Retirement Benefit Plans (Net Periodic Expense) (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
May 04, 2019 |
May 05, 2018 |
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | ||
| Service cost | $ 7 | $ 9 |
| Interest cost | 33 | 35 |
| Expected return on plan assets | (48) | (56) |
| Amortization of prior service cost/(credit) | 2 | 2 |
| Net periodic pension expense/(income) | (6) | (10) |
| Other components of net periodic pension cost/(income) | $ (13) | $ (19) |