Postretirement Health Care and Life Insurance Benefits (Assumed Health Care Cost Trend Rates) (Details) |
12 Months Ended | |
---|---|---|
Jan. 30, 2016
Rate
|
Jan. 31, 2015
Rate
|
|
Rates to which is the cost trend rate is assumed to decline (the ultimate trend rate) | 5.00% | 5.00% |
Year that the rate reaches the ultimate trend rate | 2027 | 2025 |
Minimum [Member] | ||
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year | 7.27% | 7.27% |
Maximum [Member] | ||
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year | 8.90% | 9.20% |