Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity Stockholders' Equity (Reclassifications Out of Accumulated Other Comprehensive Income/ (Loss) (Details) (Details)

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Stockholders' Equity Stockholders' Equity (Reclassifications Out of Accumulated Other Comprehensive Income/ (Loss) (Details) (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 28, 2017
Jan. 30, 2016
Jan. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Reclassification for amortization of prior service (credit)/cost (6) [1] $ 0 $ 2 $ (1)
Reclassification of net actuarial (gain)/loss recognized in net periodic benefit expense/(income) from a settlement, gross amount   180  
Other comprehensive income/(loss) 18 (141) (491)
Primary and Supplemental Pension Plans Total      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Amortization of actuarial (gain)/loss 11 53 12
Amortization of prior service cost/(credit) 8 8 7
Selling, General and Administrative Expenses [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Reclassification for amortization of net actuarial (gain)/loss included in net periodic benefit expense/(income), gross amount 9 0 0
Amortization of prior service (credit)/cost $ (8) $ (7) $ (8)
[1] Net of $- million of tax in 2016, $(1) million of tax in 2015 and $- million of tax in 2014. Pre-tax amounts of $8 million in 2016, $8 million in 2015 and $7 million in 2014 were recognized in Pension in the Consolidated Statement of Operations. Pre-tax amounts of $(8) million in 2016, $(7) million in 2015 and $(8) million in 2014 were recognized in SG&A in the Consolidated Statement of Operations.