Annual report pursuant to Section 13 and 15(d)

Retirement Benefit Plans (Postretirement Plan (Income)) (Details)

v3.3.1.900
Retirement Benefit Plans (Postretirement Plan (Income)) (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 07, 2005
Jan. 30, 2016
Jan. 31, 2015
Feb. 01, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Net periodic benefit expense/(income)   $ (162) $ 48 [1] $ 41 [1]
Other Postretirement Benefit Plan, Defined Benefit [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Reduction of plan benefits, employee age (post-age) 65 years      
Reduction of plan benefits (percent) 45.00%      
Net periodic benefit expense/(income)   7 8 $ 8
Accumulated postretirement benefit obligation   $ 8 $ 11  
[1] As Adjusted