Quarterly report pursuant to Section 13 or 15(d)

Debt Obligations - Additional Information (Detail)

v2.4.0.8
Debt Obligations - Additional Information (Detail) (USD $)
6 Months Ended 10 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
U S Dollar [Member]
Jun. 30, 2014
Canada And Australia Dollar [Member]
Jun. 30, 2014
Second Amendment [Member]
Oct. 30, 2013
First Amendment [Member]
Oct. 30, 2013
Minimum [Member]
First Amendment [Member]
Oct. 30, 2013
Maximum [Member]
First Amendment [Member]
Jun. 30, 2014
Prior and After April 1, 2014 [Member]
Second Amendment [Member]
Jun. 30, 2014
Prior to April 1, 2014 [Member]
Second Amendment [Member]
Jun. 30, 2014
Prior to April 1, 2014 [Member]
Performance Letters Of Credit [Member]
Second Amendment [Member]
Jun. 30, 2014
Effective April 1, 2014 [Member]
Minimum [Member]
Second Amendment [Member]
Jun. 30, 2014
Effective April 1, 2014 [Member]
Maximum [Member]
Second Amendment [Member]
Jun. 30, 2014
Effective April 1, 2014 [Member]
Performance Letters Of Credit [Member]
Minimum [Member]
Second Amendment [Member]
Jun. 30, 2014
Effective April 1, 2014 [Member]
Performance Letters Of Credit [Member]
Maximum [Member]
Second Amendment [Member]
Jun. 30, 2014
Swing Line Loans [Member]
Prior and After April 1, 2014 [Member]
Second Amendment [Member]
U S Dollar [Member]
Jun. 30, 2014
Swing Line Loans [Member]
Prior and After April 1, 2014 [Member]
Second Amendment [Member]
Canadian Dollars [Member]
Jun. 30, 2014
Swing Line Loans [Member]
Prior and After April 1, 2014 [Member]
Second Amendment [Member]
Australian Dollars [Member]
Jun. 30, 2014
Revolving Loans and Letter of Credit in Alternative Currencies [Member]
Prior and After April 1, 2014 [Member]
Second Amendment [Member]
Oct. 30, 2013
Performance Letter of Credit [Member]
Minimum [Member]
First Amendment [Member]
Oct. 30, 2013
Performance Letter of Credit [Member]
Maximum [Member]
First Amendment [Member]
Line of Credit Facility [Line Items]                                          
Senior secured revolving credit facility           $ 700,000,000     $ 1,325,000,000             $ 50,000,000 $ 30,000,000 $ 20,000,000 $ 400,000,000    
Maturity date of senior secured revolving credit facility           Aug. 02, 2016     Oct. 30, 2018                        
Option to increase revolving commitments under the credit agreement                 300,000,000                        
Letters of credit issued under the credit facility 243,800,000   215,500,000 28,300,000                                  
Amount borrowed under the credit facility 0 0                                      
Credit facility available for revolving loans or issuing new letters of credit 1,080,000,000                                        
Commitment fee             0.20% 0.45%   0.20%   0.20% 0.40%                
Letter of credit fee             1.25% 2.50%   1.25% 0.75% 1.125% 2.125% 0.675% 1.275%         0.75% 1.50%
Interest rate in excess of Eurocurrency rate applicable to domestic borrowings only             1.25% 2.50%   1.25%   1.125% 2.125%                
Interest rate in excess of base rate, domestic borrowings only             0.25% 1.50%   0.25%   0.125% 1.125%                
Interest rate in excess of Eurocurrency rate of credit agreement for foreign borrowings             1.25% 2.50%   1.25%   1.125% 2.125%                
Reduction in Quanta's maximum funded debt and maximum senior debt by all cash and cash equivalents in excess of amount         25,000,000 25,000,000                              
Base rate in excess of Federal Funds Rate         0.50% 0.50%                              
One possible rate is this rate in excess of Eurocurrency Rate         1.00% 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         100,000,000                                
Cross default provisions with debt instruments exceeding this amount         $ 75,000,000