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Debt Obligations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2013
Line of Credit Facility [Line Items] |
Senior secured revolving credit facility | $ 700.0
Maturity date of senior secured revolving credit facility | Aug. 02, 2016
Letters of credit issued under the credit facility | 183.6
Amount borrowed under the credit facility | 0
Credit facility available for revolving loans or issuing new letters of credit | 516.4
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 the Eurocurrency Rate | 1.00%
Percentage of capital stock of direct foreign subsidiaries required to secure credit agreement | 65.00%
Cross default provisions with debt instruments exceeding this amount | 30.0
Revolving Loans and Letter of Credit in Alternative Currencies [Member] |
Line of Credit Facility [Line Items] |
Senior secured revolving credit facility | $ 100.0
Minimum [Member] |
Line of Credit Facility [Line Items] |
Interest rate in excess of Eurocurrency rate applicable to domestic borrowings only, plus Mandatory Cost | 1.25%
Interest rate in excess of Base Rate, domestic borrowings only | 0.25%
Interest rate of credit agreement for foreign borrowings, plus mandatory costs | 1.25%
Letter of credit fee | 1.25%
Commitment fee | 0.20%
Minimum [Member] | Performance Letter Of Credit [Member] |
Line of Credit Facility [Line Items] |
Letter of credit fee | 0.75%
Maximum [Member] |
Line of Credit Facility [Line Items] |
Interest rate in excess of Eurocurrency rate applicable to domestic borrowings only, plus Mandatory Cost | 2.50%
Interest rate in excess of Base Rate, domestic borrowings only | 1.50%
Interest rate of credit agreement for foreign borrowings, plus mandatory costs | 2.50%
Letter of credit fee | 2.50%
Commitment fee | 0.45%
Maximum [Member] | Performance Letter Of Credit [Member] |
Line of Credit Facility [Line Items] |
Letter of credit fee | 1.50%

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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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- 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 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 Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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 3: 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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