LEASES - THE COMPANY AS LESSOR - Schedule of Total Rental Income, Excluding Tenant Reimbursements under Operating Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Leases [Abstract]
Tenant reimbursements	$ 31.8	$ 30.2	$ 28.8
Minimum rentals	95.2	96.2	89.8
Contingent rentals (based on sales volume)	5.4	4.8	4.7
Total	$ 100.6	$ 101.0	$ 94.5