Annual report pursuant to Section 13 and 15(d)

Retirement Benefit Plans (Level 3 Investment Assets) (Details)

v2.4.0.8
Retirement Benefit Plans (Level 3 Investment Assets) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Feb. 01, 2014
Feb. 02, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Number of hedge fund managers (more than) 30  
Corporate bonds [Member]
   
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of year $ 10 $ 9
Transfers, net 0 0
Realized gains 0 (1)
Unrealized gains/(losses) (1) 0
Purchases and issuances 2 6
Sales, maturities and settlements 0 (4)
Balance, end of year 11 10
Corporate loans [Member]
   
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of year 12 27
Transfers, net 0 0
Realized gains 0 (1)
Unrealized gains/(losses) 0 0
Purchases and issuances 2 3
Sales, maturities and settlements (8) (17)
Balance, end of year 6 12
Hedge Funds [Member]
   
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of year 0  
Transfers, net 0  
Realized gains 0  
Unrealized gains/(losses) 3  
Purchases and issuances 150  
Sales, maturities and settlements 0  
Balance, end of year 153  
Private Equity Funds [Member]
   
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of year 297 299
Transfers, net 0 0
Realized gains 38 33
Unrealized gains/(losses) 3 (5)
Purchases and issuances 33 47
Sales, maturities and settlements (73) (77)
Balance, end of year 298 297
Private real estate [Member]
   
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of year 231 255
Transfers, net 0 3
Realized gains 5 0
Unrealized gains/(losses) 11 7
Purchases and issuances 4 6
Sales, maturities and settlements (47) (40)
Balance, end of year $ 204 $ 231