XML 92 R80.htm IDEA: XBRL DOCUMENT v3.10.0.1

Commitments and Contingencies - Performance Bonds and Parent Guarantees (Detail) - Performance Bonds $ in Millions	Jun. 30, 2018 USD ($)
Guarantor Obligations [Line Items]
Total amount of outstanding performance bonds	$ 3,200
Estimate
Guarantor Obligations [Line Items]
Estimated cost to complete bonded projects	$ 864

X

- Definition

Estimated Costs To Complete Bonded Projects

+ References

No definition available.

+ Details

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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=us-gaap_PerformanceGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=pwr_EstimateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: