Quarterly report pursuant to Section 13 or 15(d)

Retirement Benefit Plans (Net Periodic Expense) (Details)

v3.7.0.1
Retirement Benefit Plans (Net Periodic Expense) (Details) - USD ($)
$ in Millions
3 Months Ended
Apr. 29, 2017
Apr. 30, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Net periodic benefit expense/(income) $ (2) $ 2
Other Postretirement Benefit Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Net periodic benefit expense/(income)   (4)
Primary Pension Plan    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Defined benefit plan obligation increase (decrease) due to remeasurement and curtailment 3  
Service cost 11 14
Interest cost 37 38
Expected return on plan assets (54) (54)
Amortization of prior service cost/(credit) 2 2
Net periodic benefit expense/(income) (4) 0
Supplemental Pension Plans    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Defined benefit plan obligation increase (decrease) due to remeasurement and curtailment (3)  
Service cost 0 0
Interest cost 2 2
Amortization of prior service cost/(credit) 0 0
Net periodic benefit expense/(income) 2 2
Primary and Supplemental Pension Plans Total    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Service cost 11 14
Interest cost 39 40
Expected return on plan assets (54) (54)
Amortization of prior service cost/(credit) 2 2
Net periodic benefit expense/(income) $ (2) $ 2