Defined Benefit Pension Plans and Other Postretirement Benefit Plans - Net Periodic Benefit Cost Assumptions (Details)	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.30%	3.55%	4.40%
Expected long-term rate of return on plan assets	6.35%	6.35%	6.75%
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.04%	3.31%	4.40%
Expected long-term rate of return on plan assets	0.00%	0.00%	0.00%
Rate of compensation increase	0.00%	0.00%	0.00%