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Pension and Postretirement Health Care Plans (Details 3) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Feb. 01, 2014
Feb. 02, 2013
Actual return on plan assets    
Fair value of plan assets at end of period $ 3,267 $ 3,223
Level 3
   
Actual return on plan assets    
Fair value of plan assets at end of period 348 358
Private equity funds
   
Actual return on plan assets    
Fair value of plan assets at end of period 221 236
Private equity funds | Level 3
   
Level 3 Reconciliation    
Fair value of plan assets at beginning of period 236 283
Actual return on plan assets    
Assets held at reporting date 7 17
Assets sold during the period 26 25
Purchases, sales and settlements (48) (89)
Fair value of plan assets at end of period 221 236
Other assets
   
Actual return on plan assets    
Fair value of plan assets at end of period 170 154
Other assets | Level 3
   
Level 3 Reconciliation    
Fair value of plan assets at beginning of period 122 115
Actual return on plan assets    
Assets held at reporting date 14 4
Assets sold during the period 1  
Purchases, sales and settlements (10) 3
Fair value of plan assets at end of period $ 127 $ 122