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Commitments and Contingencies (Details) $ in Millions | 12 Months Ended
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Dec. 29, 2018 USD ($) lease_commitment
Purchase Commitment, Excluding Long-term Commitment [Line Items] |
Inventory Purchase Commitments | $ 32
Purchase Commitment | Future Retail Sites |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |
Number of future retail store lease commitments | lease_commitment | 46
Future retail store leases, Rent Expense, Minimum Rentals | $ 62
Minimum | Purchase Commitment | Future Retail Sites |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |
Future retail store lease commitments term | 5 years
Maximum | Purchase Commitment | Future Retail Sites |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |
Future retail store lease commitments term | 10 years

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- Definition For a group or grouping of new lease commitments within the period, the duration term of maximum of future rent payments. + References No definition available. + Details
Name: | snbr_NewLeaseCommitmentsTerm
Namespace Prefix: | snbr_
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Balance Type: | na
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- Definition The number of lease commitments the company has entered into for future retail store locations. + References No definition available. + Details
Name: | snbr_NumberOfLeaseCommitments
Namespace Prefix: | snbr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77910348&loc=d3e34039-112682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 + Details
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- 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
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- Definition Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(17)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(19)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 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(25)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Details
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- Details
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Balance Type: |
Period Type: |

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- Details
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- Details
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