Retirement Benefit Plans (Obligations and Funded Status) (Details) (USD $)
In Millions, unless otherwise specified
 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Oct. 15, 2011
Feb. 01, 2014
Oct. 15, 2011
Primary Pension Plan
Feb. 01, 2014
Primary Pension Plan
Feb. 02, 2013
Primary Pension Plan
Jan. 28, 2012
Primary Pension Plan
Sep. 30, 2012
Primary Pension Plan
Jan. 27, 2012
Primary Pension Plan
Feb. 01, 2014
Supplemental Pension Plans
Feb. 02, 2013
Supplemental Pension Plans
Jan. 28, 2012
Supplemental Pension Plans
Sep. 30, 2012
Supplemental Pension Plans
Jan. 27, 2012
Supplemental Pension Plans
Feb. 01, 2014
Other Postretirement Benefit Plan, Defined Benefit [Member]
Feb. 02, 2013
Other Postretirement Benefit Plan, Defined Benefit [Member]
Jan. 28, 2012
Other Postretirement Benefit Plan, Defined Benefit [Member]
Sep. 30, 2012
Other Postretirement Benefit Plan, Defined Benefit [Member]
Feb. 01, 2014
Other Postretirement Benefit Plan, Defined Benefit [Member]
Other Accounts Payable and Accrued Expenses [Member]
Feb. 02, 2013
Other Postretirement Benefit Plan, Defined Benefit [Member]
Other Accounts Payable and Accrued Expenses [Member]
Dec. 31, 2012
Exceeded 100% [Member]
Primary Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]                                        
Funded status of the plan (percent)       115.00%                               100.00%
Change in APBO                                        
Beginning balance       $ 5,042 $ 5,297   $ 5,550   $ 303 $ 309   $ 300   $ 18 $ 24   $ 18      
Service cost       78 87 88     0 1 2                  
Interest cost       204 242 247     12 13 13     1 1 1        
Participant contributions                           13 14          
Special termination benefits 176   133 0 0       0 0                    
Amendments       17 42       (8) 0                    
Curtailments       0 (80)       0 (13)       0 (2)          
Settlements       0 (439)       0 0                    
Actuarial loss/(gain)       (442) 204       (34) 59       0 (3)          
Benefits (paid)       (422) (311)       (54) (66)       (17) (16)          
Balance at measurement date       4,477 5,042 5,297 5,550   219 303 309 300   15 18 24 18      
Change in fair value of plan assets                                        
Beginning Balance       5,035       5,176 0       0              
Participant contributions                           13 14          
Company contributions       0 0       54 66       4 2          
Actual return on assets       527 609       0 0                    
Settlements       0 (439)       0 0                    
Benefits (paid)       (422) (311)       (54) (66)       (17) (16)          
Balance at measurement date       5,140 5,035     5,176 0 0     0              
Funded status of the plan       663 (7)       (219) (303)       (15) (18)     2 2  
Current portion of pension plan liability accrued                 44 53                    
Increase in funded status of plan       $ 670                                
Actual return on plan assets (percent)   11.10%                                    
Cumulative return on plan assets since inception (percent)   9.00%