Retirement Benefits Plans (Estimated Future Benefit Payments) (Details) - USD ($)
$ in Millions |
3 Months Ended |
12 Months Ended |
Jan. 30, 2016 |
Feb. 03, 2018 |
Jan. 28, 2017 |
Jan. 30, 2016 |
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |
|
$ 21
|
$ 19
|
$ 162
|
| Primary and Supplemental Pension Plans Total [Member] |
|
|
|
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
|
|
| Defined Benefit Plan, Amortization of Prior Service Cost (Credit) |
|
7
|
8
|
8
|
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |
|
21
|
19
|
162
|
| Defined Benefit Plan, Service Cost |
|
42
|
55
|
69
|
| Defined Benefit Plan, Interest Cost |
|
150
|
160
|
203
|
| Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |
|
(13)
|
0
|
(180)
|
| Pension Plan [Member] |
|
|
|
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
|
|
| Defined Benefit Plan, Amortization of Prior Service Cost (Credit) |
|
7
|
8
|
8
|
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |
|
(11)
|
1
|
154
|
| Defined Benefit Plan, Service Cost |
|
42
|
55
|
69
|
| Defined Benefit Plan, Interest Cost |
|
143
|
153
|
196
|
| Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
|
|
|
|
| 2018 |
|
195
|
|
|
| 2019 |
|
196
|
|
|
| 2020 |
|
199
|
|
|
| 2021 |
|
202
|
|
|
| 2022 |
|
206
|
|
|
| 2023-2027 |
|
1,080
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |
$ 180
|
(13)
|
0
|
(180)
|
| Supplemental Employee Retirement Plan [Member] |
|
|
|
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
|
|
| Defined Benefit Plan, Amortization of Prior Service Cost (Credit) |
|
0
|
0
|
0
|
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |
|
32
|
18
|
8
|
| Defined Benefit Plan, Service Cost |
|
0
|
0
|
0
|
| Defined Benefit Plan, Interest Cost |
|
7
|
7
|
7
|
| Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
|
|
|
|
| 2018 |
|
29
|
|
|
| 2019 |
|
28
|
|
|
| 2020 |
|
26
|
|
|
| 2021 |
|
21
|
|
|
| 2022 |
|
8
|
|
|
| 2023-2027 |
|
$ 44
|
|
|
| Other Postretirement Benefit Plan, Defined Benefit [Member] |
|
|
|
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |
|
|
$ (17)
|
$ (7)
|