Discontinued Operations - Summary of Company's Operating Results and Certain Other Directly Attributable Expenses (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 09, 2017	Sep. 10, 2016	Sep. 09, 2017	Sep. 10, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of tax			$ 0	$ 49
Save-A-Lot and NAI | Discontinued Operations, Held-for-sale or Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 0	$ 1,060	0	2,491
Cost of sales	0	893	0	2,095
Gross profit	0	167	0	396
Selling and administrative expenses	0	135	1	319
Operating earnings (loss)	0	32	(1)	77
Interest expense, net	0	0	0	1
Earnings (loss) from discontinued operations before income taxes	0	32	(1)	76
Income tax provision (benefit)	$ 0	$ 12	$ (1)	$ 29