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Employee Bargaining Agreements and Benefit Plans - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2019
USD ($)
Employees
Pension_Plan
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Number of temporary employees | Employees 200    
Expenses for defined contribution plan $ 13 $ 13 $ 12
Number of benefit plans, description The Company sponsors two defined benefit plans in the United Kingdom under which accrual of pension benefits have ceased. Plan member benefits that have previously been accrued are indexed in line with inflation during the period up to retirement in order to protect their purchasing power. 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 4,400    
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 2    
Defined benefit plan, expected future employer contributions, next fiscal year $ 1