Annual report pursuant to Section 13 and 15(d)

Retirement Benefit Plans (Accumulated Other Comprehensive (Loss)/Income) (Details)

v3.6.0.2
Retirement Benefit Plans (Accumulated Other Comprehensive (Loss)/Income) (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 28, 2017
Jan. 30, 2016
Supplemental Employee Retirement Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Net loss/(gain) $ 12 $ 13
Prior service cost/(credit) (4) (4)
Defined Benefit Plan, Accumulated Other Comprehensive Income, before Tax, Total 8 9
Pension Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Net loss/(gain) 318 333
Prior service cost/(credit) 49 57
Defined Benefit Plan, Accumulated Other Comprehensive Income, before Tax, Total 367 [1] $ 390
Defined Benefit Plan, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year $ 8  
[1] (1)In 2017, approximately $8 million for the Primary Pension Plan is expected to be amortized from Accumulated other comprehensive income/(loss) into net periodic benefit expense/(income) included in Pension in the Consolidated Statement of Operations.