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Employee Bargaining Agreements and Benefit Plans - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2015
USD ($)
Employees
Pension_Plan
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Number of temporary employees | Employees 300    
Expenses for defined contribution plan $ 14 $ 13 $ 14
Number of benefit plans, description The company sponsors two defined benefit plans in the UK which are frozen. The second defined benefit plan was acquired from the John MacLean & Sons Electrical acquisition in March 2015.    
Defined benefit plan, concentration risk, description the Company’s management believes that there are no significant concentrations of risk associated with plan assets.    
UK [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Number of defined benefit plan | Pension_Plan 2    
Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Number of employees | Employees 5,000    
Maximum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of employees collective bargaining agreement 1.00%    
Net periodic benefit cost $ 1 $ 1 $ 1
Defined benefit plan, expected future benefit payments in next twelve months 1    
Defined benefit plan, expected future benefit payments in year two 1    
Defined benefit plan, expected future benefit payments in year three 1    
Defined benefit plan, expected future benefit payments in year four 1    
Defined benefit plan, expected future benefit payments in year five 1    
Defined benefit plan, expected future benefit payments in year five and thereafter 3    
Defined benefit plan, expected to contribute in next fiscal year $ 1