Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Taxes [Line Items]
Effective income tax rate	31.30%	29.30%	29.20%	26.50%
Increase/(decrease) in effective tax rate due to impact of discrete tax items	0.20%	4.40%	0.10%	7.60%
Net increase to income tax reserves for unrecognized tax benefits based on tax positions related to current and prior years			$ 4
Unrecognized tax benefits reserve that would impact effective tax rate if released into income	$ 50		50
Current Tax Payable Within Other Current Liabilities
Income Taxes [Line Items]
Unrecognized tax benefits reserve that would impact effective tax rate if released into income	6		6
Non-Current Tax Payable Within Other Non-current Liabilities
Income Taxes [Line Items]
Unrecognized tax benefits reserve that would impact effective tax rate if released into income	$ 44		$ 44