Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2026

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Benefit Cost (Credit)

The components of Mattel's net periodic benefit cost for defined benefit pension plans were as follows:

	For the Three Months Ended
	March 31, 2026		March 31, 2025
	(In thousands)
Service cost	$	925	$	830
Interest cost	4,715		5,080
Expected return on plan assets	(3,629)		(4,369)
Amortization of prior service cost	50		49
Recognized actuarial loss	2,119		2,165
Net periodic benefit cost	$	4,180	$	3,755

The components of Mattel's net periodic benefit credit for postretirement benefit plans were as follows:

	For the Three Months Ended
	March 31, 2026		March 31, 2025
	(In thousands)
Interest cost	$	26	$	36
Amortization of prior service credit	—		(499)
Recognized actuarial gain	(78)		(73)
Net periodic benefit credit	$	(52)	$	(536)