Summary of Significant Accounting Policies Revision Table (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 12, 2015	Sep. 06, 2014	Sep. 12, 2015	Sep. 06, 2014
Segment Reporting Information [Line Items]
Net sales	$ 4,062	$ 4,041	$ 9,469	$ 9,305
Sales Revenue Net Percent To Net Sales	100.00%	100.00%	100.00%	100.00%
Cost of sales	$ 3,479	$ 3,467	$ 8,076	$ 7,976
Gross Profit	583	574	1,393	1,329
Selling and administrative expenses	489	480	1,141	1,100
Operating Income (Loss)	94	94	252	229
Scenario, Previously Reported [Member]
Segment Reporting Information [Line Items]
Net sales		$ 4,018		$ 9,252
Sales Revenue Net Percent To Net Sales		100.00%		100.00%
Cost of sales		$ 3,446		$ 7,928
Gross Profit		572		1,324
Selling and administrative expenses		478		1,095
Operating Income (Loss)		94		229
Scenario, Adjustment [Member]
Segment Reporting Information [Line Items]
Net sales		$ 23		$ 53
Sales Revenue Net Percent To Net Sales		0.00%		0.00%
Cost of sales		$ 21		$ 48
Gross Profit		2		5
Selling and administrative expenses		2		5
Operating Income (Loss)		0		0
Independent Business [Member]
Segment Reporting Information [Line Items]
Net sales	$ 1,831	$ 1,835	$ 4,293	$ 4,255
Sales Revenue Net Percent To Net Sales	45.10%	45.40%	45.40%	45.80%
Operating Income (Loss)	$ 49	$ 54	$ 126	$ 120
Independent Business [Member] | Scenario, Previously Reported [Member]
Segment Reporting Information [Line Items]
Net sales		$ 1,820		$ 4,220
Sales Revenue Net Percent To Net Sales		45.30%		45.60%
Independent Business [Member] | Scenario, Adjustment [Member]
Segment Reporting Information [Line Items]
Net sales		$ 15		$ 35
Sales Revenue Net Percent To Net Sales		0.10%		0.20%
Save-A-Lot [Member]
Segment Reporting Information [Line Items]
Net sales	$ 1,091	$ 1,057	$ 2,499	$ 2,413
Sales Revenue Net Percent To Net Sales	26.80%	26.20%	26.40%	25.90%
Operating Income (Loss)	$ 32	$ 26	$ 83	$ 72
Save-A-Lot [Member] | Scenario, Previously Reported [Member]
Segment Reporting Information [Line Items]
Net sales		$ 1,050		$ 2,398
Sales Revenue Net Percent To Net Sales		26.10%		25.90%
Save-A-Lot [Member] | Scenario, Adjustment [Member]
Segment Reporting Information [Line Items]
Net sales		$ 7		$ 15
Sales Revenue Net Percent To Net Sales		0.10%		0.00%
Retail Food [Member]
Segment Reporting Information [Line Items]
Net sales	$ 1,092	$ 1,105	$ 2,565	$ 2,535
Sales Revenue Net Percent To Net Sales	26.90%	27.30%	27.10%	27.20%
Operating Income (Loss)	$ 10	$ 20	$ 43	$ 50
Retail Food [Member] | Scenario, Previously Reported [Member]
Segment Reporting Information [Line Items]
Net sales		$ 1,104		$ 2,532
Sales Revenue Net Percent To Net Sales		27.50%		27.40%
Retail Food [Member] | Scenario, Adjustment [Member]
Segment Reporting Information [Line Items]
Net sales		$ 1		$ 3
Sales Revenue Net Percent To Net Sales		(0.20%)		(0.20%)
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Net sales	$ 48	$ 44	$ 112	$ 102
Sales Revenue Net Percent To Net Sales	1.20%	1.10%	1.10%	1.10%
Operating Income (Loss)	$ 3	$ (6)	$ 0	$ (13)
Corporate Segment [Member] | Scenario, Previously Reported [Member]
Segment Reporting Information [Line Items]
Net sales		$ 44		$ 102
Sales Revenue Net Percent To Net Sales		1.10%		1.10%
Corporate Segment [Member] | Scenario, Adjustment [Member]
Segment Reporting Information [Line Items]
Net sales		$ 0		$ 0
Sales Revenue Net Percent To Net Sales		0.00%		0.00%