Goodwill and Identifiable Intangible Assets, Net - Narrative (Details)	3 Months Ended
	Mar. 31, 2026 USD ($) reporting_unit	Mar. 31, 2025 USD ($)
Goodwill [Line Items]
Number of reporting units | reporting_unit	1
Goodwill acquired during the period	$ 195,820,000
Impairment of amortizable intangible assets	0	$ 0
Mattel163 Limited
Goodwill [Line Items]
Goodwill acquired during the period	196,000,000
Finite-lived intangible assets acquired during the period	$ 161,000,000