Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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FINANCIAL INSTRUMENTS AND FAIR VALUE (Summary of Carrying Values and Fair Values of Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Oct. 31, 2015	Dec. 31, 2014	Dec. 04, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total carrying value	$ 922.2	$ 913.0
Total fair value	983.7	876.7
Mortgages Notes Payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total carrying value	323.4	307.0
Total fair value	364.2	306.7
6.0% Senior Subordinated Notes due 2024 \| Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total carrying value	598.8	606.0
Total fair value	$ 619.5	$ 570.0
Stated interest rate of debt instrument	6.00%		6.00%	6.00%	6.00%