FAIR VALUE MEASUREMENTS - Schedule of Fair Values of Financial Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Liabilities:
Fair Value, Long-term debt, including current portion	$ 2,770.9	$ 1,818.0
Carrying Value, Long-term debt, including current portion	2,681.2	1,813.7
Level 1 [Member]
Liabilities:
Fair Value, Long-term debt, including current portion	0.0	0.0
Level 2 [Member]
Liabilities:
Fair Value, Long-term debt, including current portion	2,770.9	1,818.0
Level 3 [Member]
Liabilities:
Fair Value, Long-term debt, including current portion	$ 0.0	$ 0.0