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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	4 Months Ended
	Jun. 17, 2017	Jun. 18, 2016
Income Tax [Line Items]
Discrete Tax Expense	$ 5	$ 0

X

- Definition

Discrete Tax Expense

+ References

No definition available.

+ Details

Name:	svu_DiscreteTaxExpense
Namespace Prefix:	svu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Income Tax [Line Items]

+ References

No definition available.

+ Details

Name:	svu_IncomeTaxLineItems
Namespace Prefix:	svu_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration