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: |