XML 80 R70.htm IDEA: XBRL DOCUMENT v3.8.0.1

Commitments and Contingencies - Leases (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating Leases [Line Items]
Rent expense related to operating leases	$ 76.0	$ 65.0
Residual Value Guarantee
Operating Leases [Line Items]
Maximum guaranteed residual value	$ 634.6

X

- Definition

Operating Leases [Line Items]

+ References

No definition available.

+ Details

Name:	pwr_OperatingLeasesLineItems
Namespace Prefix:	pwr_
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

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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