XML 96 R83.htm IDEA: XBRL DOCUMENT v3.3.1.900

Commitments and Contingencies - Outstanding Capital Commitments Associated with Investments in Unconsolidated Affiliates (Parenthetical) (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Corporate Joint Venture [Member]
Other Commitments [Line Items]
Return of capital from unconsolidated affiliates anticipated for 2017	$ 40.9

X

- Definition

Forecasted returns of capital from unconsolidated affiliates in two years.

+ References

No definition available.

+ Details

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

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

X

- Details

Name:	dei_LegalEntityAxis=us-gaap_CorporateJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: