Reconciliation between Federal Statutory Rate and Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	21.00%	21.00%
State taxes, net of federal income tax benefit	2.30%	2.40%	2.40%
Tax effects of foreign operations	(0.50%)	(0.70%)	(0.30%)
Tax benefit from settlement of employee equity awards	(0.80%)	0.40%	0.10%
Other items	0.70%	0.40%	0.50%
Impact of income attributable to noncontrolling interests	(0.30%)	0.00%	0.50%
Effective tax rate	22.40%	23.50%	24.20%