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Debt Obligations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013
Line of Credit Facility [Line Items] |
Letters of credit issued under the credit facility | $ 240.3
Amount borrowed under the credit facility | 0
Credit facility available for revolving loans or issuing new letters of credit | 1,080
Prior Credit Facility [Member] |
Line of Credit Facility [Line Items] |
Senior secured revolving credit facility | 475.0
Maturity date of senior secured revolving credit facility | Sep. 19, 2012
Base rate in excess of Federal Funds Rate | 0.50%
Prior Credit Facility [Member] | Minimum [Member] |
Line of Credit Facility [Line Items] |
Commitment fee | 0.15%
Letter of credit fee | 0.875%
Interest rate in excess of euro dollar rate | 0.875%
Interest rate in excess of base rate | 0.00%
Prior Credit Facility [Member] | Maximum [Member] |
Line of Credit Facility [Line Items] |
Commitment fee | 0.35%
Letter of credit fee | 1.75%
Interest rate in excess of euro dollar rate | 1.75%
Interest rate in excess of base rate | 0.75%
United States Dollar [Member] |
Line of Credit Facility [Line Items] |
Letters of credit issued under the credit facility | 184.2
Canada And Australia Dollar [Member] |
Line of Credit Facility [Line Items] |
Letters of credit issued under the credit facility | 56.1
First Amendment [Member] |
Line of Credit Facility [Line Items] |
Senior secured revolving credit facility | 700.0
Maturity date of senior secured revolving credit facility | Aug. 02, 2016
Reduction in Quanta's maximum funded debt and maximum senior debt by all cash and cash equivalents in excess of amount | 25.0
Base rate in excess of Federal Funds Rate | 0.50%
One possible rate is this rate in excess of Eurocurrency Rate | 1.00%
First Amendment [Member] | Minimum [Member] |
Line of Credit Facility [Line Items] |
Commitment fee | 0.20%
Letter of credit fee | 1.25%
Interest rate in excess of Eurocurrency rate applicable to domestic borrowings only | 1.25%
Interest rate in excess of base rate, domestic borrowings only | 0.25%
Interest rate of credit agreement for foreign borrowings | 1.25%
First Amendment [Member] | Maximum [Member] |
Line of Credit Facility [Line Items] |
Commitment fee | 0.45%
Letter of credit fee | 2.50%
Interest rate in excess of Eurocurrency rate applicable to domestic borrowings only | 2.50%
Interest rate in excess of base rate, domestic borrowings only | 1.50%
Interest rate of credit agreement for foreign borrowings | 2.50%
First Amendment [Member] | Performance Letter of Credit [Member] | Minimum [Member] |
Line of Credit Facility [Line Items] |
Letter of credit fee | 0.75%
First Amendment [Member] | Performance Letter of Credit [Member] | Maximum [Member] |
Line of Credit Facility [Line Items] |
Letter of credit fee | 1.50%
Second Amendment [Member] |
Line of Credit Facility [Line Items] |
Reduction in Quanta's maximum funded debt and maximum senior debt by all cash and cash equivalents in excess of amount | 25.0
Base rate in excess of Federal Funds Rate | 0.50%
One possible rate is this rate in excess of Eurocurrency Rate | 1.00%
Percentage of capital stock of direct foreign subsidiaries required to secure credit agreement | 65.00%
Amount of availability under the credit agreement and/or cash and cash equivalents on hand that must be present to allow for cash payments of dividends and stock repurchases | 100
Cross default provisions with debt instruments exceeding this amount | 75.0
Second Amendment [Member] | Prior to April 1, 2014 [Member] |
Line of Credit Facility [Line Items] |
Senior secured revolving credit facility | 1,325.0
Maturity date of senior secured revolving credit facility | Oct. 30, 2018
Option to increase revolving commitments under the credit agreement | 300.0
Commitment fee | 0.20%
Letter of credit fee | 1.25%
Interest rate in excess of Eurocurrency rate applicable to domestic borrowings only | 1.25%
Interest rate in excess of base rate, domestic borrowings only | 0.25%
Interest rate of credit agreement for foreign borrowings | 1.25%
Second Amendment [Member] | Prior to April 1, 2014 [Member] | Performance Letters Of Credit [Member] |
Line of Credit Facility [Line Items] |
Letter of credit fee | 0.75%
Second Amendment [Member] | Prior to April 1, 2014 [Member] | U S Dollar [Member] | Swing Line Loans [Member] |
Line of Credit Facility [Line Items] |
Senior secured revolving credit facility | 50.0
Second Amendment [Member] | Prior to April 1, 2014 [Member] | Canadian Dollars [Member] | Swing Line Loans [Member] |
Line of Credit Facility [Line Items] |
Senior secured revolving credit facility | 30.0
Second Amendment [Member] | Prior to April 1, 2014 [Member] | Australian Dollars [Member] | Swing Line Loans [Member] |
Line of Credit Facility [Line Items] |
Senior secured revolving credit facility | 20.0
Second Amendment [Member] | Prior to April 1, 2014 [Member] | Revolving Loans and Letter of Credit in Alternative Currencies [Member] |
Line of Credit Facility [Line Items] |
Senior secured revolving credit facility | $ 400.0
Second Amendment [Member] | Effective April 1, 2014 [Member] | Minimum [Member] |
Line of Credit Facility [Line Items] |
Commitment fee | 0.20%
Letter of credit fee | 1.125%
Interest rate in excess of Eurocurrency rate applicable to domestic borrowings only | 1.125%
Interest rate in excess of base rate, domestic borrowings only | 0.125%
Interest rate of credit agreement for foreign borrowings | 1.125%
Second Amendment [Member] | Effective April 1, 2014 [Member] | Maximum [Member] |
Line of Credit Facility [Line Items] |
Commitment fee | 0.40%
Letter of credit fee | 2.125%
Interest rate in excess of Eurocurrency rate applicable to domestic borrowings only | 2.125%
Interest rate in excess of base rate, domestic borrowings only | 1.125%
Interest rate of credit agreement for foreign borrowings | 2.125%
Second Amendment [Member] | Effective April 1, 2014 [Member] | Performance Letters Of Credit [Member] | Minimum [Member] |
Line of Credit Facility [Line Items] |
Letter of credit fee | 0.675%
Second Amendment [Member] | Effective April 1, 2014 [Member] | Performance Letters Of Credit [Member] | Maximum [Member] |
Line of Credit Facility [Line Items] |
Letter of credit fee | 1.275%

X
- Definition Amount of availability under the credit agreement and/or cash and cash equivalents on hand that must be present to allow for cash payments of dividends and stock repurchases. + References No definition available. + Details
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X
- Definition Cross-default provisions. + References No definition available. + Details
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- Definition Letter of credit fee. + References No definition available. + Details
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- Definition Option To Increase Revolving Commitments Under Credit Agreement + References No definition available. + Details
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Balance Type: | credit
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- Definition Percentage of capital stock of direct foreign subsidiaries required to secure credit agreement. + References No definition available. + Details
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- Definition Reduction in Quanta's maximum funded debt and maximum senior debt by all cash and cash equivalents in excess of amount. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | instant

X
- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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