Segment Information - Worldwide Revenues by Top 3 Power Brands (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 860,063	$ 840,748	$ 1,549,309	$ 1,549,120
Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	962,266	954,120	1,742,392	1,754,131
Operating Segments | Barbie
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	186,531	170,733	350,009	323,424
Operating Segments | Hot Wheels
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	175,199	167,306	325,735	312,246
Operating Segments | Fisher-Price and Thomas & Friends
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	222,409	236,176	394,807	423,971
Operating Segments | Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	378,127	379,905	671,841	694,490
Sales Adjustments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ (102,203)	$ (113,372)	$ (193,083)	$ (205,011)