v3.6.0.2
Restructuring Charges - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]        
Employee severance costs included in restructuring liabilities   $ 52 $ 239  
Employee severance costs $ 216      
Other exit costs 23      
Total restructuring liabilities 240 151 240 $ 40
Restructuring liabilities - current 197 129 197  
Restructuring liabilities - non current $ 43 22 $ 43  
Personnel Lay-Off Costs [Member]        
Restructuring Cost and Reserve [Line Items]        
Employee severance costs included in restructuring liabilities   $ 52