Annual report pursuant to Section 13 and 15(d)

Financing (Schedule of Company Debt) (Details)

v3.7.0.1
Financing (Schedule of Company Debt) (Details) - USD ($)
$ in Millions
Jan. 28, 2017
Jan. 30, 2016
Dec. 07, 2015
Nov. 18, 2014
May 23, 2014
Unamortized debt issue costs $ (29) $ (32)      
Unamortized debt discount (16) (16)      
2.875% Senior notes due 2023 [Member]          
Debt instrument, principal outstanding $ 750 750      
Debt instrument interest rate, stated percentage 2.875%        
3.875% Senior notes due 2022 [Member]          
Debt instrument, principal outstanding $ 550 550      
Debt instrument interest rate, stated percentage 3.875%        
4.5% senior notes due 2034[Member]          
Debt instrument, principal outstanding $ 550 550      
Debt instrument interest rate, stated percentage 4.50%     4.50%  
3.45% senior notes due 2021 [Member]          
Debt instrument, principal outstanding $ 500 500      
Debt instrument interest rate, stated percentage 3.45%   3.45%    
3.625% senior notes due 2024 [Member]          
Debt instrument, principal outstanding $ 500 500      
Debt instrument interest rate, stated percentage 3.625%       3.625%
6.375% Senior Notes Due 2037 [Member]          
Debt instrument, principal outstanding $ 500 500      
Debt instrument interest rate, stated percentage 6.375%        
4.375% Senior notes due 2023 [Member]          
Debt instrument, principal outstanding $ 400 400      
Debt instrument interest rate, stated percentage 4.375%        
6.9% Senior Debentures Due 2029 [Member]          
Debt instrument, principal outstanding $ 400 400      
Debt instrument interest rate, stated percentage 6.90%        
6.7% Senior Debentures Due 2034 [Member]          
Debt instrument, principal outstanding $ 400 400      
Debt instrument interest rate, stated percentage 6.70%        
7.45% Senior Debentures Due 2017 [Member]          
Debt instrument, principal outstanding $ 0 300      
Debt instrument interest rate, stated percentage 7.45%        
6.65% Senior Debentures Due 2024 [Member]          
Debt instrument, principal outstanding $ 300 300      
Debt instrument interest rate, stated percentage 6.65%        
7.0% Senior Debentures Due 2028 [Member]          
Debt instrument, principal outstanding $ 300 300      
Debt instrument interest rate, stated percentage 7.00%        
6.9% Senior Debentures Due 2032 [Member]          
Debt instrument, principal outstanding $ 250 250      
Debt instrument interest rate, stated percentage 6.90%        
5.125% Senior debentures due 2042 [Member]          
Debt instrument, principal outstanding $ 250 250      
Debt instrument interest rate, stated percentage 5.125%        
4.3% Senior notes due 2043 [Member]          
Debt instrument, principal outstanding $ 250 250      
Debt instrument interest rate, stated percentage 4.30%        
6.7% Senior Debentures Due 2028 [Member]          
Debt instrument, principal outstanding $ 200 200      
Debt instrument interest rate, stated percentage 6.70%        
6.79% Senior Debentures Due 2027 [Member]          
Debt instrument, principal outstanding $ 165 165      
Debt instrument interest rate, stated percentage 6.79%        
7.875% Senior Debentures Due 2036 [Member]          
Debt instrument, principal outstanding $ 0 108      
Debt instrument interest rate, stated percentage 7.875%        
8.75% Senior Debentures Due 2029 [Member]          
Debt instrument, principal outstanding $ 61 61      
Debt instrument interest rate, stated percentage 8.75%        
8.5% Senior Debentures Due 2019 [Member]          
Debt instrument, principal outstanding $ 36 36      
Debt instrument interest rate, stated percentage 8.50%        
10.25% Senior Debentures Due 2021 [Member]          
Debt instrument, principal outstanding $ 33 33      
Debt instrument interest rate, stated percentage 10.25%        
9.5% Amortizing Debentures Due 2021 [Member]          
Debt instrument, principal outstanding $ 14 17      
Debt instrument interest rate, stated percentage 9.50%        
7.6% Senior Debentures Due 2025 [Member]          
Debt instrument, principal outstanding $ 24 24      
Debt instrument interest rate, stated percentage 7.60%        
9.75% Amortizing Debentures Due 2021 [Member]          
Debt instrument, principal outstanding $ 8 9      
Debt instrument interest rate, stated percentage 9.75%        
7.875% Senior Debentures Due 2030 [Member]          
Debt instrument, principal outstanding $ 18 18      
Debt instrument interest rate, stated percentage 7.875%        
Premium on acquired debt          
Debt instrument, principal outstanding $ 121 143      
Premium on acquired debt | Minimum [Member]          
Debt instrument interest rate, effective percentage 5.542%        
Premium on acquired debt | Maximum [Member]          
Debt instrument interest rate, effective percentage 6.021%        
Capital Lease and Other Long-Term Obligations [Member]          
Debt instrument, principal outstanding $ 27 29      
Total Of Long Term Debt [Member]          
Debt instrument, principal outstanding 6,562 6,995      
7.45% Senior debentures due 2017 [Member]          
Debt instrument, principal outstanding $ 300 0      
Debt instrument interest rate, stated percentage 7.45%        
5.90% Senior Notes Due 2016 [Member]          
Debt instrument, principal outstanding $ 0 577      
Debt instrument interest rate, stated percentage 5.90%        
7.45% Senior Debentures Due 2016 [Member]          
Debt instrument, principal outstanding $ 0 59      
Debt instrument interest rate, stated percentage 7.45%        
Capital Lease and Current Portion of Other Long-Term Obligations          
Debt instrument, principal outstanding $ 9 6      
Short-term Debt [Member]          
Debt instrument, principal outstanding $ 309 $ 642