Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2025

Equity [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Income (Loss)

The following tables present changes in the accumulated balances for each component of other comprehensive income (loss), including current period other comprehensive income (loss) and reclassifications from accumulated other comprehensive income (loss):

	For the Year Ended December 31, 2025
	Derivative Instruments		Employee Benefit Plans		Currency Translation Adjustments		Total
	(In thousands)
Accumulated Other Comprehensive Income (Loss), Net of Tax, as of December 31, 2024	$	14,307	$	(139,663)	$	(869,096)	$	(994,452)
Other comprehensive income (loss) before reclassifications	(49,196)		8,575		121,458		80,837
Amounts reclassified from accumulated other comprehensive income (loss)	18,173		4,876		—		23,049
Net change in other comprehensive income (loss)	(31,023)		13,451		121,458		103,886
Accumulated Other Comprehensive Income (Loss), Net of Tax, as of December 31, 2025	$	(16,716)	$	(126,212)	$	(747,638)	$	(890,566)
	For the Year Ended December 31, 2024
	Derivative Instruments		Employee Benefit Plans		Currency Translation Adjustments		Total
	(In thousands)
Accumulated Other Comprehensive Income (Loss), Net of Tax, as of December 31, 2023	$	(3,463)	$	(142,916)	$	(758,589)	$	(904,968)
Other comprehensive income (loss) before reclassifications	39,409		(819)		(110,507)		(71,917)
Amounts reclassified from accumulated other comprehensive income (loss)	(21,639)		4,072		—		(17,567)
Net change in other comprehensive income (loss)	17,770		3,253		(110,507)		(89,484)
Accumulated Other Comprehensive Income (Loss), Net of Tax, as of December 31, 2024	$	14,307	$	(139,663)	$	(869,096)	$	(994,452)
	For the Year Ended December 31, 2023
	Derivative Instruments		Employee Benefit Plans		Currency Translation Adjustments		Total
	(In thousands)
Accumulated Other Comprehensive Income (Loss), Net of Tax, as of December 31, 2022	$	22,732	$	(138,498)	$	(795,712)	$	(911,478)
Other comprehensive income (loss) before reclassifications	(15,903)		(6,558)		37,123		14,662
Amounts reclassified from accumulated other comprehensive income (loss)	(10,292)		2,140		—		(8,152)
Net change in other comprehensive income (loss)	(26,195)		(4,418)		37,123		6,510
Accumulated Other Comprehensive Income (Loss), Net of Tax, as of December 31, 2023	$	(3,463)	$	(142,916)	$	(758,589)	$	(904,968)

Schedule of Consolidated Statement of Operations Line Items Affected by Reclassifications from Accumulated Other Comprehensive Income (Loss)

The following table presents the classification and amount of the reclassifications from accumulated other comprehensive income (loss) to the consolidated statements of operations:

	For the Year Ended						Consolidated Statements of Operations Classification
	December 31, 2025		December 31, 2024		December 31, 2023
	(In thousands)
Derivative Instruments
(Loss) gain on foreign currency forward exchange and other contracts	$	(18,181)	$	21,590	$	9,880	Cost of sales
Tax effect	8		49		412		Provision/benefit for income taxes
	$	(18,173)	$	21,639	$	10,292	Net Income
Employee Benefit Plans
Amortization of prior service credit (a)	$	1,797	$	1,844	$	1,888	Other non-operating income/expense, net
Recognized actuarial (loss) (a)	(8,391)		(7,591)		(5,667)		Other non-operating income/expense, net
Curtailment gain (a)	121		—		—		Other non-operating income/expense, net
Settlement gain (a)	68		—		59		Other non-operating income/expense, net
	(6,405)		(5,747)		(3,720)
Tax effect	1,529		1,675		1,580		Provision/benefit for income taxes
	$	(4,876)	$	(4,072)	$	(2,140)	Net Income

(a)The amortization of prior service credit, recognized actuarial loss, curtailment gain, and settlement gain are included in the computation of net periodic benefit cost. Refer to "Note 4 to the Consolidated Financial Statements—Employee Benefit Plans" for additional information regarding Mattel's net periodic benefit cost.