Name:	pwr_OperatingLeasesFutureMinimumPaymentsDueAfterFourthFullYearForInterimPeriodsOrAfterFiveFullYearsForYearEndReportingPeriods
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the first full year of the balance sheet date relating to leases defined as operating.

No definition available.

Name:	pwr_OperatingLeasesFutureMinimumPaymentsDueInFirstFullYear
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fourth full year of the balance sheet date relating to leases defined as operating.

No definition available.

Name:	pwr_OperatingLeasesFutureMinimumPaymentsDueInFourthFullYear
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the second full year of the balance sheet date relating to leases defined as operating.

No definition available.

Name:	pwr_OperatingLeasesFutureMinimumPaymentsDueInSecondFullYear
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the third full year of the balance sheet date relating to leases defined as operating.

No definition available.

Name:	pwr_OperatingLeasesFutureMinimumPaymentsDueInThirdFullYear
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due in the remainder of the current year relating to leases defined as operating.

No definition available.

Name:	pwr_OperatingLeasesFutureMinimumPaymentsDueRemainderOfCurrentYear
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The total of future contractually required payments on leases defined as operating.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 122

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 16

-Subparagraph b(i)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717