Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS)/INCOME (Parenthetical)

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS)/INCOME (Parenthetical) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jan. 28, 2012
Jan. 29, 2011
Jan. 30, 2010
Consolidated Statements of Comprehensive (Loss)/Income [Abstract]      
Tax on unrealized (loss)/gain on investments $ (29) $ (27) $ (27)
Tax on Net Unamortized Gain (Loss) 277 (249) (94)
Tax on Prior Service Credit $ 11 $ 9 $ 9