Segment Information - Schedule of Segment Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Net Sales	$ 826,629	$ 809,508
Cost of sales	418,533	420,638
Gross profit	408,096	388,870
Advertising and promotion expenses	70,198	71,441
Other selling and administrative expenses	390,878	352,947
Operating Income (Loss)	(52,980)	(35,518)
Interest expense	29,234	30,059
Interest (income)	(15,952)	(17,282)
Other non-operating expense, net	13,040	5,613
Loss Before Income Taxes	(79,302)	(53,908)
Incentive compensation	166,016	155,228	$ 157,699
Share-based compensation	19,904	17,929
Operating Segments
Segment Reporting Information [Line Items]
Net Sales	826,629	809,508
Cost of sales	431,815	441,224
Gross profit	394,814	368,284
Advertising and promotion expenses	70,198	71,441
Other selling and administrative expenses	218,225	214,582
Operating Income (Loss)	106,391	82,261
Operating Segments \| North America
Segment Reporting Information [Line Items]
Net Sales	491,365	477,786
Cost of sales	256,293	257,144
Gross profit	235,072	220,642
Advertising and promotion expenses	38,586	34,715
Other selling and administrative expenses	113,415	112,936
Operating Income (Loss)	83,071	72,991
Operating Segments \| International
Segment Reporting Information [Line Items]
Net Sales	335,264	331,722
Cost of sales	175,522	184,080
Gross profit	159,742	147,642
Advertising and promotion expenses	31,612	36,726
Other selling and administrative expenses	104,810	101,646
Operating Income (Loss)	23,320	9,270
Corporate and other
Segment Reporting Information [Line Items]
Net Sales	0	0
Cost of sales	(13,282)	(20,586)
Gross profit	13,282	20,586
Advertising and promotion expenses	0	0
Other selling and administrative expenses	172,653	138,365
Operating Income (Loss)	(159,371)	(117,779)
Interest expense	29,234	30,059
Interest (income)	(15,952)	(17,282)
Other non-operating expense, net	13,040	5,613
Expenses related to inclined sleeper recall litigation	14,000	4,000
Incentive compensation	24,000	26,000
Share-based compensation	$ 20,000	$ 18,000
Corporate and other \| Cost of sales
Segment Reporting Information [Line Items]
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of sales	Cost of sales
Restructuring charges	$ 2,000	$ 2,000
Corporate and other \| Other selling and administrative expenses
Segment Reporting Information [Line Items]
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other selling and administrative expenses	Other selling and administrative expenses
Restructuring charges	$ 21,000	$ 6,000

MATTEL INC /DE/ 10-Q