Business Segment Information - People's Republic of China, including Hong Kong - Geographic Concentration Risk (Detail) - Peoples Republic Of China Including Hong Kong - Geographic Concentration Risk	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues
Concentration Risk [Line Items]
Concentration percentage	22.00%	18.00%	27.00%
Operating Income
Concentration Risk [Line Items]
Concentration percentage	17.00%	17.00%	19.00%
Identifiable assets at year end
Concentration Risk [Line Items]
Concentration percentage	10.00%	8.00%	10.00%
Equity
Concentration Risk [Line Items]
Concentration percentage	9.00%	5.00%	7.00%