Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS - Additional Information (Details)

v3.10.0.1
FAIR VALUE MEASUREMENTS - Additional Information (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt, carrying values $ 2,162.8 $ 2,218.8
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt, fair values $ 2,325.2 $ 2,403.9