Long-term Debt (Schedule Of Long-term Debt Instruments) (Details) (USD $)	Jul. 28, 2012	Jan. 28, 2012	Jul. 30, 2011	Jul. 28, 2012 Fixed Rate 5.625 Percent Notes Due February 2022 [Member]	Feb. 29, 2012 Fixed Rate 5.625 Percent Notes Due February 2022 [Member]	Jan. 28, 2012 Fixed Rate 5.625 Percent Notes Due February 2022 [Member]	Jul. 30, 2011 Fixed Rate 5.625 Percent Notes Due February 2022 [Member]	Jul. 28, 2012 Fixed Rate 6.625 Percent Notes Due April 2021 [Member]	Jan. 28, 2012 Fixed Rate 6.625 Percent Notes Due April 2021 [Member]	Jul. 30, 2011 Fixed Rate 6.625 Percent Notes Due April 2021 [Member]	Mar. 31, 2011 Fixed Rate 6.625 Percent Notes Due April 2021 [Member]	Jul. 28, 2012 Fixed Rate 8.50% Notes Due June 2019 [Member]	Jan. 28, 2012 Fixed Rate 8.50% Notes Due June 2019 [Member]	Jul. 30, 2011 Fixed Rate 8.50% Notes Due June 2019 [Member]	Jul. 28, 2012 Fixed Rate 7.00% Notes Due May 2020 [Member]	Jan. 28, 2012 Fixed Rate 7.00% Notes Due May 2020 [Member]	Jul. 30, 2011 Fixed Rate 7.00% Notes Due May 2020 [Member]	Jul. 28, 2012 Fixed Rate 6.90% Notes Due July 2017 [Member]		Jan. 28, 2012 Fixed Rate 6.90% Notes Due July 2017 [Member]		Jul. 30, 2011 Fixed Rate 6.90% Notes Due July 2017 [Member]		Jul. 28, 2012 Fixed Rate 5.25% Notes Due November 2014 [Member]		Jan. 28, 2012 Fixed Rate 5.25% Notes Due November 2014 [Member]		Jul. 30, 2011 Fixed Rate 5.25% Notes Due November 2014 [Member]		Jul. 28, 2012 Fixed Rate 6.95% Debentures Due March 2033 [Member]	Jan. 28, 2012 Fixed Rate 6.95% Debentures Due March 2033 [Member]	Jul. 30, 2011 Fixed Rate 6.95% Debentures Due March 2033 [Member]	Jul. 28, 2012 Fixed Rate 7.60% Notes Due July 2037 [Member]	Jan. 28, 2012 Fixed Rate 7.60% Notes Due July 2037 [Member]	Jul. 30, 2011 Fixed Rate 7.60% Notes Due July 2037 [Member]	Jul. 28, 2012 Fixed Rate 6.125% Notes Due December 2012 [Member]		Jan. 28, 2012 Fixed Rate 6.125% Notes Due December 2012 [Member]		Jul. 30, 2011 Fixed Rate 6.125% Notes Due December 2012 [Member]		Jul. 28, 2012 Parent Company [Member]	Jan. 28, 2012 Parent Company [Member]	Jul. 30, 2011 Parent Company [Member]
Senior Unsecured Debt with Subsidiary Guarantee	$ 2,889,000,000	$ 1,888,000,000	$ 1,887,000,000	$ 1,000,000,000		$ 0	$ 0	$ 1,000,000,000	$ 1,000,000,000	$ 1,000,000,000		$ 489,000,000	$ 488,000,000	$ 487,000,000	$ 400,000,000	$ 400,000,000	$ 400,000,000
Senior Unsecured Debt	1,648,000,000	1,650,000,000	1,637,000,000															723,000,000	[1]	724,000,000	[1]	711,000,000	[1]	219,000,000	[2]	220,000,000	[2]	219,000,000	[2]	350,000,000	350,000,000	350,000,000	299,000,000	299,000,000	299,000,000	57,000,000	[3]	57,000,000	[3]	58,000,000	[3]
Long-term Debt	4,537,000,000	3,538,000,000	3,524,000,000
Current Portion of Long-term Debt	(57,000,000)	(57,000,000)	0																																							(57,000,000)	(57,000,000)
Total Long-term Debt, Net of Current Portion	4,480,000,000	3,481,000,000	3,524,000,000																																							4,480,000,000	3,481,000,000	3,524,000,000
Debt Instrument, Face Amount					1,000,000,000						1,000,000,000
Debt Instrument, Stated Rate					5.625%						6.625%
Principal Balance Outstanding																								213,000,000		213,000,000		213,000,000								57,000,000		57,000,000		57,000,000
Fair Value Interest Rate Hedge Adjustment																		$ 24,000,000		$ 25,000,000		$ 12,000,000		$ 6,000,000		$ 7,000,000		$ 7,000,000												$ 1,000,000

[1] The balances include a fair value interest rate hedge adjustment which increased the debt balance by $24 million as of July 28, 2012, $25 million as of January 28, 2012 and $12 million as of July 30, 2011.

[2] The principal balance outstanding was $213 million as of July 28, 2012, January 28, 2012 and July 30, 2011. The balances include a fair value interest rate hedge adjustment which increased the debt balance by $6 million as of July 28, 2012, $7 million as of January 28, 2012 and $7 million as of July 30, 2011.

[3] The principal balance outstanding was $57 million as of July 28, 2012, January 28, 2012 and July 30, 2011. The July 30, 2011 balance includes a fair value interest rate hedge adjustment which increased the debt balance by $1 million.