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Segment Information - Worldwide Revenues by Brand Category (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 1,524,281	$ 1,437,451	$ 840,748	$ 708,372	$ 1,610,873	$ 1,560,983	$ 974,477	$ 735,618	$ 4,510,852	$ 4,881,951	$ 5,456,650
Barbie
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									1,088,953	954,892	971,795
Hot Wheels
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									834,058	777,341	796,969
Fisher-Price and Thomas & Friends
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									1,185,669	1,370,543	1,546,111
American Girl
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									342,442	473,302	592,118
Toy Box
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									1,624,408	1,938,047	2,166,722
Reconciling Adjustments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									$ (564,677)	$ (632,174)	$ (617,064)

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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