Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Retirement Benefit Plans (Accumulated Other Comprehensive (Loss)/Income) (Details) - USD ($)
$ in Millions
Feb. 03, 2018
Jan. 28, 2017
Supplemental Employee Retirement Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Net loss/(gain) $ 18 $ 12
Prior service cost/(credit) (3) (4)
Defined Benefit Plan, Accumulated Other Comprehensive Income, before Tax, Total 15 8
Pension Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Net loss/(gain) 169 318
Prior service cost/(credit) 37 49
Defined Benefit Plan, Accumulated Other Comprehensive Income, before Tax, Total 206 [1] $ 367
Defined Benefit Plan, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year $ 7  
[1] (1)In 2018, approximately $7 million for the Primary Pension Plan is expected to be amortized from Accumulated other comprehensive income/(loss) and into the Consolidated Statement of Operations.