Summary of Significant Accounting Policies - Effect of Segment Revision of Administrative Costs (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended			4 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended		4 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended		4 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended					4 Months Ended	6 Months Ended	9 Months Ended	4 Months Ended	6 Months Ended	9 Months Ended	4 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended			4 Months Ended	6 Months Ended	9 Months Ended	4 Months Ended	6 Months Ended	9 Months Ended	4 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended			4 Months Ended	6 Months Ended	9 Months Ended	4 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended	4 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended			4 Months Ended	6 Months Ended	9 Months Ended	4 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended	4 Months Ended	6 Months Ended	9 Months Ended
	Feb. 22, 2014	Feb. 23, 2013	Feb. 25, 2012	Jun. 15, 2013 As Originally Reported [Member]	Sep. 07, 2013 As Originally Reported [Member]	Nov. 30, 2013 As Originally Reported [Member]	Feb. 23, 2013 As Originally Reported [Member]	Feb. 25, 2012 As Originally Reported [Member]	Jun. 15, 2013 Revision [Member]	Sep. 07, 2013 Revision [Member]	Nov. 30, 2013 Revision [Member]	Feb. 23, 2013 Revision [Member]	Feb. 25, 2012 Revision [Member]	Jun. 15, 2013 As Revised [Member]	Sep. 07, 2013 As Revised [Member]	Nov. 30, 2013 As Revised [Member]	Feb. 23, 2013 As Revised [Member]	Feb. 25, 2012 As Revised [Member]	Feb. 22, 2014 Independent Business [Member]	Feb. 23, 2013 Independent Business [Member]	Feb. 25, 2012 Independent Business [Member]	Jun. 15, 2013 Independent Business [Member] As Originally Reported [Member]	Sep. 07, 2013 Independent Business [Member] As Originally Reported [Member]	Nov. 30, 2013 Independent Business [Member] As Originally Reported [Member]	Jun. 15, 2013 Independent Business [Member] Revision [Member]	Sep. 07, 2013 Independent Business [Member] Revision [Member]	Nov. 30, 2013 Independent Business [Member] Revision [Member]	Jun. 15, 2013 Independent Business [Member] As Revised [Member]	Sep. 07, 2013 Independent Business [Member] As Revised [Member]	Nov. 30, 2013 Independent Business [Member] As Revised [Member]	Feb. 22, 2014 Save-A-Lot [Member]	Feb. 23, 2013 Save-A-Lot [Member]	Feb. 25, 2012 Save-A-Lot [Member]	Jun. 15, 2013 Save-A-Lot [Member] As Originally Reported [Member]	Sep. 07, 2013 Save-A-Lot [Member] As Originally Reported [Member]	Nov. 30, 2013 Save-A-Lot [Member] As Originally Reported [Member]	Jun. 15, 2013 Save-A-Lot [Member] Revision [Member]	Sep. 07, 2013 Save-A-Lot [Member] Revision [Member]	Nov. 30, 2013 Save-A-Lot [Member] Revision [Member]	Jun. 15, 2013 Save-A-Lot [Member] As Revised [Member]	Sep. 07, 2013 Save-A-Lot [Member] As Revised [Member]	Nov. 30, 2013 Save-A-Lot [Member] As Revised [Member]	Feb. 22, 2014 Retail Food [Member]	Feb. 23, 2013 Retail Food [Member]	Feb. 25, 2012 Retail Food [Member]	Jun. 15, 2013 Retail Food [Member] As Originally Reported [Member]	Sep. 07, 2013 Retail Food [Member] As Originally Reported [Member]	Nov. 30, 2013 Retail Food [Member] As Originally Reported [Member]	Jun. 15, 2013 Retail Food [Member] Revision [Member]	Sep. 07, 2013 Retail Food [Member] Revision [Member]	Nov. 30, 2013 Retail Food [Member] Revision [Member]	Feb. 22, 2014 Retail Food [Member] Revision [Member]	Jun. 15, 2013 Retail Food [Member] As Revised [Member]	Sep. 07, 2013 Retail Food [Member] As Revised [Member]	Nov. 30, 2013 Retail Food [Member] As Revised [Member]	Feb. 22, 2014 Corporate [Member]	Feb. 23, 2013 Corporate [Member]	Feb. 25, 2012 Corporate [Member]	Jun. 15, 2013 Corporate [Member] As Originally Reported [Member]	Sep. 07, 2013 Corporate [Member] As Originally Reported [Member]	Nov. 30, 2013 Corporate [Member] As Originally Reported [Member]	Jun. 15, 2013 Corporate [Member] Revision [Member]	Sep. 07, 2013 Corporate [Member] Revision [Member]	Nov. 30, 2013 Corporate [Member] Revision [Member]	Feb. 22, 2014 Corporate [Member] Revision [Member]	Jun. 15, 2013 Corporate [Member] As Revised [Member]	Sep. 07, 2013 Corporate [Member] As Revised [Member]	Nov. 30, 2013 Corporate [Member] As Revised [Member]
Operating earnings
Operating earnings (loss)	$ 418	$ (157)	$ 96	$ 82	$ 194	$ 299	$ (157)	$ 96						$ 82	$ 194	$ 299	$ (157)	$ 96	$ 235	$ 199	$ 254	$ 55	$ 128	$ 181				$ 55	$ 128	$ 181	$ 167	$ 143	$ 230	$ 52	$ 84	$ 124				$ 52	$ 84	$ 124	$ 72	$ (160)	$ (36)	$ 25	$ 32	$ 56	$ (20)	$ (20)	$ (20)	$ 20	$ 5	$ 12	$ 36	$ (56)	$ (339)	$ (352)	$ (50)	$ (50)	$ (62)	$ 20	$ 20	$ 20	$ 20	$ (30)	$ (30)	$ (42)
% of sales				1.60%	2.10%	2.30%								1.60%	2.10%	2.30%			2.90%	2.40%	3.10%	2.30%	3.00%	2.90%				2.30%	3.00%	2.90%	3.90%	3.40%	5.40%	4.10%	3.70%	3.80%				4.10%	3.70%	3.80%	1.60%	(3.40%)	(0.70%)	1.70%	1.30%	1.60%	(1.40%)	(0.80%)	(0.60%)		0.30%	0.50%	1.00%