Equity - Additional Information (Detail) (USD $)
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3 Months Ended | 15 Months Ended | ||
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Mar. 31, 2015
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Mar. 31, 2014
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Mar. 31, 2015
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Dec. 31, 2014
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Equity [Line Items] | ||||
Minimum number of shares that can be exchanged by exchangeable shareholders unless the number of remaining exchangeable shares registered in the name of the holder is less | 50,000pwr_MinimumNumberOfSharesThatCanBeExchangedByExchangeableShareholdersUnlessNumberOfRemainingExchangeableSharesRegisteredInNameOfHolderIsLess | |||
Number of shares of Common stock received for each exchangeable share | 1pwr_NumberOfSharesOfCommonStockReceivedForEachExchangeableShare | |||
Shares outstanding | 204,495,383us-gaap_CommonStockSharesOutstanding | 204,495,383us-gaap_CommonStockSharesOutstanding | 210,819,790us-gaap_CommonStockSharesOutstanding | |
Income attributable to the other joint venture members | $ 4,700,000us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable | $ 4,200,000us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable | ||
Carrying value of the investments held by Quanta in variable interest entities | 13,300,000us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet | 13,300,000us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet | 11,100,000us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet | |
Carrying value of the investment held by noncontrolling interest in variable interest entities | 13,265,000us-gaap_MinorityInterest | 13,265,000us-gaap_MinorityInterest | 11,067,000us-gaap_MinorityInterest | |
Distributions to non-controlling interests | 2,500,000us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders | 500,000us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders | ||
Maximum [Member] | ||||
Equity [Line Items] | ||||
Aggregate authorized amount of common stock to be repurchased |
500,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1 / us-gaap_RangeAxis = us-gaap_MaximumMember |
500,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1 / us-gaap_RangeAxis = us-gaap_MaximumMember |
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Treasury Stock [Member] | ||||
Equity [Line Items] | ||||
Treasury stock acquired |
6,700,000us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
9,700,000us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
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Value of treasury stock acquired, cost method |
182,000,000us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
275,500,000us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
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Series F Preferred Stock [Member] | ||||
Equity [Line Items] | ||||
Number of preferred Stock issued to voting trust |
1us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember |
1us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember |
1us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember |
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Series G Preferred Stock [Member] | ||||
Equity [Line Items] | ||||
Number of preferred Stock issued to voting trust |
1us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
1us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
1us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
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Exchangeable Shares [Member] | ||||
Equity [Line Items] | ||||
Shares outstanding |
7,325,971us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_ConvertibleCommonStockMember |
7,325,971us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_ConvertibleCommonStockMember |
7,325,971us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_ConvertibleCommonStockMember |
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Series F- and Series G- Preferred Stock [Member] | ||||
Equity [Line Items] | ||||
Exchangeable stock shares outstanding |
4,399,858pwr_ExchangeableStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = pwr_SeriesFAndSeriesGPreferredStockMember |
4,399,858pwr_ExchangeableStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = pwr_SeriesFAndSeriesGPreferredStockMember |
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Common Stock Withheld for Settlement of Employee Tax Liabilities [Member] | Treasury Stock [Member] | ||||
Equity [Line Items] | ||||
Treasury stock acquired |
300,000us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementClassOfStockAxis = pwr_CommonStockWithheldForSettlementOfEmployeeTaxLiabilitiesMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
300,000us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementClassOfStockAxis = pwr_CommonStockWithheldForSettlementOfEmployeeTaxLiabilitiesMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
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Value of treasury stock acquired, cost method |
$ 9,500,000us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementClassOfStockAxis = pwr_CommonStockWithheldForSettlementOfEmployeeTaxLiabilitiesMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
$ 11,400,000us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementClassOfStockAxis = pwr_CommonStockWithheldForSettlementOfEmployeeTaxLiabilitiesMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
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- Definition
Exchangeable Stock Shares Outstanding No definition available.
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Minimum number of shares that can be exchanged by exchangeable shareholders unless number of remaining exchangeable shares registered in name of holder is less. No definition available.
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Number of shares of common stock received for each exchangeable share. No definition available.
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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount after tax of income (loss) attributable to nonredeemable noncontrolling shareholder, unit holder, partner, or other equity holder of a joint venture. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of stock repurchase plan authorized. No definition available.
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Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The net carrying amount of the consolidated Variable Interest Entity's assets and liabilities included in the reporting entity's statement of financial position. No definition available.
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