Quarterly report pursuant to Section 13 or 15(d)

Retirement Benefit Plans (Net Periodic Expense) (Details)

v3.5.0.2
Retirement Benefit Plans (Net Periodic Expense) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 30, 2016
Aug. 01, 2015
Jul. 30, 2016
Aug. 01, 2015
Jan. 30, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Net periodic benefit expense/(income) $ 2 $ (16) [1] $ 4 $ (35)  
Other Postretirement Benefit Plan [Member]          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Net periodic benefit expense/(income) (4) (2) (8) (4)  
Defined Benefit Plan, Accumulated Benefit Obligation 1   1   $ 8
Primary Pension Plan          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Service cost 14 18 28 35  
Interest cost 38 49 76 98  
Other cost 0 3 0 3  
Expected return on plan assets (54) (89) (108) (178)  
Amortization of prior service cost/(credit) 2 2 4 4  
Net periodic benefit expense/(income) 0 (17) 0 (38)  
Supplemental Pension Plans          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Interest cost 2 1 4 3  
Net periodic benefit expense/(income) 2 1 4 3  
Primary and Supplemental Pension Plans Total          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Service cost 14 18 28 35  
Interest cost 40 50 80 101  
Other cost 0 3 0 3  
Expected return on plan assets (54) (89) (108) (178)  
Amortization of prior service cost/(credit) 2 2 4 4  
Net periodic benefit expense/(income) $ 2 $ (16) $ 4 $ (35)  
[1] As Adjusted