Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plan, Employer Contribution, Cost	$ 7	$ 9	$ 9
Contributions	23	32	$ 33
Amortized from accumulated other comprehensive income into net periodic benefit cost	9
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets	307	276
Defined Benefit Plan, Accumulated Benefit Obligation	916	$ 811
Estimated future benefit payments, 2014	30
Estimated future benefit payments, 2015	31
Estimated future benefit payments, 2016	31
Estimated future benefit payments, 2017	32
Estimated future benefit payments, 2018	33
Estimated future benefit payments, 2019 to 2023	$ 184
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Long-term rate of return on plan assets	7.00%	7.00%	7.00%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 4
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Long-term rate of return on plan assets	3.80%	4.50%	4.50%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 5