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

The pro forma gross profit for a period as if the business combination or combinations had been completed at the beginning of the period.

No definition available.

Name:	pwr_BusinessAcquisitionsProFormaGrossProfit
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The pro forma net income(loss) attributable to common stock for a period as if the business combination or combinations had been completed at the beginning of the period.

No definition available.

Name:	pwr_BusinessAcquisitionsProFormaNetIncomeLossAttributableToCommonStock
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The pro forma selling, general and administrative expenses for a period as if the business combination or combinations had been completed at the beginning of the period.

No definition available.

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

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

Name:	us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.