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Legal Proceedings - Additional Information (Detail) - 9 months ended Sep. 30, 2016
CAD in Millions
USD ($)
shares
CAD
Other Commitments [Line Items]    
Estimated aggregate amount of reasonably possible losses for legal proceedings $ 1,700,000,000  
Municipal Securities Matters. Amount of auction rate securities issued by claimants from 2001 through 2007 1,110,000,000  
Mortgage Related Matters [Member]    
Other Commitments [Line Items]    
Mortgage-Related Matters. Disgorgement and civil penalty amount related to settlement of SEC action 550,000,000  
Mortgage-Related Matters. Approximate amount of aggregate notional amount of mortgage-related securities sold to plaintiffs in active cases brought against the firm where plaintiffs are seeking rescission of such securities 1,500,000,000  
Mortgage-Related Matters. Face amount of securitizations claimed for repurchase 11,100,000,000  
Cobalt International Energy Securities Litigation [Member] | February 2012 Common Stock Offering [Member]    
Other Commitments [Line Items]    
Aggregate value of offering $ 1,670,000,000  
Number of shares underwritten by GS&Co. in connection with the offering | shares 14,430,000  
Aggregate offering price $ 465,000,000  
Cobalt International Energy Securities Litigation [Member] | December 2012 Convertible Notes Offering [Member]    
Other Commitments [Line Items]    
Aggregate value of offering 1,380,000,000  
Approximate principal amount of notes underwritten by GS&Co. 690,000,000  
Cobalt International Energy Securities Litigation [Member] | January 2013 Common Stock Offering [Member]    
Other Commitments [Line Items]    
Aggregate value of offering 1,000,000,000  
Cobalt International Energy Securities Litigation [Member] | May 2013 Common Stock Offering [Member]    
Other Commitments [Line Items]    
Aggregate value of offering 1,330,000,000  
Cobalt International Energy Securities Litigation [Member] | May 2014 Convertible Notes Offering [Member]    
Other Commitments [Line Items]    
Aggregate value of offering 1,300,000,000  
Approximate principal amount of notes underwritten by GS&Co. 508,000,000  
Cobalt International Energy Securities Litigation [Member] | February 2012, December 2012 and May 2014 Offerings [Member]    
Other Commitments [Line Items]    
Aggregate offering price 1,660,000,000  
Currencies - Related Litigation - Superior Court of Justice in Ontario, Canada [Member]    
Other Commitments [Line Items]    
Compensatory damages sought | CAD   CAD 1,000
Currencies - Related Litigation - Superior Court of Quebec, Canada [Member]    
Other Commitments [Line Items]    
Compensatory damages sought | CAD   100
Currencies - Related Litigation - Superior Court of Justice in Ontario, Canada And Superior Court of Quebec, Canada [Member]    
Other Commitments [Line Items]    
Punitive, exemplary and aggravated damages sought | CAD   CAD 50
Solazyme, Inc. Securities Litigation [Member] | Common Stock Offering [Member]    
Other Commitments [Line Items]    
Aggregate value of offering $ 63,000,000  
Number of shares underwritten by GS&Co. in connection with the offering | shares 3,450,000  
Solazyme, Inc. Securities Litigation [Member] | Convertible Senior Notes [Member]    
Other Commitments [Line Items]    
Approximate principal amount of notes underwritten by GS&Co. $ 150,000,000  
Principal amount of convertible senior notes 150,000,000  
Solazyme, Inc. Securities Litigation [Member] | Convertible Senior Notes And Common Stock Offering [Member]    
Other Commitments [Line Items]    
Aggregate offering price 187,000,000  
GT Advanced Technologies Securities Litigation [Member] | Common Stock Offering [Member]    
Other Commitments [Line Items]    
Aggregate value of offering $ 86,000,000  
Number of shares underwritten by GS&Co. in connection with the offering | shares 3,479,769  
GT Advanced Technologies Securities Litigation [Member] | Convertible Senior Notes [Member]    
Other Commitments [Line Items]    
Approximate principal amount of notes underwritten by GS&Co. $ 75,000,000  
Principal amount of convertible senior notes 214,000,000  
GT Advanced Technologies Securities Litigation [Member] | Convertible Senior Notes And Common Stock Offering [Member]    
Other Commitments [Line Items]    
Aggregate offering price 105,000,000  
Fire Eye Securities Litigation [Member] | Common Stock Offering [Member]    
Other Commitments [Line Items]    
Aggregate value of offering $ 1,150,000,000  
Number of shares underwritten by GS&Co. in connection with the offering | shares 2,100,000  
Aggregate offering price $ 172,000,000  
SunEdison Securities Litigation [Member] | Convertible Preferred Stock Offering [Member]    
Other Commitments [Line Items]    
Aggregate value of offering $ 650,000,000  
Number of shares underwritten by GS&Co. in connection with the offering | shares 138,890  
Aggregate offering price $ 139,000,000  
TerraForm Global Securities Litigation [Member] | Common Stock Offering [Member]    
Other Commitments [Line Items]    
Aggregate value of offering $ 675,000,000  
Number of shares underwritten by GS&Co. in connection with the offering | shares 2,340,000  
Aggregate offering price $ 35,000,000  
TerraForm Global Securities Litigation [Member] | Class D Units [Member]    
Other Commitments [Line Items]    
Aggregate value of offering 335,000,000  
Aggregate offering price $ 155,000,000  
Number of units sold by TerraForm to the individual plaintiffs | shares 154,800  
TerraForm Global Securities Litigation [Member] | Senior Notes Offering [Member]    
Other Commitments [Line Items]    
Aggregate principal amount of notes $ 810,000,000  
Approximate principal amount of notes sold by GS&Co. 49,000,000  
Libya Related Litigation [Member] | Minimum [Member]    
Other Commitments [Line Items]    
Libya-Related Litigation. Contingent damages related to Libya amount in relation to derivative transactions $ 1,000,000,000