Consolidated Interest Coverage Ratio

No definition available.

Name:	has_DebtInstrumentCovenantComplianceConsolidatedInterestCoverageRatio
Namespace Prefix:	has_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Consolidated Total Leverage Ratio

+ References

No definition available.

+ Details

Name:	has_DebtInstrumentCovenantComplianceConsolidatedTotalLeverageRatio
Namespace Prefix:	has_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Production Financing Loan, Weighted Average Interest Rate

+ References

No definition available.

+ Details

Name:	has_ProductionFinancingLoanWeightedAverageInterestRate
Namespace Prefix:	has_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentInterestRateIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

+ Details

Name:	us-gaap_DeferredFinanceCostsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

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

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=has_SeniorUnsecuredNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=has_Notes2.60Due2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=has_Notes3.00Due2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=has_Notes3.55Due2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=has_Notes3.90Due2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=has_Notes3.50Due2027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=has_Notes315Due2021MemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=has_TermLoanAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=has_ThreeYearTermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=has_FiveYearTermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_EurodollarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Financial Instruments - Narrative (Details) - USD ($)	1 Months Ended		3 Months Ended
Financial Instruments - Narrative (Details) - USD ($)	Nov. 30, 2019	Sep. 30, 2019	Jun. 28, 2020	Dec. 30, 2019	Dec. 29, 2019	Jun. 30, 2019
Debt Instrument [Line Items]
Current portion of long-term debt			$ 378,558,000		$ 0	$ 0
Production financing loan, weighted average interest rate			3.60%
Minimum
Debt Instrument [Line Items]
Term of loan facility	3 years
Senior Unsecured Notes \| Minimum
Debt Instrument [Line Items]
Upward adjustment if credit rating is reduced (as a percent)	0.25%
Senior Unsecured Notes \| Maximum
Debt Instrument [Line Items]
Term of loan facility	10 years
Upward adjustment if credit rating is reduced (as a percent)	2.00%
Senior Notes \| Senior Unsecured Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 2,375,000,000			$ 2,375,000,000
Underwriting discount and fees	20,043,000
Net proceeds after deduction of underwriting discount and fees	2,354,957,000
Senior Notes \| 2.60% Notes Due 2022
Debt Instrument [Line Items]
Aggregate principal amount	$ 300,000,000
Interest rate	2.60%
Effective interest rate	0.15%
Senior Notes \| 3.00% Notes Due 2024
Debt Instrument [Line Items]
Aggregate principal amount	$ 500,000,000
Interest rate	3.00%
Effective interest rate	0.25%
Senior Notes \| 3.55% Notes Due 2026
Debt Instrument [Line Items]
Aggregate principal amount	$ 675,000,000
Interest rate	3.55%
Effective interest rate	0.30%
Senior Notes \| 3.90% Notes Due 2029
Debt Instrument [Line Items]
Aggregate principal amount	$ 900,000,000
Interest rate	3.90%
Effective interest rate	0.35%
3.50% Notes Due 2027
Debt Instrument [Line Items]
Interest rate			3.50%
Redemption price (as a percent)	100.00%
3.15% Notes Due 2021
Debt Instrument [Line Items]
Aggregate principal amount	$ 300,000
Interest rate			3.15%
Unsecured Debt \| Term Loan Agreement
Debt Instrument [Line Items]
Aggregate principal amount		$ 1,000,000,000.0
Consolidated interest coverage ratio		3.00
Consolidated total leverage ratio		3.50
Repayments of unsecured debt			$ 7,500,000
Unsecured Debt \| Term Loan Agreement \| Minimum
Debt Instrument [Line Items]
Consolidated total leverage ratio		5.40
Unsecured Debt \| Term Loan Agreement \| Maximum
Debt Instrument [Line Items]
Consolidated total leverage ratio		5.65
Unsecured Debt \| Three-Year Term Loan Facility
Debt Instrument [Line Items]
Aggregate principal amount		$ 400,000,000
Term of loan facility		3 years
Unsecured Debt \| Five-Year Term Loan Facility
Debt Instrument [Line Items]
Aggregate principal amount		$ 600,000,000
Term of loan facility		5 years
Unsecured Debt \| Five-Year Term Loan Facility \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Interest rate		5.00%
Term of loan facility		2 years
Unsecured Debt \| Five-Year Term Loan Facility \| Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Interest rate		10.00%
Eurocurrency Rate \| Unsecured Debt \| Three-Year Term Loan Facility \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		0.875%
Eurocurrency Rate \| Unsecured Debt \| Three-Year Term Loan Facility \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		1.75%
Eurocurrency Rate \| Unsecured Debt \| Five-Year Term Loan Facility \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		1.00%
Eurocurrency Rate \| Unsecured Debt \| Five-Year Term Loan Facility \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		1.875%
Base Rate \| Unsecured Debt \| Three-Year Term Loan Facility \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		0.00%
Base Rate \| Unsecured Debt \| Three-Year Term Loan Facility \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		0.75%
Base Rate \| Unsecured Debt \| Five-Year Term Loan Facility \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		0.00%
Base Rate \| Unsecured Debt \| Five-Year Term Loan Facility \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		0.875%