingContractors	2	division
CY2018	pwr	Number Of Communications Infrastructure Services Businesses NumberOfCommunicationsInfrastructureServicesBusinesses	2	division
CY2020	us-gaap	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	459890000	USD
CY2019	us-gaap	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	434593000	USD
CY2020	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	11400807000	USD
CY2019	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	12844508000	USD
CY2018	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	11894866000	USD
CY2020	pwr	Business Acquisitions Pro Forma Gross Profit BusinessAcquisitionsProFormaGrossProfit	1708844000	USD
CY2019	pwr	Business Acquisitions Pro Forma Gross Profit BusinessAcquisitionsProFormaGrossProfit	1761317000	USD
CY2018	pwr	Business Acquisitions Pro Forma Gross Profit BusinessAcquisitionsProFormaGrossProfit	1635777000	USD
CY2020	pwr	Business Acquisitions Pro Forma Selling General And Administrative Expenses BusinessAcquisitionsProFormaSellingGeneralAndAdministrativeExpenses	-998283000	USD
CY2019	pwr	Business Acquisitions Pro Forma Selling General And Administrative Expenses BusinessAcquisitionsProFormaSellingGeneralAndAdministrativeExpenses	-1027254000	USD
CY2018	pwr	Business Acquisitions Pro Forma Selling General And Administrative Expenses BusinessAcquisitionsProFormaSellingGeneralAndAdministrativeExpenses	-913392000	USD
CY2020	pwr	Business Acquisitions Pro Forma Amortization Of Intangible Assets BusinessAcquisitionsProFormaAmortizationOfIntangibleAssets	-86721000	USD
CY2019	pwr	Business Acquisitions Pro Forma Net Income Loss Attributable To Common Stock Net Of Tax BusinessAcquisitionsProFormaNetIncomeLossAttributableToCommonStockNetOfTax	429822000	USD
CY2018	pwr	Business Acquisitions Pro Forma Net Income Loss Attributable To Common Stock Net Of Tax BusinessAcquisitionsProFormaNetIncomeLossAttributableToCommonStockNetOfTax	330312000	USD
CY2020	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Basic BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic	3.19
CY2019	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Basic BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic	2.92
CY2018	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Basic BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic	2.16
CY2020	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Diluted BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted	3.11
CY2019	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Diluted BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted	2.89
CY2018	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Diluted BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted	2.14
CY2020	pwr	Number Of Internal Divisions NumberOfInternalDivisions	2	division
CY2017Q4	us-gaap	Goodwill Gross GoodwillGross	1966432000	USD
CY2017Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	97832000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	1868600000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	56337000	USD
CY2018	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	51000	USD
CY2018	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-25109000	USD
CY2018Q4	us-gaap	Goodwill Gross GoodwillGross	1996362000	USD
CY2018Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	96483000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	1899879000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	110383000	USD
CY2019	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	1503000	USD
CY2019	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	10910000	USD
CY2019Q4	us-gaap	Goodwill Gross GoodwillGross	2119101000	USD
CY2019Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	96426000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	2022675000	USD
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	86197000	USD
CY2020	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	1749000	USD
CY2020	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	10393000	USD
CY2020Q4	us-gaap	Goodwill Gross GoodwillGross	2218642000	USD
CY2020Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	97628000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	2121014000	USD
CY2020	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P6Y9M18D
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	432655000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	517574000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	950229000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	848620000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	437886000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	410734000	USD
CY2020Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	953229000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	517574000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	435655000	USD
CY2019Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	851620000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	437886000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	413734000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	76700000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	62100000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	44000000.0	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	84748000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	77119000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	68319000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	55357000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	43805000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	103307000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	432655000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	445596000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	402044000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	293346000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	141380000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	145710000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	152963000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3867000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1824000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1263000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	145247000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	147534000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	154226000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	1600000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	2800000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	2600000	shares
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	52160000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	14162000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	2932788000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	2636851000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	1372132000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	1250197000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	1560656000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	1386654000	USD
CY2020Q4	us-gaap	Contract With Customer Receivable Before Allowance For Credit Loss ContractWithCustomerReceivableBeforeAllowanceForCreditLoss	119648000	USD
CY2019Q4	us-gaap	Contract With Customer Receivable Before Allowance For Credit Loss ContractWithCustomerReceivableBeforeAllowanceForCreditLoss	119648000	USD
CY2020Q4	pwr	Contract Receivable Retainage Noncurrent ContractReceivableRetainageNoncurrent	88234000	USD
CY2019Q4	pwr	Contract Receivable Retainage Noncurrent ContractReceivableRetainageNoncurrent	54235000	USD
CY2020Q4	pwr	Investments In Unconsolidated Affiliates InvestmentsInUnconsolidatedAffiliates	84367000	USD
CY2019Q4	pwr	Investments In Unconsolidated Affiliates InvestmentsInUnconsolidatedAffiliates	89568000	USD
CY2020Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	55855000	USD
CY2019Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	45273000	USD
CY2020Q4	us-gaap	Insurance Settlements Receivable Noncurrent InsuranceSettlementsReceivableNoncurrent	35164000	USD
CY2019Q4	us-gaap	Insurance Settlements Receivable Noncurrent InsuranceSettlementsReceivableNoncurrent	34785000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	17685000	USD
CY2019Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	12545000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Noncurrent AccountsReceivableNetNoncurrent	13367000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Noncurrent AccountsReceivableNetNoncurrent	12427000	USD
CY2020Q4	pwr	Deferred Offering Costs Noncurrent DeferredOfferingCostsNoncurrent	9695000	USD
CY2019Q4	pwr	Deferred Offering Costs Noncurrent DeferredOfferingCostsNoncurrent	6695000	USD
CY2020Q4	pwr	Other Non Current Assets OtherNonCurrentAssets	11698000	USD
CY2019Q4	pwr	Other Non Current Assets OtherNonCurrentAssets	18088000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	435713000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	393264000	USD
CY2020Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	798023000	USD
CY2019Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	798718000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	378002000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	316237000	USD
CY2020Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	80926000	USD
CY2019Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	69307000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	32315000	USD
CY2019Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	58353000	USD
CY2020Q4	pwr	Contract With Customer Liability Deferred Revenues Current ContractWithCustomerLiabilityDeferredRevenuesCurrent	53562000	USD
CY2019Q4	pwr	Contract With Customer Liability Deferred Revenues Current ContractWithCustomerLiabilityDeferredRevenuesCurrent	33192000	USD
CY2020Q4	us-gaap	Sales And Excise Tax Payable Current SalesAndExciseTaxPayableCurrent	30587000	USD
CY2019Q4	us-gaap	Sales And Excise Tax Payable Current SalesAndExciseTaxPayableCurrent	28721000	USD
CY2020Q4	us-gaap	Business Combination Contingent Consideration Liability Current BusinessCombinationContingentConsiderationLiabilityCurrent	3466000	USD
CY2019Q4	us-gaap	Business Combination Contingent Consideration Liability Current BusinessCombinationContingentConsiderationLiabilityCurrent	77618000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	132913000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	107413000	USD
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	1509794000	USD
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	1489559000	USD
CY2020Q4	us-gaap	Line Of Credit LineOfCredit	148508000	USD
CY2019Q4	us-gaap	Line Of Credit LineOfCredit	1346290000	USD
CY2020Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	46981000	USD
CY2019Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	13275000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	2228000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	957000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	1184825000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	1360522000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	10531000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	68327000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1174294000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1292195000	USD
CY2019	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	1553499000	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	4233000	USD
CY2019Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	6542000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	10531000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	68327000	USD
CY2020Q4	us-gaap	Debt Current DebtCurrent	14764000	USD
CY2019Q4	us-gaap	Debt Current DebtCurrent	74869000	USD
CY2020Q4	us-gaap	Line Of Credit LineOfCredit	148500000	USD
CY2020	us-gaap	Line Of Credit Facility Maximum Amount Outstanding During Period LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod	2023326000	USD
CY2019	us-gaap	Line Of Credit Facility Maximum Amount Outstanding During Period LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod	2051714000	USD
CY2018	us-gaap	Line Of Credit Facility Maximum Amount Outstanding During Period LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod	1300401000	USD
CY2020	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	1091091000	USD
CY2018	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	914012000	USD
CY2020	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.021
CY2019	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.038
CY2018	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.036
CY2020Q4	us-gaap	Lessee Operating Lease Term Of Contract LesseeOperatingLeaseTermOfContract	P9Y9M18D
CY2020Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P5Y
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1234000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1393000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	107000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	64000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	116672000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	121767000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	656649000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	837244000	USD
CY2020	us-gaap	Lease Cost LeaseCost	774662000	USD
CY2019	us-gaap	Lease Cost LeaseCost	960468000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	309700000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	256845000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	284369000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	2370000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	1043000	USD
CY2020Q4	pwr	Operating And Finance Lease Right Of Use Asset OperatingAndFinanceLeaseRightOfUseAsset	259215000	USD
CY2019Q4	pwr	Operating And Finance Lease Right Of Use Asset OperatingAndFinanceLeaseRightOfUseAsset	285412000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	85134000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	92475000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	846000	USD
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	440000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	178822000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	196521000	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	1382000	USD
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	517000	USD
CY2020Q4	pwr	Operating And Finance Lease Liability OperatingAndFinanceLeaseLiability	266184000	USD
CY2019Q4	pwr	Operating And Finance Lease Liability OperatingAndFinanceLeaseLiability	289953000	USD
CY2020Q4	pwr	Leases Option To Purchase Asset Failed Sale Leaseback LeasesOptionToPurchaseAssetFailedSaleLeaseback	45700000	USD
CY2019Q4	pwr	Leases Option To Purchase Asset Failed Sale Leaseback LeasesOptionToPurchaseAssetFailedSaleLeaseback	11800000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	94166000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	920000	USD
CY2020Q4	pwr	Operating And Finance Lease Liabilities Payments Next Twelve Months OperatingAndFinanceLeaseLiabilitiesPaymentsNextTwelveMonths	95086000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	68284000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	690000	USD
CY2020Q4	pwr	Operating And Finance Lease Liabilities Payments Due Year Two OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearTwo	68974000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	47872000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	493000	USD
CY2020Q4	pwr	Operating And Finance Lease Liabilities Payments Due Year Three OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearThree	48365000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	29362000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	264000	USD
CY2020Q4	pwr	Operating And Finance Lease Liabilities Payments Due Year Four OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearFour	29626000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	18685000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	USD
CY2020Q4	pwr	Operating And Finance Lease Liabilities Payments Due Year Five OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearFive	18685000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	30311000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2020Q4	pwr	Operating And Finance Lease Liabilities Payments Due After Year Five OperatingAndFinanceLeaseLiabilitiesPaymentsDueAfterYearFive	30311000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	288680000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	2367000	USD
CY2020Q4	pwr	Operating And Finance Lease Liabilities Payments Due OperatingAndFinanceLeaseLiabilitiesPaymentsDue	291047000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	24724000	USD
CY2020Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	139000	USD
CY2020Q4	pwr	Operating And Finance Lease Liabilities Undiscounted Excess Amount OperatingAndFinanceLeaseLiabilitiesUndiscountedExcessAmount	24863000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	263956000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	2228000	USD
CY2020Q4	pwr	Operating And Finance Lease Liability OperatingAndFinanceLeaseLiability	266184000	USD
CY2020Q4	us-gaap	Short Term Lease Commitment Amount ShortTermLeaseCommitmentAmount	13600000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y3M10D
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y21D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.042
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.041
CY2020Q4	us-gaap	Operating Lease Residual Value Of Leased Asset OperatingLeaseResidualValueOfLeasedAsset	779100000	USD
CY2020Q4	pwr	Lessee Operating Lease Lease Not Yet Commenced Liability LesseeOperatingLeaseLeaseNotYetCommencedLiability	3400000	USD
CY2018	pwr	Tax Cuts And Jobs Act Of2017 Measurement Period Adjustment Remeasurement Income Tax Expense Benefit TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentRemeasurementIncomeTaxExpenseBenefit	-6300000	USD
CY2018	pwr	Tax Cuts And Jobs Act Of2017 Restructuring Activities Remeasurement Income Tax Expense Benefit TaxCutsAndJobsActOf2017RestructuringActivitiesRemeasurementIncomeTaxExpenseBenefit	1800000	USD
CY2018Q4	pwr	Tax Cuts And Jobs Act Of2017 Foreign Tax Credits Valuation Allowance TaxCutsAndJobsActOf2017ForeignTaxCreditsValuationAllowance	43500000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	632791000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	550676000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	318635000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-61445000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	21611000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	139031000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	571346000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	572287000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	457666000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	134538000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	121214000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	50306000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	45610000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	35329000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	26170000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-745000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	16848000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	23209000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	179403000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	173391000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	99685000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-46251000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	7379000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	62482000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-3850000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1776000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-4152000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-9915000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-13522000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	3644000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-60016000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-7919000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	61974000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	119387000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	165472000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	161659000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	119983000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	120180000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	96110000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	31791000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	23399000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	18504000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Meals And Entertainment IncomeTaxReconciliationNondeductibleExpenseMealsAndEntertainment	10680000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Meals And Entertainment IncomeTaxReconciliationNondeductibleExpenseMealsAndEntertainment	13817000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Meals And Entertainment IncomeTaxReconciliationNondeductibleExpenseMealsAndEntertainment	11949000	USD
CY2020	pwr	Effective Income Tax Rate Reconciliation Tax Credit Valuation Allowance EffectiveIncomeTaxRateReconciliationTaxCreditValuationAllowance	-31138000	USD
CY2019	pwr	Effective Income Tax Rate Reconciliation Tax Credit Valuation Allowance EffectiveIncomeTaxRateReconciliationTaxCreditValuationAllowance	35761000	USD
CY2018	pwr	Effective Income Tax Rate Reconciliation Tax Credit Valuation Allowance EffectiveIncomeTaxRateReconciliationTaxCreditValuationAllowance	48862000	USD
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-9641000	USD
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-21565000	USD
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-2621000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-3109000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-1863000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-1449000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-2125000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-3173000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-2619000	USD
CY2020	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	1093000	USD
CY2019	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	930000	USD
CY2018	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	578000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	0	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	0	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	-6295000	USD
CY2020	pwr	Effective Income Tax Rate Reconciliation Entity Restructuring And Recapitalization Efforts Amount EffectiveIncomeTaxRateReconciliationEntityRestructuringAndRecapitalizationEffortsAmount	0	USD
CY2019	pwr	Effective Income Tax Rate Reconciliation Entity Restructuring And Recapitalization Efforts Amount EffectiveIncomeTaxRateReconciliationEntityRestructuringAndRecapitalizationEffortsAmount	0	USD
CY2018	pwr	Effective Income Tax Rate Reconciliation Entity Restructuring And Recapitalization Efforts Amount EffectiveIncomeTaxRateReconciliationEntityRestructuringAndRecapitalizationEffortsAmount	4424000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	4039000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-154000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	4220000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	119387000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	165472000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	161659000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	236256000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	208751000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	85467000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	72244000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	77344000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	73861000	USD
CY2020Q4	pwr	Deferred Tax Liabilities Customer Holdbacks DeferredTaxLiabilitiesCustomerHoldbacks	30457000	USD
CY2019Q4	pwr	Deferred Tax Liabilities Customer Holdbacks DeferredTaxLiabilitiesCustomerHoldbacks	11882000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	4438000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	11384000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	0	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1801000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	433962000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	379923000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	82817000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	78310000	USD
CY2020Q4	pwr	Deferred Tax Assets Leasing Arrangements DeferredTaxAssetsLeasingArrangements	76826000	USD
CY2019Q4	pwr	Deferred Tax Assets Leasing Arrangements DeferredTaxAssetsLeasingArrangements	74044000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	70335000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	36372000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	42202000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	46621000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	36590000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	26045000	USD
CY2020Q4	pwr	Deferred Tax Assets Deferred Tax Benefits On Unrecognized Tax Positions DeferredTaxAssetsDeferredTaxBenefitsOnUnrecognizedTaxPositions	10108000	USD
CY2019Q4	pwr	Deferred Tax Assets Deferred Tax Benefits On Unrecognized Tax Positions DeferredTaxAssetsDeferredTaxBenefitsOnUnrecognizedTaxPositions	16542000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	9617000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3933000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	328495000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	281867000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	43255000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	104178000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	285240000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	177689000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	148722000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	202234000	USD
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CY2019Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	12545000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	166407000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	214779000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	148722000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	202234000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	43300000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	104200000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	67600000	USD
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-60900000	USD
CY2019	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	36600000	USD
CY2018	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	48300000	USD
CY2020Q4	pwr	Expiration Amount Of State And Foreign Net Operating Loss Carryforwards Year One ExpirationAmountOfStateAndForeignNetOperatingLossCarryforwardsYearOne	500000	USD
CY2020Q4	pwr	Expiration Amount Of State And Foreign Net Operating Loss Carryforwards Year Two ExpirationAmountOfStateAndForeignNetOperatingLossCarryforwardsYearTwo	200000	USD
CY2020Q4	pwr	Expiration Amount Of State And Foreign Net Operating Loss Carryforwards Year Three ExpirationAmountOfStateAndForeignNetOperatingLossCarryforwardsYearThree	3200000	USD
CY2020Q4	pwr	Expiration Amount Of State And Foreign Net Operating Loss Carryforwards Year Four ExpirationAmountOfStateAndForeignNetOperatingLossCarryforwardsYearFour	1000000.0	USD
CY2020Q4	pwr	Expiration Amount Of State And Foreign Net Operating Loss Carryforwards Year Five ExpirationAmountOfStateAndForeignNetOperatingLossCarryforwardsYearFive	7400000	USD
CY2020Q4	pwr	Expiration Amount Of State And Foreign Net Operating Loss Carryforwards Thereafter ExpirationAmountOfStateAndForeignNetOperatingLossCarryforwardsThereafter	75800000	USD
CY2020Q4	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	42300000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	40878000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	41110000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	36229000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	4398000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	7708000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	6231000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1200000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	9377000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2410000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2870000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	930000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	3205000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	8717000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	5935000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	7857000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	33219000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	40878000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	41110000	USD
CY2020	pwr	Unrecognized Tax Benefits Decrease Resulting From Settlements With Taxing Authorities And Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsDecreaseResultingFromSettlementsWithTaxingAuthoritiesAndLapseOfApplicableStatuteOfLimitations	12100000	USD
CY2019	pwr	Unrecognized Tax Benefits Decrease Resulting From Settlements With Taxing Authorities And Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsDecreaseResultingFromSettlementsWithTaxingAuthoritiesAndLapseOfApplicableStatuteOfLimitations	9100000	USD
CY2018	pwr	Unrecognized Tax Benefits Decrease Resulting From Settlements With Taxing Authorities And Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsDecreaseResultingFromSettlementsWithTaxingAuthoritiesAndLapseOfApplicableStatuteOfLimitations	7900000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	33219000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	40878000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	41110000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	30868000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	40695000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	40977000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	5204000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	6240000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	5459000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	14000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	14000	USD
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CY2020	pwr	Income Tax Examination Penalties And Interest Expense Income IncomeTaxExaminationPenaltiesAndInterestExpenseIncome	-700000	USD
CY2019	pwr	Income Tax Examination Penalties And Interest Expense Income IncomeTaxExaminationPenaltiesAndInterestExpenseIncome	800000	USD
CY2018	pwr	Income Tax Examination Penalties And Interest Expense Income IncomeTaxExaminationPenaltiesAndInterestExpenseIncome	100000	USD
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CY2020	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	6680000	shares
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	249949000	USD
CY2019	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	376000	shares
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	11954000	USD
CY2018	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	13917000	shares
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	451290000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	247200000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	20100000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	443200000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	6400000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	4800000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2700000	USD
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	5400000	USD
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	2500000	USD
CY2018	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	4000000.0	USD
CY2020Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.06
CY2020Q4	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	8933000	USD
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.05
CY2020Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	7244000	USD
CY2020Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.05
CY2020Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	7182000	USD
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CY2020Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	7184000	USD
CY2019Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.05
CY2019Q4	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	7371000	USD
CY2019Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.04
CY2019Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5564000	USD
CY2019Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.04
CY2019Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	6233000	USD
CY2019Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.04
CY2019Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5896000	USD
CY2018Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.04
CY2018Q4	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5838000	USD
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CY2020	us-gaap	Multiemployer Plan Employer Contribution Cost MultiemployerPlanEmployerContributionCost	121978000	USD
CY2019	us-gaap	Multiemployer Plan Employer Contribution Cost MultiemployerPlanEmployerContributionCost	134197000	USD
CY2018	us-gaap	Multiemployer Plan Employer Contribution Cost MultiemployerPlanEmployerContributionCost	126191000	USD
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CY2020	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	-71058000	USD
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CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	45900000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	41400000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	33400000	USD
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	1300000	USD
CY2019	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	1100000	USD
CY2018	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	1100000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	USD
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	USD
CY2020Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	58200000	USD
CY2019Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	47300000	USD
CY2020Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	56500000	USD
CY2019Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	45800000	USD
CY2019	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	214580000	USD
CY2018	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	475919000	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	Segment
CY2020	pwr	Number Of Internal Divisions NumberOfInternalDivisions	2	Divisions
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11202672000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12112153000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11171423000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	611371000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	554874000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	540269000	USD
CY2020	us-gaap	Depreciation Depreciation	225256000	USD
CY2019	us-gaap	Depreciation Depreciation	218107000	USD
CY2018	us-gaap	Depreciation Depreciation	202519000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-153832000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	12317000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	92838000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-9860000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-52168000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	28131000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-83518000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	60475000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	40187000	USD
CY2020	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	115569000	USD
CY2019	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	39419000	USD
CY2018	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	247897000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-84370000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	174230000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-23000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	22098000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	135250000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	11332000	USD
CY2020	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-327369000	USD
CY2019	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	156805000	USD
CY2018	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	400533000	USD
CY2019	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	87000000	USD
CY2019	pwr	Payments For On Demand Performance Bonds PaymentsForOnDemandPerformanceBonds	25000000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	184620000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	164798000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	78687000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	138285000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	186808000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	169745000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	83256000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	143775000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	115597000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	119357000	USD
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	108000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	64000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1198000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1835000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	69721000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	96550000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	1384000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	691000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	32142000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	64805000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	34935000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	231186000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	116467000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	112895000	USD
CY2020	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	18119000	USD
CY2019	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	7474000	USD
CY2018	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	5209000	USD
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	6100000	USD
CY2020	us-gaap	Noncash Or Part Noncash Divestiture Amount Of Consideration Received1 NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1	4700000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	6400000	USD

Files In Submission

Name	View Source	Status
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$PWR
QUANTA SERVICES, INC. Stock $pwr

2020 Q4 Form 10-K Financial Statement

#000105091521000009 Filed on March 01, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PWR QUANTA SERVICES, INC. Stock $pwr

2020 Q4 Form 10-K Financial Statement

#000105091521000009 Filed on March 01, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PWR
QUANTA SERVICES, INC. Stock $pwr