Leases (Details)	12 Months Ended
	Jan. 30, 2016
Operating Leased Assets [Line Items]
Leases subject to renewal options, percentage	51.00%
Office Building [Member]
Operating Leased Assets [Line Items]
Average lease terms	10 years
Minimum [Member] | Office Building [Member]
Operating Leased Assets [Line Items]
Lessee Leasing Arrangements, Operating Leases, Term of Contract	5 years
Minimum [Member] | Retail Site [Member]
Operating Leased Assets [Line Items]
Lessee Leasing Arrangements, Operating Leases, Term of Contract	5 years
Maximum [Member] | Office Building [Member]
Operating Leased Assets [Line Items]
Lessee Leasing Arrangements, Operating Leases, Term of Contract	20 years
Maximum [Member] | Retail Site [Member]
Operating Leased Assets [Line Items]
Lessee Leasing Arrangements, Operating Leases, Term of Contract	10 years