Debt instrument covenant interest coverage ratio.

No definition available.

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Period Type:	duration

- Definition

Debt instrument covenant leverage ratio.

+ References

No definition available.

+ Details

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- Definition

Debt instrument fixed portion of outstanding debt percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	sfm_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility Commitment Fee Percentage Subject to Upward or Downward Adjustments.

+ References

No definition available.

+ Details

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- Definition

Line of credit facility issuance fee percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	sfm_
Data Type:	dtr-types:percentItemType
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- Definition

Long-term debt and finance lease liabilities line items.

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
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- Definition

Date the credit facility terminates, in YYYY-MM-DD format.

+ References

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of interest rate for borrowing under credit facility. Includes, but is not limited to, terms and method for determining interest rate.

+ References

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the required periodic payment applied to principal.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
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-Subparagraph (SX 210.4-08(f))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

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Balance Type:	debit
Period Type:	duration

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

+ Details

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Long-Term Debt and Finance Lease Liabilities - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Jul. 03, 2022	Jul. 03, 2022	Mar. 25, 2022	Mar. 27, 2018
Credit Agreement [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Fixed portion of outstanding debt percentage		100.00%
Participation fee		1.00%
Issuance fee		0.125%
Credit facility termination date		Mar. 25, 2027
Borrowings during the period	$ 0	$ 0
Principal payments on the Credit Facility	0	0
Borrowings under credit facilities	250,000,000.0	$ 250,000,000.0
Net leverage ratio		375.00%
Interest coverage ratio		3.00%
Secured Debt [Member] \| Credit Agreement [Member] \| SOFR [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Fixed portion of outstanding debt percentage		0.10%
Secured Debt [Member] \| Current Credit Facility Agreement [Member] \| SOFR [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Interest rate spread on base rate		1.00%
Senior Lien [Member] \| Secured Debt [Member] \| Credit Agreement [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Debt instrument face amount	70,000,000.0	$ 70,000,000.0
Letters of credit issued	24,800,000	$ 24,800,000
Interest rate spread on base rate		0.05%
Credit facility commitment fee percentage subject to upward or downward adjustments		0.01%
Senior Lien [Member] \| Secured Debt [Member] \| Credit Agreement [Member] \| SOFR [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Line of credit interest rate terms		at the Company's option, either at the Term SOFR (with a floor of 0.00%) plus a 0.10% SOFR adjustment and 1.00% per annum or base rate (with a floor of 0.00%) plus 0.00% per annum.
Senior Lien [Member] \| Secured Debt [Member] \| Credit Agreement [Member] \| Prime Plus [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Interest rate spread on base rate		0.00%
Senior Lien [Member] \| Secured Debt [Member] \| Credit Agreement [Member] \| Minimum [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Credit facility unused commitment fee percentage		0.10%
Senior Lien [Member] \| Secured Debt [Member] \| Credit Agreement [Member] \| Maximum [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Credit facility unused commitment fee percentage		0.225%
Senior Lien [Member] \| Secured Debt [Member] \| Credit Agreement [Member] \| Swingline Loan Sub-facility [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Debt instrument face amount	50,000,000.0	$ 50,000,000.0
Senior Lien [Member] \| Secured Debt [Member] \| Current Credit Facility Agreement [Member] \| SOFR [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Interest rate spread on base rate		0.10%
Senior Lien [Member] \| Secured Debt [Member] \| Current Credit Facility Agreement [Member] \| Secured Overnight Financing Rate [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Interest rate spread on base rate		1.00%
Senior Lien [Member] \| Secured Debt [Member] \| Former Credit Facility [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Capitalized debt issuance costs				$ 500,000
Senior Lien [Member] \| Secured Debt [Member] \| $700.0 million Credit Facility [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Debt instrument face amount	$ 700,000,000.0	$ 700,000,000.0
Senior Lien [Member] \| Secured Debt [Member] \| $700.0 million Credit Facility [Member] \| Credit Agreement [Member]
Long Term Debt And Finance Lease Liabilities [Line Items]
Credit facility maximum borrowing capacity			$ 700,000,000.0
Capitalized debt issuance costs			$ 3,400,000