Annual report pursuant to Section 13 and 15(d)

Equity - Additional Information (Detail)

v3.3.1.900
Equity - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Aug. 07, 2015
Sep. 30, 2015
Dec. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Equity [Line Items]            
Minimum number of shares that can be exchanged by exchangeable shareholders unless the number of remaining exchangeable shares registered in the name of the holder is less       50,000    
Number of shares of Common stock received for each exchangeable share       1    
Common stock, shares outstanding     152,907,166 152,907,166 210,819,790  
Value of treasury stock acquired, cost method       $ 1,456,361,000 $ 93,482,000  
Payments for repurchase of common stock       1,606,361,000 93,482,000  
Amount in APIC paid in ASR for shares not received       150,000,000    
Income attributable to the other joint venture members       10,900,000 18,400,000 $ 19,400,000
Carrying value of the investments held by Quanta in variable interest entities     $ 2,321,000 2,321,000 11,067,000  
Non-controlling interests     $ 2,321,000 2,321,000 11,067,000  
Distributions to non-controlling interests       21,228,000 $ 14,432,000 $ 17,625,000
Contributions received from a joint venture partner       2,313,000    
Corporate Joint Venture [Member]            
Equity [Line Items]            
Contributions received from a joint venture partner       $ 2,313,000    
2015 Repurchase Plan Open Market Purchases [Member]            
Equity [Line Items]            
Treasury stock acquired     19,200,000      
Value of treasury stock acquired, cost method     $ 449,900,000      
2013 Repurchase Program [Member]            
Equity [Line Items]            
Treasury stock acquired       14,400,000 3,000,000  
Value of treasury stock acquired, cost method       $ 406,500,000 $ 93,500,000  
2013 Repurchase Program [Member] | Maximum [Member]            
Equity [Line Items]            
Aggregate authorized amount of common stock to be repurchased     $ 500,000,000 $ 500,000,000    
2015 Repurchase Program [Member] | Maximum [Member]            
Equity [Line Items]            
Aggregate authorized amount of common stock to be repurchased   $ 1,250,000,000        
Accelerated Share Repurchase Agreement [Member]            
Equity [Line Items]            
Treasury stock acquired 25,700,000          
Value of treasury stock acquired, cost method   600,000,000        
Aggregate authorized amount of common stock to be repurchased $ 750,000,000          
Payments for repurchase of common stock $ 750,000,000          
Amount in APIC paid in ASR for shares not received   $ 150,000,000        
2013 and 2015 Repurchase Program [Member]            
Equity [Line Items]            
Treasury stock acquired       59,300,000    
Value of treasury stock acquired, cost method       $ 1,460,000,000    
Common Stock [Member]            
Equity [Line Items]            
Exchangeable shares exchanged for common stock       449,929   409,110
Treasury stock acquired       59,251,407 2,996,278  
Treasury Stock [Member]            
Equity [Line Items]            
Value of treasury stock acquired, cost method       $ 1,456,361,000 $ 93,482,000  
Series F Preferred Stock [Member]            
Equity [Line Items]            
Number of preferred Stock issued to voting trust     1 1 1  
Series G Preferred Stock [Member]            
Equity [Line Items]            
Number of preferred Stock issued to voting trust     1 1 1  
Exchangeable Shares [Member]            
Equity [Line Items]            
Common stock, shares outstanding     6,876,042 6,876,042 7,325,971  
Exchangeable shares exchanged for common stock       (449,929)   (409,110)
Series F- and Series G- Preferred Stock [Member]            
Equity [Line Items]            
Exchangeable stock shares outstanding     3,949,929 3,949,929    
Common Stock Withheld for Settlement of Employee Tax Liabilities [Member] | Treasury Stock [Member]            
Equity [Line Items]            
Treasury stock acquired       365,070 352,558 379,566
Value of treasury stock acquired, cost method       $ 10,400,000 $ 12,300,000 $ 12,100,000