Intangible assets excluding goodwill - Expected useful lives of intangible assets excluding goodwill (Detail)	12 Months Ended
	Dec. 31, 2025
Brand names \| Bottom of range
Intangible assets excluding goodwill [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	2 years
Brand names \| Top of range
Intangible assets excluding goodwill [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	20 years
Customer relationships \| Bottom of range
Intangible assets excluding goodwill [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	2 years
Customer relationships \| Top of range
Intangible assets excluding goodwill [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	25 years
Technology \| Bottom of range
Intangible assets excluding goodwill [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	3 years
Technology \| Top of range
Intangible assets excluding goodwill [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	20 years
Other \| Bottom of range
Intangible assets excluding goodwill [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	1 year
Other \| Top of range
Intangible assets excluding goodwill [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	10 years
Software \| Bottom of range
Intangible assets excluding goodwill [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	1 year
Software \| Top of range
Intangible assets excluding goodwill [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	10 years
Product development \| Bottom of range
Intangible assets excluding goodwill [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	3 years
Product development \| Top of range
Intangible assets excluding goodwill [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	10 years