Segment Information - Worldwide Revenues by Top 3 Power Brands (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 594,069	$ 689,246
Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	669,965	780,126
Operating Segments | Barbie
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	147,485	163,478
Operating Segments | Hot Wheels
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	158,618	150,536
Operating Segments | Fisher-Price and Thomas & Friends
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	128,750	172,398
Operating Segments | Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	235,112	293,714
Sales adjustments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ (75,896)	$ (90,880)