Additional information about the entity or its reportable segments that may contribute to an understanding of the enterprise.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6374474&loc=d3e8352-108598

+ Details

Name:	us-gaap_AdditionalInformationAboutEntitysReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_ProductOrServiceAxis=has_ClassOfPrincipalProductFranchiseBrandsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=has_ClassOfPrincipalProductPartnerBrandsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=has_ClassOfPrincipalHasbroGamingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=has_GamingIncludingMagicTheGatheringAndMonopolyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=has_ClassOfPrincipalProductEmergingBrandsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=has_HasbroGamingToFranchiseBrandsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Segment Reporting, Revenue by Brand Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Revenue from External Customer [Line Items]
Net revenue	$ 904,458	$ 972,506	$ 1,620,799	$ 1,822,169
Franchise Brands [Member]
Revenue from External Customer [Line Items]
Net revenue	506,535	552,435	868,241	1,001,594
Partner Brands [Member]
Revenue from External Customer [Line Items]
Net revenue	208,005	230,015	408,597	442,977
Hasbro Gaming [Member]
Revenue from External Customer [Line Items]
Net revenue	134,275	133,872	239,502	269,639
Gaming including Magic the Gathering and Monopoly [Member]
Revenue from External Customer [Line Items]
Net revenue	312,773	273,261	$ 516,315	526,550
Segment Reporting, Additional Information about Entity's Reportable Segments			For the quarter and six months ended July 2, 2017, revenues of $6,717 and $25,132, respectively, were reclassified from Emerging Brands to Franchise Brands to conform to the presentation for the quarter and six months ended July 1, 2018. Hasbro's total gaming category, including all gaming net revenues, most notably MAGIC: THE GATHERING and MONOPOLY, totaled $312,773 and $516,315 for the quarter and six-months ended July 1, 2018, respectively. For the quarter and six-months ended July 2, 2017, total gaming net revenues were $273,261 and $526,550, respectively.
Emerging Brands [Member]
Revenue from External Customer [Line Items]
Net revenue	$ 55,643	56,184	$ 104,459	107,959
Emerging Brands to Franchise Brands [Member]
Revenue from External Customer [Line Items]
Net revenue		$ 6,717		$ 25,132