XML 85 R74.htm IDEA: XBRL DOCUMENT v3.4.0.3

Commitments and Contingencies (Performance Bonds and Parent Guarantees) - Additional Information (Detail) $ in Millions	Mar. 31, 2016 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Total amount of outstanding performance bonds	$ 2,700
Estimated cost to complete bonded projects	$ 710

X

- Definition

Estimated cost to complete bonded projects.

+ References

No definition available.

+ Details

Name:	pwr_EstimatedCostToCompleteBondedProjects
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Outstanding performance bonds amount.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration